Electronics 负载 series products EL3000A operating Manual
Contents
1. Abts BERRA AE Tak A REI aT A E 6 11 Fo Rt xe AY A ie Bop ic it Ao PR EA A U l P R 420V OL 2 400V EL 3000 A 04 26 2011 7 1 Level 32. 180 gt 0dB 1bF 100hF CU L 60A I A EL3160 60 60 60A 1 35V 45 45A 0 97V 5 30A 0 63V 15A 0 32V 15 0 5 1 1 5 U_ V U 25A I A 25 EL3400 25 15 25A 0 95V 20A 0 74V 10 10A 0 36V 5A 0 18V 0 5 1 1 5 U V EL 3000A
3. 2 2 Input on off t tm we 7 d S s PER papi ipy i podem Eo opp phen d ee ore oe LELLES ese eee 7 7 oe 7 2 EL 3000A 6 2 Power Power 1 Mode Mode 2 cv CP CRior CC CRsoR CP CC
4. 5 4 AUX Aux 1 1V Aux Aux 1 4 0 2mm 2 5mm2 TRIG GND 67 3 Level AB His RE HE HOC FABRE J TH ED o 5 5 xO RE 9 EL 3000 A 04 26 2011 6 3 1 61 Se
5. PLC 0 10V 8 4 BE Hh 8 1 8 4 1 Alf A ag TCL ERE DER TERRI BE Fa A tg HF EIE e T 8 45 T HA o RELA Th RAE Sub D 4 U l P R U l P 12 R active 65 fl DGND Pin 12 Low Pin 12 High 13 R Range Pin 13 L
6. Selection 5 Selection 6 IF U1 LP ele las m Dig g a Bas a LELI Dii 14 Selection 5 Trigger mode Level A B A B internal external internal external internal Device node 1 30 1 30 30 Keep set values yes no yes no yes
7. 6 6 CC CV CP CRior CR4oR 2 ee pe Level Control 3 B AB battery A B A Setup A B A B Level A Level B U P ZEAE WET BEI AiR Bb Mode 2 Keep set values no 7 9 Level Control 3 A gt B B gt A CUT HL ESD Ema se HE TL AK
8. FR P U Keep set values no0 CP 0 yes 7 1 Se 66 CR CR Mode 2 R U 1
9. e 50hs 100s 30hs 200ms 160V amp 60A 400V amp 25A 400W EL 3000 A 2 2 1 80 LCD 2 2 1 AY HER 4 0 0V 999 0V AY HER 4 0 00A 99 99A AY HER 4 0 0W 999 9W AY HER 4 0 00Q9 99 99Q 0 0 999 90 HH MM SS DS HER 1s 1s 99h 59m 59s 99 59 59 Level A B
10. Keep set values no CC 0 yes 7 1 AKA CV Keep set values no0 CV yes 7 1 te CV FA Mi se aN bE th LGR Re o ER fea CVI IPR CUNT ALK BCE 1A FE BRCV ER ISh KER CRA BEE AO CC CP CR WFEIEMIRI Fo ADAP CET fe Hae AL AKER HARK FETA LAIR EW GER Sh BEE tel PRUE RE RA TI sine FES Hh BI BE E a A BERA AEA WR BOR IE HS HICC CP CRITE MR HEA KR AOV CP
11. USB Hub LabView VIs LabView LabView Vls LabView IDEs 22 23 RS232 IF R1 10 10 1
12. DC EL 3000 A 04 26 2011 PE i 5 2 EEEE EEEa 5 2 1 5 2 2 6 EO 7 3 1 7 3 7 3 3 MAE EEEE EEE 8 4 EEEE EEEE EEEE 8 ee 8 4 2 EEEE 8 43 8 4 4 Frege wc nha dhe Gann Race Ona aoe HE Ed ais ORE ana an Od ena LDA Eee Abana un ud ee igang inode 8 4 5 cece nec bbb eben bebe bbb b bbb beb bennett eneenbnbennney 8 4 6 i 8 5 9 Bo bee atone onde Wd bone Seen a head whee aedaeawewuensundenngd hous decahuwaced 9 5 2 ya A Ee ee ee ew ead oe ee eS ee cP Sap HOES How RE RA he ed HSE oa hb Oa ee Sea awed lt 9 5 3 EEEa 9 5 4 AUX PERM ccc cnn bbb ebb b bbb b bbe b ebb bbe eeebnneeennns 9 5 5 QF EEEE EEEE 9 6 E EEEE EEEa 10 EEOC 10 6 2 EEEa 11 6 3 11 6 4 input on off anana aaa a a EEEE e been bebe e bbe e been nennnes 12 6 5 oE EEEE EEEa 12 6 6 12 6 7 Level A Leve B i 13 WTA 13 OF Lee B oerda a a A A a E ee ee 13 6 7 3 Level A B a a 13 6 7 4 EEEE EEEa 14 6 8
13. A B 12 1KHZ gt 1s lA AN A B Level A B 6 7 4 10 30hs 200ms hs ms 10 Avalue Atime AWE 40A B 20A 100ms 20A
14. 4 3 20cm 4 4 RED 4 5 RPM o EAE AF SE Input on off 3 04 26 2011 4 6
15. Keep set values no0 CR yes 7 1 KAKA EL 3000A 04 26 2011 6 7 Level A Leve B Level A Level B Level Control 3 CA B A B 4 5 A B CP A B 6 7 3 A B A B A B A 10ms B 90ms 100ms 10Hz 10
16. 0 100 Remote R active a GND 20 VREF 10V AGND Master 0 100 DGnd PSEL 17 18 Remote 20 04 26 2011 EL 3000 A 8 4 0 10V 0 100 U yon 0 1 2 CSEL Al 0 10V 0 100 Non Ri gt 40k 100K 3 PSEL Al 0 10V 0 100 P won 4 RSEL 0 10V 0 100 R ho Ea AGND POT VSEL CSEL PSEL RSEL VMON CMON PMON
17. PS9000 PSI9000 CAN USB 4 CAN EL3000A 4 0 100 UH E U I P AR e AREA ERGE HE e at CAN USB RS232 IEEE GPIB Ethernet LAN
18. 5 1 5 2 IEC320 10A 1 5m 44 3 x 0 75mm2 5x20mm M0 63A 5 3 Bueschel Zs 60A 2x 6mm 1x 16mm 25A 2x Imm 1x 4mm
19. Setting Setting 6 6 3 04 26 2011 6 4 input on off Input on off 4 pin low REM SB 4 ile 6 5
20. Al DI RSEL D0 Level A B A0 EL 3000 A E 04 26 04 26 2011 9 OF 10 2 2000V Windows IF R1 RS232 IF C1 CAN IF U1 USB We IEE GPIB IF G1 SCPI EIT Ror Wine GRIF R1 IF U1 Sk IF E1F 1 30 IEEE 16 hem Ae A HIFA REETIKA LAE PBE IF E1 IEEE SCPI CARNE ARRIERE SMPTE USB 7
21. Electronic Load Series EL 3000A 160V 60A 400W 400V 25A 400W EL 3160 60A 35 320 200 a SS EL 3400 25A 35 320 201 Elektro Automatik cmn ro Z Elektro Automatik GmbH amp Co KG AN Helmholtzstrasse 31 33 41747 Viersen Germany 49 2162 37850 WUE Ay fik 49 2162 16230 www elektroautomatik cn l oo ee Fe ea1974 elektroautomatik de 80V 100V 160V 180V 400V Elektro Automatik 460V THAT AS SUNTAN A
22. Keep set values yes A Level A B Level B AIB Level A B EL 3000 A Battery 6 7 Level A Level B Setup Input on off 4 WM o EEE PRRI ER it gt 3S Input on off Selection 5 Select
23. External mode Remote mode a TA B A IB Battery Selection 5 Setup 7 1 WASH b Selection 5 Setting 6 Level ABAT Level A Level B Level A Level B Level B Level A 6 6 Mode 2 4 CC CV CP CR CC
24. Input on off 4 100 Input on off 4 Level Control 3 Level A B Setup Mode 2 REMO TE S H K mile Fb SPEDE Level Control FrAVVEF Battery fr Wi lt A IF UG It TA AIAN A BETK E Mooef2 A YA HIA F E LE E AER AIAR A E EA ta PIE Mt AliitKeep set values 13 2400W 45 5A EL 3000 A 04 26 2011 6 9 7 2
25. 20A 100ms delta EB AMIBHKIEIBAK TIHEI BIKE SHE tn KIERKRHE ZH AMBIA EAA 100ms M100mstI IHRT a E200ms ht ERr f ZA HEH RER ZS PIV FLEA EREDAR itil ZN 6 8 AH Ulow Ah Ulow Selection 5 Setting 6 HH MM SS Ah Ah
26. Hy a USB UTA12 USB b USB RS232 CAN GPIB IEEE SCP1 23 LAN SCPI 04 26 2011 EL 3000 A General EN About Elektro Automatik GmbH amp Co KG A Safety instructions Helmholtzstrasse 31 33 41747 Viersen e Only operate the device at a mains voltage as stipulated Germany on the type plate Phone 49 2162 37850 Never insert mechanical parts especially from metal Fax 49 2162 16230 oun the air plete slots Eo o Web AE E A EEN ede e Avoid any use of liquids of any kind in the proximity of the device they might get into it malt eaten Pame Do not connect voltage sources to the device which are able to generate voltages higher than 100Vpc 80V Elektro Automatik model or 180Vpc 160V model or 460Voc 400V model Reprint duplication or partly wrong use of this user In order to equip interface cards into the slot at the instruction manual are prohibited and might be followed rear the common ESD provisions have to be followed by legal consequences The interface card may only be plugged and unplugged while the unit is completely switched off mains switch OFF e Always observe limit and nominal values of the device when connectin
27. 10V VREF GND var 0 10V Level A B H L High Low EL 3000 A 04 26 2011 8 3 AGnd RSEL DGnd PSEL Remote CSEL Rem SB VSEL REM SB DGND 18 OVP OT Trigger In VMON R Range CMON R active VRef 16 CMON VMON REMOTE DGND PSEL VREF
28. 11 6 7 1 Level A Level Control 3 Level A Remote mode External mode 2442 Leve1A Leve1A 2 Selection 5 Setting 6 9 Level B A B Battery test Keep set values no 7 1 OL 6 6 Level A Level Control 6 7 2 Level B Level Control 3 Level B Level
29. 6 6 no CAN Baud rate 10kBd 20KBd 50kBd 100kBd 125kBd 250kBd 500kBd 1MBd 100kBd CAN IF C1 CAN CAN 04 26 2011 CAN Relocatable ID 0 31 0 CAN IF C1 CAN CAN 5 RID ID CAN 32 x 30 CAN Bus terminate yes no no CAN IF C1 CAN
30. o Input on off 4 ARRIHEN F RII EN TAER To 6 10
31. S S Gnd Tr High Voltage Mains voltage selector Card T GD _ GED GED GED Gli CHED CHD CD CHED CHD CHED CHED CHD CHED CHED CHED CHED GD CHD C ED Ezz GD CHED CHD Mains fuse CHED GD CHD CHED CHED CHD Card slot GED GEE GD GD CHED CHED E Gap CHD CHED CHD CD CHD CHED CD CHED CHD GD CHD CHED CHED CHED CHED aei Ai ae __ Rt A Sig gt z Gap gt Mains input CE 2 AUX S S Gnd Tr LevelA B EL 3000A E 04_DF 04 26 2011 3 3 1x 1 x 1x 4 4 1 4 2
32. 14 6 9 15 6 10 15 6 11 i 15 2 16 7 1 16 8 EEEE EEEE 17 8 1 i 17 8 2 17 8 3 18 8 4 i 19 9 BOP oo EEEE 20 OO 20 10 1 20 10 2 EEEE EEEa 20 EL 3000 A 04 26 2011 AT i 1 EL3000A PS9000 PSI9000
33. 1 C 4 4 15 Sub D CAN USB RS232 GPIB Ethernet 8 60A 0 2 20A 19 88A 20 12A 10 90 90 10 04 26 2011 EL 3000A 3 3 1 PAT ca Se a aie Two line dot display DC ELECTRONIC LOAD EL 3160 60 Leki kilip GR bd Loewe dl H cei bil J 2 50A 64 O Gi HGA N DC 160V 60A 400W 400R DC Input Mode Level Control Selection Sting cv CP cris a 1 15 Control type 15pole analogue interface diene set values settings Mains switch Operation mode Select the value to adjust Sense input Trigger output Voltage
34. 50us 100s 30us 200ms lt 10 2x 40 0 10V U 1 P R 0 100 0 10V VU 1 0 100 R 10 400Q 0 70 C 30 C 1 C 4 4 15 Sub D 115V 230V 50 60Hz MO 63A 0 400V 100mV lt 0 1 of Unon 0 25A 10mA lt 0 2 of Iron 0 400W 0 1W lt 2 of Pron 0 40Q 10mQ 2 0 3 40 800Q 100mQ 2 0 3 lt 50us 2 2 50us 100s 30us 200ms lt 10 2 x 40 0 10V UV P R 0 100 0 10V VU 1 0 100 R 40 8000 0 70 30 C
35. CAN CAN yes no no RS232 Baud rate 9600 Bd 19200 Bd 38400 Bd 57600 Bd 57600 Bd RS232 IF R1 RS232 IF R1 EL 3000 A 8 15 Sub D 7 6 ok See ee baan el F ped L 15
36. Handling the device 8 3 Sample applications Overview of the pins AGnd RSEL DGnd PSEL Remote CSEL Rem SB VSEL OVP OT Trigger In VMON R Range CMON R active VRef Figure 16 Master Slave operation simulated A true Master Slave is not possible because the analo gue interface does not provide set value outputs But the monitor outputs CMON or in some cases even VMON of the master can be used to control at least one of the four set value inputs of one or multiple slave loads Master DGnd PSEL Figure 17 Since there is no power monitor output the PSEL input s can t be controlled by the master But it could be directly tied to VREF output or via a potentiometer in order to adjust the power between 0 and 100 The inputs Re mote and R active have to be tied to GND at the slave s in order to activate the external control Input off Figure 18 shows the wiring of the analogue interface for remotely switching the input off This feature can be used anytime and does not require the activation of external control by pin Remote It can be combined with other applications and can be realised by various contacts like transistors relays switches etc Instruction Manual EL 3000 A Series EN REM SB DGND Figure 18 Switching to external control Switching to external control is only required if the device is going to be controlled by external analogue signals If using the simulated master slave
37. Other set values can also be accessed and adjusted in the described manner Level Control B AB Battery A Setup Selector Level Control 3 Is used to select the operation mode between normal operation mode A and B pulsed mode A B battery test mode or setup Both A and B use two sets of set values That means that you can adjust different set values for U P etc for A than for B The set values are kept until they are changed When selecting another regulation mode with Mode 2 they will be reset to certain default values if the setting Keep set values is set to no see more in 7 Device configuration Activating the selector Level Control 3 switches the load input off except if it s changed from A gt B resp B gt A because this is used to manually switch between the two levels The most recent set values are stored inside the unit when the unit is switched off or at mains undervoltage power fail and are restored after switching it on again if the setting Keep set values yes has been chosen EL 3000 A Series Instruction Manual 3 gt EN A Switches to the set values of Level A These values become instantly active and can be changed now Explanation of the selector positions B Switches to the set values of Level B These values become instantly active and can be changed now A B Switches the load offline and activates the pulsed mode frequency controlled automatic changeover be
38. A B 8 A B Ext trigger active Selection 5 A B Setting 6 A B gt LevelA B Avalue Atime 10 100A 20ms Level A B KLE tT EI T Level A Level B 10 Level A B EL 3000 A 04 26 2011 EN EB Level A BHIER A FE F2 Level AHJ iE DAMBARK F EF Level BK Ae Ala FEB KBr EWEA WRRM Level AED EWS We ZZA PLevel B BLE a ATE IE fT Level A 12 12 U 1 P or R
39. RS232 GPIB Ethernet for technical specification see section 8 Analogue interface Accuracy is defined as the max allowed difference between actual value and set value always related to the nominal value Example nom value is 60A and accuracy is given with 0 2 A set value of 20A may thus result in an actual value of 19 88A 20 12A Rise and fall time are defined at 10 90 and 90 10 of the nominal value All single values which specify a tolerance are typical values Supported interface cards Date 04 26 2011 Instruction Manual EL 3000 A Series About the device EN 3 Design 3 1 Front view Zweizeiliges Punktedisplay Two line dot display DC ELECTRONIC LOAD EL 3160 60 166 Br 400 Gh Level A gt 460 Gly mn os idii ON DC Eingang 160V 60A 400W 400R DC Input Power Mode Level Control G Selection Setting cp A B Netzschalter cv CRior B Battery e re ee Mains switch RAL Dy A Setup O O Figure 1 Regelungswahl 15polige analoge Schnittstelle Sollwerte Einstellungen andem Control type 15pole analogue interface Change set values settings Betriebsart Auswahl des einzustellenden Wertes Operation mode Select the value to adjust 3 2 Rear view Senseeingang Triggerausgang Sense input Trigger output gt gt Voltage A N select Spannungs wahlschalter ps aE teel Lg iari Mains voltage selector Card Ge Ge CHED GD CH
40. Selecting the set value to adjust In the operation modes A B A B and Battery the set value to change is selected by rotating Selection 5 In the setup menu position Setup it is used to select a different setup parameter Also see 7 1 The setup menu b Adjusting the set value The previously with Selection 5 selected set value is changed with Setting 6 It applies the faster the knob is rotated the faster the set value is increased or decreased the step width changes Slow rotation hence changes the set value in small steps while fast rotation changes it in big steps In case the upper or lower limit of the set value is rea ched while rotating the set value will remain at its limit until changed again by rotating the knob in the opposite direction Important Note that in Level A B mode any set value of Level A must always be greater than or equal to Level B The result of this is that Level A can only be adjusted down to the value of Level B and Level B can only be adjusted up to the value of Level A 6 6 Preselecting the regulation mode The selector Mode 2 preselects the regulation mode which determines the internal regulation characteristic Four regulation modes are available CC CV CP and CR CC means constant current Here are the set values of current and power adjustable In this mode the input current is regulated and limited to the adjusted value current limitation as far as the feeding sou
41. VREF 6 DGND POT 7 Remote LOW U Lo lt 1V USE 0 30V Cae HIGH U nan gt 4V wax 1mA SVE Rem SB LOW U Lo lt 1V U Low to High typ N BrP F HIGH U pig gt 4V DGND 0 10V 0 100 U yon mx 2mA 0 1 Ko 10V 0 100 non AGND VREF AO wx 5mA 0 1 AGND 12 R active Reon R off 1 R 3 LOW Uo lt 1V U 0 30V R HIGH Upin gt 4V l max 1mA 5V 13 R Range Rax 2 LOW U lt 1V Oise ts eee oN Rax 1 HIGH Unig gt 4V DGND 14 Trigger In MEIRAS A gt B LOW U lt 1V B gt A HIGH Upin gt 4V 15 OT OVP wie OT OVP HIGH Uhin gt 4V 15V OT OVP LOW U lt 1V 15V 1 5mA DGND U Low SIV U pign gt AV
42. max 2MA CMON Istwert Strom 0 10V correspond to 0 100 of Nom Short circuit proof against AGND 11 VREF AO Reference voltage 10V Accuracy typically 0 1 at max 5mA 12 R active Selection R on R off R regulation off LOW U Low lt 1V U range 0 30V R regulation on HIGH U pign gt 4V or Open I max 1mA at 5V 13 R Range Select resistance range Rmax resistance range 2 LOW U Low lt 1V JU Lowto High typ 3V ie Rmax resistance range 1 HIGH U pign gt 4V Sender open collector against DGND or open 14 Trigger In Trigger input triggers A gt B LOW U iow lt 1V triggers B gt A HIGH U pign gt 4V or open 15 OT OVP Overtemperature Overvoltage OT or OVP HIGH U pign gt 4V Quasi open collector with pull up against 15V no OT or OVP LOW U Low lt 1V At 15V at this output there will be max 1 5mA Short circuit proof against DGND Receiver U ow lt 1V U High gt 4V 2 CEECEE J UO N O w my m m Rem SB Note positive currents flow out of the analogue interface and negative currents flow into Al Analogue input DI Digital input requires a resistance set value at RSEL DO Digital output 3 only for Level A B operation requires to be enabled in the setup menu AO Analogue output 4 see technical specs Instruction Manual EL 3000 A Series Date 04 26 2011 Handling the device EN 9 Interface cards General The electronic load
43. 1hs 04 26 2011 2 2 EL3160 60A EL 3400 25A Uion Prom nom 1 2 115V 230V 50 60Hz MO 63A 0 160V 100mV lt 0 1 Of Unon 0 60A 10mA lt 0 2 of Iron 0 400W 0 1W lt 2 of Pron 0 10Q 10mQ 2 0 3 10 400Q 100mQ 2 0 3 lt 50us 2 2
44. any other regu lation mode than CV That s why it is not accessible in the manual operation in the CC CP or CR modes During remote control the voltage set value can be sent to the device but will be ignored and an access error will be reported by the communication During external control analogue interface there is an exception the voltage set value must be given and can be used as desired but should be set to OV if normal CC CP or CR operation is required CP means constant power Here are the set values of power and current adjustable In this mode the device withdraws as much current as neccessary from the feeding source in order to consume the adjusted power dependent on the input voltage P U I In case the input voltage is so low that the withdrawn current exceeds the nominal current of the device the adjusted power can not be achieved Simultaneously the current limitation becomes active The manual changeover to regulation mode CP can reset the set value of current to its nominal value and the set value of power to 0 if the parameter Keep set values has been set to no in the setup If set to yes the least adju sted set values are kept Also see 7 1 The setup menu CR means constant resistance The device features two resistance ranges For values refer to the technical specifications section The CR regulation mode is only active as long the switch Mode 2 is set to one of the two resistance ranges B
45. can be found in the user instruction manual of the interface cards Date 04 26 2011 About the device EN 2 2 Device specific data EL3160 60A EL 3400 25A Mains input Mains voltage 115V 230V switchable 115V 230V switchable Mains frequency 50 60Hz 50 60Hz Mains fuse M0 63A M0 63A DC input Input voltage Unom Input power Prom Input current lhom Overvoltage protection threshold max allowed input voltage Voltage control Adjustment range 0 160V 0 400V Display resolution 100mV 100mV Accuracy lt 0 1 of Unom lt 0 1 Of Unom Current control Adjustment range 0 60A 0 25A Display resolution 10mA 10mA Accuracy lt 0 2 of lhom lt 0 2 Of lhom Power control Adjustment range 0 400W 0 400W Display resolution 0 1W 0 1W Accuracy lt 2 Of Phom lt 2 of Phom Resistance control Adjustment range 1 0 10Q 0 40Q Display resolution 10mQ 10mQ lt 2 of resistance range lt 2 of resistance range 0 3 of range of current 0 3 of range of current Adjustment range 2 10 4000 40 8000 Display resolution 100mQ 100mQ lt 2 of resistance range lt 2 of resistance range 0 3 of range of current 0 3 of range of current Accuracy Accuracy Dynamic values Current rise and fall time lt 50us lt 50us Levels 2 adjustable levels per control mode 2 adjustable levels per control mode Times pulsed operation 2 adjustable 50us 100s 2 adjustable 50us 100s Rise Fall time adjustable 30us 200ms adjustab
46. required the set value input VSEL has to be tied to OV PSEL to VREF and CSEL can either be fed from an external 0 10V source or via a potentiometer GND and VREF slider to CSEL See also the table below Adjustable rise fall times and pulse widths like in the Level A B mode are not effective here If a certain form of amplitude time progression is favoured it has to be generated by an external function generator and fed in The trigger input Trigger In has no function when controlling the load via analogue interface External mode That means that set value leaps have to be generated with the signal that is fed in to the set value inputs 8 2 Example configurations Here you can find a table with example configurations for various single or combined regulation modes It ap plies that Pin 7 Remote always has to be pulled to OV DGnd and Pin 12 R Active only if resistance regulation is not used Explanation it is not necessarily required to give a fixed 10V to any non variable input It can of course also be a lower voltage in order to limit for example the power Best to tie the non variable inputs to VREF respectively to GND if required Voltage regulation aa var variable set value a which can be of course pulsed in order to emulate the Level A B operation H L High or Low for level see table Pin assignment of the analogue interface Instruction Manual EL 3000 A Series
47. supports various interface cards All are galvanically isolated up to 2000V The digital interface cards IF R1 RS232 IF C1 CAN and IF U1 USB support a uniform communication proto col The IEE GPIB card IF G1 uses a text based protocol according to the SCPI standard All cards can be used to monitor and control 1 to 30 units by a PC whereas the total number of devices using IEEE is limited to 16 by the bus standard Setup for the different cards The cards require different setup parameters that need to be configured at least once They are described in section 7 Device configuration Further information and technical specifications of the in terface cards can be found in their user instruction guide Specialties The control of the electronic load via one of the interface cards and the supplied LabView VIs follows the operating conditions and nominal values of the device Set values are checked for plausibility and are corrected if necessary or forced to nominal values LabView We provide ready to use LabView VIs for the interface cards These do not support all of the features of the electronic load but are constantly under development and enhancement New versions can be downloaded from the download section of the EA web page www elektroautomatik de Programming in other environments The implementation of the digital communication inter faces in other IDEs than LabView is generally possible The communicatio
48. with a power supply of the series PS9000 PSI9000 or with the additional analogue interface socket at the rear side controlled and monitored by any other device with an analogue interface The device is microprocessor controlled This results in an accurate and fast measurement and display of actual values as well as an extended operability by many new features which wouldn t be realisable with standard ana logue technology The modern design offers highest performance and enables space saving conceptioning of complex and efficient applications like for example industrial test equipment with variable powers for different demands or for demonstration and test purposes in the research and development area The digital control and the retrofittable interface card strongly simplify the connection to professional industrial bus systems like CAN Nearly all possibilities of the single systems are used With USB you can plug and use up to four or more devices to a standard PC without the need of additional hardware At CAN you can implement the devices into existing CAN bus systems without the need to reconfigure the whole bus system Address range and transmissions speed can be selected for the particular EL3000A unit so it fits best The main functions at a glance Set U I P and R each 0 100 Battery test with Ah and time count Pluggable interface cards CAN USB RS232 IEEE GPIB Ethernet LAN Analogue interface for extern
49. A Level B LevelB Level Controliz Ss 6 7 3 Level A B A B A B 11 12 A A 1t 50ys 100s 100hs 200s 10kHz 0 005Hz jE ROVPRPF ly E HERRA H TR BARE IKIRE MAK BIR EBV FRA DRT KE External trigger A B Level A B Trigger mode 7 internal external
50. Control 3 to position Level A B or Setup or by switching to a different regulation mode with Mode 2 Note if external control by analogue interface is activated pin REMOTE low while the battery test is running the test is aborted After external control has left again and if the switch Level Control is still in position Battery the test can be started again Time and Ah value are reset Note if the regulation mode is changed by Mode 2 all other set values that are not adjustable for the selected regulation mode are set to default values in order to let the test mode work correctly Hence the setting Keep set values is ineffective here Date 04 26 2011 Handling the device The example in figure 13 shows that the current of 45 5A can not be reached because the power limitation has become active 6 9 Alarm management The alarm management consists of two parts once the most recent alarm will be indicated and remaining on the display see figure 7 2 until it is acknowledged by the user and twice up to three different alarms are stored in an internal error buffer Since the first occured alarm is considered as important it is pushed to the end of the error buffer if more alarms occur but not overwritten If the buffer is full the last entry is overwritten by any recent alarm as long as the buffer is not read out by a command using a digital interface card Reading the buffer will empty it and also automati
51. Cooling The air inlets on the front and the air outlets at the rear have to be kept clean to ensure proper cooling Take care of at least 20cm distance at the rear to any surrounding objects in order to guarantee unimpeded air flow Caution Hot air can emerge from the air outlets 4 4 Disassembly Warning The unit must not be opened and repaired by the user When opening the unit or removing parts from the inside with tools there is risk of electric shock by dangerous vol tages Open the unit only at your own risk and disconnect it from the mains before Any servicing or repair may only be carried out by trained personnel which is instructed about the hazards of elec trical current 4 5 Temperature shutdown Ventilation The device is equipped with temperature controlled fans which are permanently running At higher temperatures the RPM will increase and result in a certain noise de velopment In case of overheating the device is automatically swit ched offline standby After cooling down to the allowed temperature range it is automatically switching online again The error remains indicated in the display until it is ack nowledged by using the Input on off button or read out by a remote command An internal error buffer stores up to three different alarms and is purged when read Date 04 26 2011 EN 4 6 Dynamic characteristics and stability criteria The electronic load is characterised by short ri
52. D CHED CHED CHD EE GED D CHED CHED CHD Netzsicherung amm Gp EP CHED CHED HHD Mains fuse Kartensteckplatz GED GD 3 GD CHED CHED Card slot ED Gl ED Ce G Dp Mains EE Gzip Gana CHD CHD CHD CHED CHED CHD CHED CHED CHED CHED CHED CHD TED CEED EED AFER Ee GD pb gt gt gt gt Mains input e Figure 2 Pin assignment of AUX terminal S positive Sense input S negative Sense input Gnd Ground of trigger output Tr Trigger output Leads out the pulse width determined internal trigger signal as a square wave which results from the settings in Level A B operation Instruction Manual E l EL 3000 A Series Date 04 26 2011 About the device 3 3 Scope of delivery 1 x Electronic load 1 x Printed user instruction manual 1 x Mains cord 4 General 4 1 Prologue Warning This user instruction manual and the device are intended to be used by users who know about the principle of an electronic load The handling of the device should not be left to persons who are unaware of the basic terms of electrotechnology because these are not described in this manual Inappropriate handling and non observance of the safety instructions may lead to a damage of the device or loss of warranty 4 2 Mains connection Grounding The unit is grounded with the mains cord Thus the unit may only be operated at a mains socket with grounding contact This must not be interrupted by an extension cable without earth conductor 4 3
53. abri wehunauense 34 6 ISSUE 35 6 6 Thebattery lest mode siusis dione a EAEE AEEA 35 o AA aa e T aE E EE E A EEN 36 6 10 Control locations and priorities pp 36 6 11 Series and parallel CONMECU ON se 36 fe DEVICE COMMG OFAN ON ee er oe or oo R dente lend staves E E teasers nvedseaveue iced 37 Al The Setup mMenu sesanan aaa a E E R a A EE E a SE E E E A EE A EA A A E AEE 37 8 DHE analogue nterace sm a na a A a 38 ol O GE 38 02 Examble eonlguralone laces i 38 8 3 Sample applications pp 39 8 4 Pin assignment of the analogue interface pp 40 Ds WNW AC SCM NS ascot hs A ec sete A E E T a dua T EA 41 I NSO UN ONS cre 0 42 10 1 Accessories and OptioNS ee 42 10 2 Firmware Updates pp 42 Instruction Manual EL 3000 A Series Date 04 26 2011 About the device EN 1 Introduction The electronic loads of the series EL3000A are very effici ent devices which offer a big variety of interesting features at a small form factor Besides the common functionality of electronic loads you can test batteries load voltage or current sources with a pulsed operation where the pulse widths and the amplitude are adjustable Or you can remotely control the device via an interface card and control and monitor nearly all its features from a PC The integration into existing systems is made easy by using one of the interface cards the configuration is intuitive and is done at the device The electronic loads can thus be operated in conjunction
54. al control Pulsed operation between two set values with adjustab le pulse widths and adjustable rise fall time Adjustable duty cycle as time of 50us 100s and adjustable rise time of 30us 200ms 160V at 60A or 400V at 25A and 400W Instruction Manual EL 3000 A Series 2 Technical specifications 2 1 Control panel Type Display two line character LCD with 80 characters Operating elements 2 rotary knobs 2 rotary switches 1 pushbutton Display formats The nominal values determine the adjustable range Actual and set values are displayed all at once as long as the currently active operation mode allows it Display of voltage values 4 digits 0 0V 999 0V Resolution Formats Display of current values 4 digits 0 00A 99 99A Resolution Formats Display of power values Resolution 4 digits Formats 0 0W 999 9W Display of resistance values Resolution 4 digits Formats 0 00Q 99 99O 0 00 999 90 Display of time The elapsed time only battery test mode is display in the format Hours Minutes Seconds HH MM SS Resolution 1s Range 1s 99h 59m 59s 99 59 59 This time stamp can be read out via one of the pluggable interface cards together with the pulse widths and rise time of the dynamic Level A B operation The dynamic values can also be set remotely In order to do so the time format has been extended so it can represent 1Hhs up to some years Detailed information about this
55. and then to the power set value etc when rotating clockwise Counter clockwise rotation moves the arrow in reversed order In level A B mode or in the setup menu are multiple menu pages selectable This is indicated by two little triangles at the right side of the display pointing up and down If all pages and menu elements are through the navigation cycles to the first resp to the last page Date 04 26 2011 31 Handling the device Rotary knob Setting 6 This rotary knob has no end stop With every position Setting 6 changes the set value resp the parameter in the setup menu which was chosen before by Selection 5 Setting oo It applies the faster the knob is rotated the faster the set value is increased or decreased the step width changes Slow rotation hence changes the set value in small steps while fast rotation changes it in big steps In case the upper or lower limit of the set value is reached while rotating the set value will remain at its limit until it changed again by rotating the knob in the opposite direction 6 3 Switching power on The device is powered by switching the mains switch After powering the device type and firmware version are shown on the display After the internal system has booted and performed some tests default set values are set The load s DC input will always be offline after the first start If the setting Keep set values is set to yes then the most re
56. are for example the current and the power because the set value for resistance is only available in resistance mode and the voltage value must be set to zero in constant current mode See figure 9 on the next page The set value of this mode is kept unchanged until it is adjusted again even if the load is switched to Level B AIB or Battery test This does not apply if the parameter Keep set values has been set to no see 7 1 The setup menu Then the set value is reset to certain default va lue depending on the currently active regulation mode also see 6 6 Preselecting the regulation mode In Level A mode the load can be switched to remote control from a PC and via the interface in order to control and monitor it like during manual operation When changing to remote control the currently selected Level Control setting is kept Date 04 26 2011 Handling the device 6 7 2 Level B When selecting Level B with the selector Level Con trol 3 the load is switched to manual operation This mode works the same way as Level A with the difference that the set values of Level B are used now and instantly set after switching In Level B mode the load can be switched to remote control from a PC and via the interface in order to control and monitor it like during manual operation When changing to remote control the currently selected Level Control setting is kept 6 7 3 Level A B pulsed operation This mode co
57. are version and an update tool for Windows which will per form the update In order to do an update either a card of type IF R1 IF U1 or IF E1 is required Other interface card types will not work for firmware updates Note not all older firmwares can updated to the most recent version because it might be necessary to upgrade the hardware too Contact your supplier for details Instruction Manual EL 3000 A Series Date 04 26 2011 EA Elektro Automatik GmbH amp Co KG Helmholtzstra e 31 33 41747 Viersen Tel 49 0 2162 37 85 0 Fax 49 0 2162 16 230 ea1974 elektroautomatik de www elektroautomatik cn
58. cally acknowledge alarms indicated on the display The error buffer stores an error code and a status code for every of the three possible entries telling the user if the alarm is still active or already gone More informa tion is contained in the user instruction manual of the interface cards The display also indicates the status of the indicated alarm The reason is to tell the user that one or multiple alarms have occured during his absence especially if the alarm only lasted for a very short period of time like overvoltage caused by spikes The user has to either acknowledge that he has noticed the alarm indication by pressing the Input on off 4 button or by reading the error buffer via communcation Note Alarms that occur during remote or external control are not indicated on the display because of the control mode status indication Thus they only need to be ack nowledge when leaving those modes or not at all if the error has been read before by command Date 04 26 2011 EN Control locations are the locations from where the device is controlled This can be at the device manual control via the analogue interface external control or via a di gital interface card remote control In order to prevent the user from accessing the device from two locations at once there are priorities Following applies 6 10 Control locations and priorities The analogue interface has the highest priority the digital interface
59. ce in order to distinct between mutliple devices in a network and to address it correctly 30 addresses are available which means that up to 30 devices can be con trolled from one PC Every address must only be given once in a system of connected devices Keep set values Possible settings yes no Default setting yes Belongs to Device Explanation yes defines that the set values which are adjusted by the user are kept when switching the regu lation mode also see 6 6 Preselecting the regulation mode while no defines that the set values are always reset to default values when switching EL 3000 A Series Instruction Manual 3 gt CAN Baud rate Possible settings 10kBd 20KBd 50kBd 100kBd 125kBd 250kBd 500kBd 1MBd Default setting 100kBd Belongs to CAN interface card IF C1 Explanation determines the baudrate transmission speed of the CAN bus If you connect the CAN card to an existing network you got to set the same baudrate here as the bus is using becaus any device in a bus has to use the same bus speed CAN Relocatable ID Possible settings 0 31 Default setting 0 Belongs to CAN interface card IF C1 Explanation this determines the relocatable address segment in which the device node of the CAN is located For further information refer to basic CAN topology datas heets Example if the electronic load has to be assigned to address 5 by certain reasons and this would collide with anot
60. cent set values are restored when switching the unit on 6 4 Switching the DC input on off By pressing the pushbutton Input on off 4 the DC input of the load input is switched on and the device starts to work as a load Pressing the button again switches the input off The input can also be switched off with the pin named REM SB on the analogue interface pin low if is was on before Switching the input on if it was off before is not possible While the load is working all four actual values of current voltage power and resistance are indicated on the left half of display When the load input is off only the actual value of vol tage is indicated because there are no reasonable other actual values available at this moment In battery test mode the time counter is also halted resp continued if the pushbutton is pressed The activation of the load operation can be inhibited by certain reasons For example if an overvoltage or another error is persistent or the load is remotely controlled by the analogue or digital interface interface card The standby state input off is displayed like this Date 04 26 2011 EN Note Set values which must not be changed in the cur rently selected regulation mode are not shown and can not be selected changed 6 5 Adjusting the set values Set values can be selected and adjusted as long as the display does not show the status texts External mode or Remote mode a
61. ch of them A and B has five set values dedicated to the four regulation modes That means that the set value of current is dedicated to constant current mode etc and is represented by the values of Aor B In CP mode you can for example adjust two set values for power switch between them and generate power leaps When using the A B mode see 6 7 3 this switchover happens automati cally in combination with the adjustable pulse widths i e pulse times of A and B This generates a square wave shaped set value whose high level is represented by the A value and whose low level by the B value and whose period time and thus frequency by the sum of the vari able pulse widths of A and B These also determine the so called duty cycle An example A 10ms B 90ms this results in a period time of 100ms 10Hz with 10 duty cycle Also see also figure 11 6 7 1 LevelA When selecting Level A with the selector Level Con trol 3 the load is switched to manual operation but this is only possible if the status in the display does not show Remote mode or External mode After switching to Level A mode the display shows Level A An arrow gt is placed next to the set value which is dedicated to the currently chosen regulation mode in order to be instantly adjustable The set value s can be selected with Selection 5 and changed with Setting 6 Which set values are selectable depends on the regulation mode In constant current mode these
62. d at the rear side Fur ther information about the interface cards can be found in section 9 Date 04 26 2011 Handling the device 6 Handling For an overview of all operating elements also see sec tion 3 1 6 1 The display This is an overview of the two line display and its layout The left side always shows actual values while the load input is switched on Istwerte und Regelungsart Actual values and control mode Istwert Leistung Actual value for power Istwert Spannung Actual value for voltage Indikator Regelungsart Indicator regulation mode Istwert Widerstand Actual value for resistance Istwert Strom Actual value for current Figure 3 The indicator for the regulation mode a triangle appears next to the actual value which is related to currently active regulation mode of the load This can differ from the chosen regulation mode if a nominal value has been exceeded The current or power limitation have priority over the voltage or resistance limitation here That means that the load will change into constant current limitation as soon as the nominal current value has been reached The triangle will indicates it In standby load input off the status Standby is displayed and only the actual value of voltage is shown Figure 4 Various texts in the right half of the display indicate diffe rent operation modes or errors Figure 5 This text appears if the load was set to remote control op
63. e Gerates EN 7 Device configuration 7 1 The setup menu The setup menu can activated anytime by the selector Level 3 except during remote control mode by interface card or external mode analogue interface While the load is in setup no normal load operation is possible The display shows a certain number of parameters depending on which interface card is installed The pa rameters are selected by Selection 5 and changed with Setting 6 Two small triangles on the right side of the display indicate that multiple parameters are available The display furthermore shows the type string of the installed card in the first line for example IF U1 if one IS equipped The second line subsequently shows all parameters which are selected by Selection 5 The number of parameters varies according to the equipped interface card The following overview lists the possible parameter and its settings Lard Four ass a sis mas mma Bap eg OE sa sees a Figure 14 Trigger mode Possible settings internal external Default setting internal Belongs to Device Explanation defines if the trigger signal for the Level A B operation which effects the change between A and B is automatically generated by the device internal or if it s put in by the trigger input external Device node Possible settings 1 30 Default setting 1 Belongs to Device Explanation defines the device node or address of the devi
64. either active or happened Example Figure 7 2 Only the least occured alarm is indicated but up to three different alarms are stored in an internal error buffer which can be read out via a digital interface card using a specific command This also resets the display and purges the buffer Instruction Manual EL 3000 A Series Handling the device 6 2 Operating elements Power Mains switch Power 1 Is used to switch the device on or off CP Selector Mode 2 Is used to preselect the regulation mode in which the device shall work The different regulation modes effect each other if nominal values of the device are reached and then limited This can for example lead to a do minance of the constant power control CP even if the constant current control CC is set as active mode The currently active regulation mode is indicated in the display More about the different regulation modes in section 6 6 Preselecting the regulation mode Following regulation modes are selectable CC Constant current regulation CV Constant voltage regulation CP Constant power regulation CRior Constant resistance regulation in range 1 CRaor Constant resistance regulation in range 2 the shown range values are examples The switchover of the regulation mode switches the load input off and the set value that is related to the currently chosen regulation mode is addressed for adjustment arrow in front of the value
65. er signal which is fed into the trigger input The trigger signal must be square wave for levels see 8 The analogue interface As long as external trigger is active the pulse times of A and B are not indicated in the display and are also not adjustable anymore The display also indicates the status with Ext trigger active The rotary knob Selection 5 is used to select the set values for A and B as well as both pulse times and Setting 6 is used to change them The display shows the letters A and B to indicate the assignment When navigating between the set values an arrow gt is placed in front of the currently selected one A rise fall time for the pulsed operation is also adjustable Both rise and fall time are identical and can t be set seperately for A and B It is displayed as slew rate in the format Avalue Atime like for example in figure 10 with 60A 20ms The Level A B operation is started as soon as the load input is set to on periodischer Sollwertverlauf periodic set value run Level A Level B Pulsbreite von B pulse width of B Pulsbreite von A pulse width of A Periodendauer Frequenz penodic time frequency Figure 11 Lt EEE EEE LT a E LF i l x i H l l f i l 5 Bas 7 I I I e S ea Lin Lin iii Lily ml Instruction Manual EL 3000 A Series Handling the device Note during Level A B operation following applies the set value of A must alwa
66. eration Remote mode via the optional interface card This is possible in the modes Level A B and A B e eE Pal moogde Figure 6 The text External mode indicates that the control of the load was switched to the analogue interface The set values can not be adjusted at the device anymore in this mode For detailed information see section 8 The analogue interface Date 04 26 2011 aktueller Sollwert active set value Unterspannungsschwelle Under voltage threshold EN Sollwerte Fehler und weitere Messwerte Set values errors and further values Beispielanzeige Batterietestmodus Example display of battery test mode entnommene Kapazit t consumed capacity Zeitzahlung Time counter fs J me nmp eae 3 L z eem i ee Figure 7 1 The texts Overvoltage or Overtemperature indicate the status of an error An overtemperature error occurs if the load gets over heated The load input is switched off and remains as long the error is persistent After cooling down it switches automatically on again An overvoltage error is indicated if the overvoltage limit for the DC input has been exceeded see 2 2 Device spe cific data This error switches the load input permanently off After removal of the cause it can be put online again Alarm management Error indications remain in the display until acknowledged by the Input on off button The purpose is to inform the user that an alarm is
67. g a voltage source or battery as well as when using the analogue interface e The DC input is not fused Instruction Manual Date 04 26 2011 EL 3000 A Series Table of contents EN Page T ANU CUNT OT cease E E E E era epee wate occa AR 25 2 echincalsbechoalons a ean 25 OU EL 25 2 2 Device specific data 4 26 30 DEO A E E A E E E E sats 27 Sn 27 Re 27 COS Ol I ira create bein e i E EAEE ANE E R AE a E EE Eia Ea 28 doenelal me ee TAE ee AE E ee E eee 28 Al Prologue War 28 A42 Mains connection Groundihg so a ainaad aE E 28 0 28 DISassembly 0 a eE 28 4 5 Temperature Shutdown Ventilation nn 28 4 6 Dynamic characteristics and Stability criteria ccc cceccccseeeceeeeeeeeeceeeeeseeeeseeeseeeeseeeeseseseueeseneesseeenseeeess 28 SLS 29 5 1 VISual chneckK ee 29 we WANS CONOCIO ees Sas nares AE E EE E pcecenet E seine dane EE EEE E E AE EEE ES 29 Do ermmelD I ee E E E ET E E E O ET 29 5 4 Terminal AUX remote sense pp 29 Seelacswan so 29 omni 30 ON 30 OZ ODErAUNG CIGMICINS me en EE EE EEA AE EE EE EEEE O REEE EEN 31 O25 SWINGING PON E om pE E E E E E EEEE E a E E EE E 32 6 4 Switching the DC input on off cc eccceceeeeeeseeeee see eeeseeeeeeeeeeeeaeeeeeseeeeesseeeeeseaeeeseeeeesaeeeeseeeeesaaeeesaaeeeenaes 32 6959 AduUsing ihe Se valles dete a aA 32 6 6 Preselecting the regulation mode pp 32 6 7 Usage of Level A and Level ns 33 Go JE 33 DEV 34 6 7 3 Level A B pulsed operatlon 0000 aaia
68. her bus member with the same address you can move the address to another segment by defining the RID short for relocatable ID so that no collision can occur Hence there are theoretically 32 x 30 possible device nodes available when using CAN CAN Bus terminate Possible settings yes no Default setting no Belongs to CAN interface card IF C1 Explanation defines if the bus termination resistor on the CAN interface card is active or not This is only required if the CAN card is in that particular device which is located at the end of a CAN bus By setting this parameter to yes the resistor is activated no deactivates it In case you don t want to use this feature and instead want to install a custom resistor for bus termination make sure that this setting is set to no RS232 Baud rate Possible settings 9600 Bd 19200 Bd 38400 Bd 57600 Bd Default setting 57600 Bd Belongs to RS232 interface card IF R Explanation determines the baudrate transmission speed of the serial data transmission when using the serial RS232 interface card IF R1 Make sure that the other end of the serial connection operates at the same baudrate Date 04 26 2011 37 Handling the device 8 The analogue interface Introduction The analogue interface is a 15pole Sub D socket and is located at the front side It is designed to externally con trol the most important functions of the electronic load by external hardware eg PLC switche
69. ill constantly changing and are not strictly assigned to level A or B and could thus also be measured during rise or fall 6 7 4 Rise fall time The rise and fall times are equal and are thus considered as one value Also see figure 10 It is continuously ad justable in a range of 30us 200ms The step width is changing from us to ms over the whole range The error lies at max 10 The time is displayed as slew rate in the format Avalue Atime Example the set value of A has been set to 40A and the one of B to 20A then a current leap of 20A is generated in a time x for instance 100ms The display then shows 20A 100ms The delta value is not adjustable at this point Instruction Manual EL 3000 A Series EN Note the pulse widths of A and B should always be gre ater than the rise fall time else the pulsed signal would result in triangle shaped wave form or something else For example a pulse width of 100ms for A and B and a rise fall time of 100ms creates a triangle shaped signal with a period time of 200ms This might be wanted in certain applications and is thus not limited or influenced by the device 6 8 The battery test mode Introduction The battery test mode enables the user to connect a bat tery to the load and discharge it definedly The average current is measured and the elapsed time is counted and then display as the consumed battery capacity in Ah The voltage supervision together with the adjustable under v
70. ion 5 Selection gt Level A B Setting 6 x Selection 5 Keep set values yes
71. ith a Sub D plug which is used to control the analogue interface wire all necessary connections and check the hardware for not supplying gt 10V respectively not more than the specified value The constant resistance regulation requires all four set values U I P R to be fed in If it s not used three set values U und P are sufficient If the constant resistance regulation is not used it has to be deactivated by putting a jumper from Pin 12 R active to Pin 6 DGND Pin 12 Low Resistance regulation inactive Pin 12 High Resistance regulation active Date 04 26 2011 EN If resistance regulation is used you can select the resistance range before or while using the analogue interface Pin 13 R Range is used to switch between the two ranges Pin 13 Low Resistance range 2 is used Pin 13 High Resistance range 1 is used default The input Rem SB Remote Standby Pin 8 overlays the pushbutton Input on off 4 That means that you can switch the load input off or on with this pin at any time even if the load was not set to external control via the analogue interface and as long as this pin is tied to OV ground the load input will be permanently off and can not be set to on with the pushbutton Input on off 4 or via remote control by an interface card The output VREF can be used to generate set values for the set value inputs VSEL CSEL PSEL and RSEL For example in case that only CC regulation is
72. le 30us 200ms Accuracy lt 10 lt 10 Trigger input yes for external level switching yes for external level switching Battery test feature Modes Current Power Resistance Current Power Resistance Battery protection Discharge threshold voltage adjustable Discharge threshold voltage adjustable Display Time and comsumed battery capacity Time and comsumed battery capacity Display 2 x 40 characters illuminated 2 x 40 characters illuminated Analogue interface Set value inputs 0 10V for U 1 P R 0 100 0 10V for U 1 P R 0 100 Monitor outputs 0 10V for U I 0 100 0 10V for U I 0 100 Control signals internal external Input on off R Mode 10 4000 internal external Input on off R Mode 40 8000 Error signals Overvoltage Overtemperature Overvoltage Overtemperature Outputs Reference voltage Reference voltage Cooling Type Temperature controlled fans Temperature controlled fans Ambient temperature 0 70 C with derating 1 C above 30 C 0 70 C with derating 1 C above 30 C Terminals Load input Front side safety sockets Front side safety sockets Sense input Rear side 4pole screw clamp Rear side 4pole screw clamp Trigger output Rear side 4pole screw clamp Rear side 4pole screw clamp Analogue interface Front side 15pole Sub D socket Front side 15pole Sub D socket Dimensions W x H x D 240 x 120 x 300mm 6kg 6kg Article number 35 320 200 35 320 201 CAN USB RS232 GPIB Ethernet CAN USB
73. mbines two set values A and B with two seperately adjustable pulse widths times for A and B This results in a period time and the generated signal produces automatic set value leaps between the two set values of A and B The rise fall time of the set value leap is also adjustable This pulsed operation is only applied to the set value which belongs to the chosen regulation mode the other set values remain constant Also see figures 11 and 12 The pulse time of A is dedicated to the set value of A etc The sum of the pulse times results in a period time t which represents a certain frequency f 7 t The pulse times are adjustable from 50us 100s which results in a time of 100us 200s which corresponds to a frequency of 10kHz 0 005Hz Note Alarms like OVP or PF power fail which switch off the input also stop the pulsed operation It can be resumed as soon as all alarms are gone and have been acknowledged Date 04 26 2011 EN The external switchover between A and B realised with the trigger input analogue interface is only available in Level A B mode The trigger input has to be activated in the setup menu with the option Trigger mode see 7 Device configuration The default setting is internal By setting it to external the switchover between A and B can only be done via the trigger input External trigger The adjusted rise fall time is still effective here but the pulse widths are now determined by the trigg
74. n protocol follows no certain standard and represents only the lowest level of the communica tion At this level it provides lower safety against wrong setup and wrong set values which may lead to a misbe haviour of the addressed unit A strict adherence of the guidelines is mandatory Details about the communication protocol can be found in the user instruction guide of the interface cards Application examples The following figures show only some of many possible applications when controlling one or multiple electronic loads by a PC The same applies for mixed configurations with power supplies The configuration shown in figure 23 can also be used for RS232 with the interface card IF R1 Instruction Manual EL 3000 A Series Ea gt m USB Hub Figure 22 Figure 23 Date 04 26 2011 41 Handling the device EN 10 Miscellaneous 10 1 Accessories and options Note Details about options and accessories are avaible In seperate user guides Following accessories are optionally available a USB to Analogue interface UTA12 Galvanically isolated remote control via USB on PC side and the device internal analogue interface b Digital interface cards Pluggable and retrofittable digital interface cards for USB RS232 CAN GPIB IEEE SCPI only or Ethernet LAN SCPI are available 10 2 Firmware updates lf a firmware update becomes necessary it can be done by the user Upon request we supply a new firmw
75. oltage shutdown threshold Ulow prevents the battery from being deeply discharged This threshold needs to be adjusted at least once If it is exceeded during the test the load input is automatically switched off and the time counter is halted No more current is drawn from the battery If the threshold is set to greater than the battery voltage the test can t be started Selecting regulation mode The regulation mode can be changed anytime Doing so will reset the whole test time counter and Ah value Usage Before and during the test you can adjust the set value of the pre selected regulation mode CC CR or CP and the undervoltage shutdown threshold Ulow The value to set is selected with Selection 5 and adjusted with Setting 6 The displays shows the elapsed test time in the format Hours Minutes Seconds HH MM SS as well as the consumed capacity in Ah Calculation of the Ah value The ampere hours value withdrawn electric charge is calculated from the average of the last two measurings of the input current and the elapsed time Start pause stop the test The test ist started by pushing the button Input on off 4 and either stops after 100 hours are counted or the battery voltage exceeds the undervoltage threshold Another press of the button Input on off 4 during the test halts it another push will continue the test A reset of the time counter is done by leaving the battery test mode by switching the selector Level
76. ome BES KEH RARA Bit W RERE r Z gt ad At rt ITT AYE A AE BMT F HLT SIMS ES HK Standby a s L yl 4 Pe Cf oad bed ane ae aa eel i l ama pami gg oe nh fee CELI 5 Remote mode Level A B A B 6 External mode 8 04 26 2011 DE s ma uE ee a ss m PR be i Leni feed Ext I Bi pm im ob ee G y aM Li h iri i Cast eLA bs 7 1 Overvoltage Overtemperature
77. operation only the slave s have to be switched to external control The switch over is realised with either a relay or a switch etc REMOTE DGND Figure 19 External control with current and power The example in figure 20 shows potentiometers one each for the set value of power and current which are referenced to VREF 10V and AGND With this you can arbitrarily adjust current and power between 0 and 100 Voltage set value VSEL and signal R active tied to OV here for correct operation Figure 20 Date 04 26 2011 39 Handling the device EN External control with current only Like in the example above but only current adjustable The power is set to maximum DGND Figure 21 8 4 Pin assignment of the analogue interface RE Type Desai VSEL N Servae forvotage 010V corresponds 10 0 100 oFU van curacy typically 0 1 0 10V corresponds to 0 100 of Nom Input impedance Ri gt 40k 100K POT Reference potential for analogue For VSEL CSEL PSEL RSEL VMON CMON signals PMON and VREF Reference potential for digital signals Selection internel external External LOW U Low lt 1V U range 0 30V ee Internal HIGH U pign gt 4V or open max 1MA at 5V Load input on off OFF LOW U iow lt 1V U Low to High typ 3V a ae ON HIGH U pign gt 4V or open Sender open collector against DGND VMON Actual value of voltage 0 10V correspond to 0 100 of U Nom Accuracy typically 0 1 at
78. oth ranges act the same way they only differ in the higher resolution and accuracy of the lower resistance rang e In this mode the set values of resistance current and power are adjustable This regulation mode loads the feeding voltage or current source so much that the adjusted resistance results from the relation of input voltage to input current R U I In case the input voltage is so low that the input current ex ceeds the nominal current value the adjusted resistance can not be achieved Simultaneously the current limitation becomes active If the product of input voltage and input current the power exceeds the nominal power of the device the power limitation becomes active Then the adjusted resistance can also not be achieved Instruction Manual EL 3000 A Series EN The manual changeover to regulation mode CR can reset the set values of resistance current and power to their nominal values if the parameter Keep set values has been set to no in the setup If set to yes the least adju sted set values are kept Also see 7 1 The setup menu 6 7 Usage of Level A and Level B Introduction The names Level A and Level B stand for two different sets of set values which can be switched over This is either done manually with the selector Level Control 3 resp externally via the analogue interface with the trigger input only in A B mode Or automatically A B mode in order to generate a voltage leap Ea
79. ow 2 Pin 13 High 1 Rem SB 8 Input on off 4 0V Input on off 4 VREF VSEL CSEL PSEL RSEL CC VSEL OV 0 10V GND VREF CSEL PSEL VREF CSEL e Level A B PR BAC AE a hE AAA o External mode TK 8 2 7 125 0V
80. rce is able to deliver the current The set value of power is additionally limitting the consumed power and effecting the maximum current The power limitation is dominant over the current limitation The manual changeover to regulation mode CC can reset the set value of power to its nominal value and the set value of current to O if the parameter Keep set values has been set to no in the setup If set to yes the least adjusted set values are kept Also see 7 1 The setup menu CV means constant voltage Here are the set values of voltage current and power adjustable In this mode the input voltage is limitted to the adjusted set value by loading the feeding source so much that its output voltage collapses If the feeding source is able to deliver more current than the device is able to withdraw then the vol tage limit can not be achieved Instruction Manual EL 3000 A Series Handling the device The manual changeover to regulation mode CV can reset the set values of voltage power and current to their no minal values if the parameter Keep set values has been set to no in the setup If set to yes the least adjusted set values are kept Also see 7 1 The setup menu Note the CV regulation can not be used in combination with the battery test mode Selecting it for battery test will indicate an error message on the display Note the voltage set value which is assigned to the regulation mode CV must be set to 0 in
81. s relays The load requires to be switched to external control in order to use the analogue interface This is done by connecting Pin 7 Remote with ground Pin 6 by a jumper or switch The status is then displayed like this ae ET HLL Erb sa 1 ey Ree oP peL Figure 15 Avoid switching the load to external operation while running it in remote mode interface card or battery test Switching to external control can be done in any situation except setup menu active Eventually active remote con trol or a running battery test are aborted and the control location is set to local Priorities The analogue interface has priority over any other ope ration mode Hereby the set value inputs are activated and the set values for the load can only be adjusted from external by means of an external voltage source PLC 0 10V application or potentiometers See table 8 4 Pin assignment of the analogue interface for an overview of the inputs Additionally the control via the interface card is blocked in this mode but actual values can be read with it i e monitoring 8 1 Important notes For pin assignment see 8 4 Pin assignment of the ana logue interface Caution The inputs are not protected against overvol tages Higher voltage than specified in section 8 4 on any input of the analogue interface may damage the device Please read and follow these instructions carefully Before connecting the hardware w
82. se and fall times of the current which are achieved by a high bandwidth of the internal regulation circuit In case of testing sources with own regulation circuits at the load like for example power supplies a regulation instability may occur This instability is caused if the com plete system feeding source and electronic load has too little phase and gain margin at certain frequencies 180 phase shift at gt OdB amplification fulfills the condition for an oscillation and results in instability The same can occur when using sources without own regulation circuit eg batteries if the connection cables are highly induc tive or inductive capacitive The instability is not caused by a malfunction of the load but by the behaviour of the complete system An impro vement of the phase and gain margin can solve this In practice a capacity is directly connected to the DC input of the load Recommended is 1uF for slower systems some 100uUF can be necessary The regulation circuit is physically unable to regulate the internal resistance to 0 which also prevents maximum input current at very low input voltage See the illustra tions below for clarification The first one depicts that at least 1 7V input voltage is required for maximum current Resistance regulation U ratio In IN A 60A load Measurings EL3160 60 60 Current Voltage 45 60A 1 35V m 45A 0 97V 30A 0 63V 45 15A 0 32V 0 5 1 1 5 U NV Resistance regula
83. that one of them may be grounded if necessary Attention When grounding one of the input poles always check if one of the output poles of the source eg power supply is also grounded This could result in a short circuit Attention Notice the potential shift of the input poles when using series connection Grounding is hereby only recommended at the pole with the lowest poten tial against ground Instruction Manual EL 3000 A Series EN The remote sense feature is wired at terminal AUX 5 4 Terminal AUX remote sense In order to compensate voltage drops over the load cables max 1 1V per line between feeding source and consumer the load can measure the voltage at the source via the remote sense input poles at the terminal AUX and regulates accordingly The connection is done with correct polarity at the rear side of the device at the terminal AUX at pin 1 Sense and pin 4 Sense Recommended cross section 0 2mm 2 5mm flexible wire with cable end sleeves Sense must only be connected to output and Sense must only be connected to output of the feeding source Else both device might get damaged The terminal also leads out a trigger signal via the pins TRIG and GND More information about the trigger signal in section 6 7 3 Level A B pulsed operation 5 5 Interface card slot The unit can be equipped with an optional interface card The slot to insert the card is locate
84. the second highest one and the manual control the lowest one It means that if the device was set to re mote control modes and set values can t be set with the switches and rotary knobs anymore If the device would be switched to external control while remote control is active the remote control status would be reset and the device would only be controllable via the analogue inputs In order to report this to a software running on a PC still trying to access and control the device the control loca tion is internally set to local In local status the device can only be read i e monitored by the PC 6 11 Series and parallel connection Series or parallel connection of multiple loads is basical ly possible but it is not explicitely supported It means there is no automatic distribution of the current at parallel connection respectively of the voltage at series connec tion The user has to take care of the correct control of the devices When using parallel operation the symmectric distribution is achieved by adjusting the same set values for U P and R at any device via the control panel or the interface card Attention At series connection the total voltage must not exceed 420V and the voltage per device not its nominal value see 2 Technical specificati ons Thus no series conection of 400V models is allowed because of security and isolation reasons Instruction Manual EL 3000 A Series Handling th
85. tion U l _ ratio In IN I A 25A load 25 D Measurings EL3400 25 15 Current Voltage 25A 0 95V 10 20A 0 74V 10A 0 36V 5A 0 18V 0 5 1 1 5 U N Instruction Manual EL 3000 A Series About the device 5 Installation 5 1 Visual check After receipt the unit has to be checked for signs of phy sical damage If any damage can be found the unit may not be operated Also contact your dealer immediately 5 2 Mains connection The mains connection is done with the included mains cord The plug is a 10A mains plug after IEC 320 The mains cord has a length of about 1 5m and a cross section of 3 x 0 75mm The unit is fused with a 5 x 20mm safety fuse M0 63A which is accessible at the rear side 5 3 Terminal DC input The load input is located at the front side of the device The connection to any feeding source is done here by Buschel plugs or screw amp clamp Always take care for correct polarity Only DC voltages allowed The input is not fused In order to prevent damages by the feeding source always observe the nominal values of the electronic load If necessary install an extra fuse between load and source especially when discharging batteries The cross section of the load cables depend on the cur rent input We recommend to use for up to 60A for up to 25A per cable flexible wire 2 x 6mm or at least 1 x 16mm 2 x 1mm or at least 1 x 4mm The inputs und are not grounded so
86. tween level A and B Battery Switches the load offline and activates the battery test mode Setup Switches the load offline and activates the setup menu Here the device and the interface card if equipped are configured More about the operation modes on section 6 7 Usage of Level A and Level B Pushbutton Input on off 4 This button is used to activate or deactivate the load operation Input on off Ea In battery test mode the time counting is also halted if the button is pressed and the load is set to offline Or it is continued if it is set to online The activation of the load operation can be inhibited by certain reasons For example if an overvoltage or another error is persistent or the load is remotely controlled by the analogue or digital interface interface card In remote operation i e control via a digital interface card the button can be used to forcibly reset from remote operation by pressing it for gt 3s Rotary knob Selection 5 Selection This rotary knob has no end stop With every K position Selection 5 selects another ele ment in the display resp another parameter in the setup menu An arrow gt is placed in front of the selected element parameter The selection order is when rotating clock wise top left gt bottom left gt top right gt bottom right That means if the arrow is pointing to the voltage set value it will be moved to the set value for current
87. ys be greater than or equal to B Thus you can adjust A downwards only to the value of B and B upwards only to the level of A If it seems that Level A is not adjustable somehow this might be caused by Level B being the same value periodischer Sollwertverlauf periodic set value run Level A Level B Pulsbreite von pulse width of B Pulsbreite von A pulse width of A Periodendauer Frequenz penodic time frequency Figure 12 Figure 12 shows a possible progression of a set value U I P or R with adjustable pulse widths and variable amplitude The rise fall time is also adjustable but is equal for A and B If the rise fall time is set to minimum the signal of the pulsed operation is a nearly ideal square wave Figure 12 is only a clarifying view The real progression of for example an input current which is pulsed with a frequency of 1kHz will differ more or less It depends on many circumstances like the regulation time of the feeding power supply the regulation time of the load line impedances etc In pulsed operation the actual values are also pulsing and the values constantly change in the display so they are not clearly readable Thus the actual values are now only indicated at pulse times gt 1s A and B each and can be read quite clearly by looking at them Internally the actual values are measured much more often every few milliseconds They can always be read via an interface card but they are st
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