ANALOG DEVICES 3B39 handbook
Contents
1. Stability vs Temperature 25 ppm of Span C 25 ppm of Reading C 5 of Span Noise 0 2 uV rms 50 uV rms 3 Hz 2 ms Common Mode Voltage CMV 1500 V peak maximum ANSI IEEE C37 90 1 1989 Common Mode Rejection CMR 90 dB Output Protection 220 V rms maximum ANSI IEEE C37 90 1 1989 Power Supply Voltages 11 5 V dc to 16 5 V dc 10 mA 0 01 span V 12 V dc to 30 V dc 27 MA lout 20 MA Rev 0 Page 3 of 8 htt p ww BDN C conh AD Sensitivity 0 0002 span V Mechanical Dimensions 3 15 x 3 395 x 0 775 80 0 mm x 86 2 mm x 19 7 mm Environmental Temperature Range Rated Performance 25 C to 85 C Storage 55 C to 85 C Relative Humidity 24 hours 0 to 95 60 C noncondensing RFI Susceptibility 0 5 Span error 400 MHz 5 Watt 3 ft 1 Input and Output Range may be selected using jumpers supplied Includes the combined effects of repeatability hysteresis and nonlinearity 3 24 V dc loop power is required for driving the current output at loads up to 850 If a current output load of 400 or less is applied 15 V dc is sufficient for loop power If only voltage output is used loop power is not required Specifications subject to change without notice Rev 0 Page 4 of 8 htt p www BDI C conh AD PIN CONFIGURATIONS AND FUNCTIONAL DESCRIPTIONS 4 20 mA OR BOTTOM VIEW 0 20 mA ee co e ee 33 wena EA 277 Q2. Way P O Box 9106 Norwood MA 02062 9106 U S A Tel 781 329 4700 www analog com Fax 781 326 8703 2004 Analog Devices Inc All rights reserved htt p www BDN C conh AD GENERAL DESCRIPTION The 3B39 is a single channel signal conditioning current output module that interfaces isolates and filters a 0 to 10V or 10V to 10V input signal and provides an isolated process current output across loads of 0 to 850 The output current appears at the 3B Series backplane current output screw terminal block It is intended for high accuracy process control and monitoring applications requiring complete galvanic isolation and protection against damage from transients and faults between systems or separated system elements Either of the two input voltage ranges can be converted to either of the two output current ranges via programming jumpers provided on the bottom of the module Model 3B39 features a nonlinearity of 0 01 and an accuracy of 0 1 Providing 1500V peak of galvanic transformer based isolation output to input and power the 3B39 offers a common mode rejection CMR of 90 dB 50 60 Hz to preserve the integrity of low level signals in noisy environments The 3B39 is mix and match and hot swappable with other 3B Series modules so it can be inserted or removed from any socket in the same backplane without disturbing system power Signal isolation by transformer coupling uses a proprietary modulation technique for linear st
3. ANALOG DEVICES FEATURES Interfaces isolates amp filters a 0 to 10V or 10V to 10V input signal and provides an isolated process current output across loads of 0 to 8500 Intended for high accuracy process control and monitoring applications requiring total galvanic isolation Module circuitry can withstand 220v rms at the output screw terminals All 3B39 series modules are mix and match and Hot Swappable APPLICATIONS Industrial signal conditioning Industrial signal isolation Industrial signal filtering PRODUCT OVERVIEW The 3B Series of Signal Conditioning I o Subsystems provide a low cost versatile method of transferring analog transducer signals to a data acquisition monitoring or control system without the inherent noise non linearity drift and extraneous voltages The modules are designed to directly accept analog signals from Thermocouples RTD s AC and DC Strain Gages Torque Transducers Frequency Transducers LVDTs millivolt or process current signals The modules amplify isolate linearize and convert the transducer output signals to standardized analog inputs for high level analog I O subsystems The 3B Series Subsystem consists of a 10 relay rack with universal mounting backplane and a family of plug in up to 16 per rack input and output signal conditioning modules Eight and four channel backplanes are also available Each backplane incorporates screw terminals for sensor inputs and current
4. UPUT POWER PINS OUT ee E OR 2 IRETURN 2 e j1 1OUT 4 CURRENT OUTPUT e KEY 4 3 KEY CONFIGURATION 2 j i LOOPPWRCOM 6 e j5 24V wsen ror di edi i RESERVED 8 e 7 RESERVED i aciano oe RESERVED 10 9 15V H RANGING CARD P F VOUT12 e 11 POWER COM gt ee n tvouTi4 e 134 15V 7 ee a a RETURN Sraa ee a INPUT PINS escout2fe o i ron 5 3B BACKPLANE cuccom s e ejam CURRENT OUTPUT TERMINALS N Exc ejo o 5 exc Figure 3 3B39 Input Field Connections Figure 4 Model 3B Series Module with pin out assignments Table 1 Pin Function Descriptions 1 3 Pin No Description 1 OUT 2 RETURN 3 4 ESD CAUTION ESD electrostatic discharge sensitive device Electrostatic charges as high as 4000 V readily accumulate on the human WARNING body and test equipment and can discharge without detection Although this product features proprietary ESD C 5 protection circuitry permanent damage may occur on devices subjected to high energy electrostatic discharges SAT AA Therefore proper ESD precautions are recommended to avoid performance degradation or loss of functionality ESD SENSITIVE DEVICE Rev 0 Page 5 of 8 htt p www BDI C conh AD NOTES 2004 Analog Devices Inc All rights reserved Trademarks and ANALOG registered trademarks are the property of their respective companies www analo g com sam Lal DEVICES Rev 0 Pag
5. able and reliable performance A demodulator on the output side of the signal transformer recovers the original signal which is then filtered and converted to an accurate current output by a current V to I converter output stage Output protection enables the 3B39 to withstand accidental connection to 220V rms power lines without damage isolating computer side circuitry The 3B39 provides total ground isolation and transient protection when interfacing DACs to standard 4 20 mA current loops common requirement in microcomputer based control system Rev 0 Page 2 of 8 htt p www BDI C conh AD 3B39 Specifications typical 25 C and 15 V dc and 24 V dc Power Description Model 3B39 Input Voltage Standard Ranges Input Without Damage Input Resistance Standard Ranges R 0 to 8509 Custom Ranges Initial 25 C Nonlinearity Current Output Zero Span Zero and Span Adjustment Range Input 0 1 Hz to 10 Hz Bandwidth Output 100 kHz Bandwidth Bandwidth 3 dB Output Rise Time 10 to 90 Span Input to Output Continuous Transient 1 KQ Source Imbalance 50 60 Hz Continuous Normal Mode Transient 15 V dc Supplies Rated Operation Current Sensitivity 24 V dc Loop Supply Rated Operation Current 0 V to 10 V or 10 V to 10 V 20 V to 20 V maximum 10 kQ Output Ranges 4 mA to 20 mA or 0 mA to 20 mA Not Available Accuracy 0 1 Span CJC Sensor Error 0 01 Span
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7. o easily handle signal conditioning problems in measurement and control applications Some typical uses are in microcomputer based data acquisition systems programmable controllers analog recorders dedicated control systems and any other applications where monitoring of temperature pressure flow and analog signals are required Since each input module features two simultaneous outputs the voltage output can be used to provide an input to a microprocessor based data acquisition or control system while the current output can be used for analog transmission operator interface or an analog backup system Each input module is a single channel signal conditioner which plugs into a socket on the backplane and accepts its signal from the input screw terminals All input modules provide input protection amplification and filtering of the input signal accuracy of 0 1 low drift of 1 uV C low level input modules and feature two high level analog outputs that are compatible with most process instrumentation The isolated input modules also provide 1500 V peak isolation The choice of a specific 3B module depends upon the type of input signal Input modules are available to accept millivolt volt process current thermocouple RTD AC and DC strain gage frequency and LVDT inputs The voltage output of each module is available from the sysem I O connector while the current output is available on the output screw terminals One Technology
8. outputs and a 26 pin connector for high level single ended voltage outputs to the user s equipment The input modules feature complete signal conditioning circuitry optimized for specific sensors or analog signals and provide two simultaneous high level analog outputs 0 to 10V or 10V and 4 20 mA or 0 20 mA Rev 0 Information furnished by Analog Devices is believed to be accurate and reliable However no responsibility is assumed by Analog Devices for its use nor for any infringements of patents or other rights of third parties that may result from its use Specifications subject to change without notice No license is granted by implication or otherwise under any patent or patent rights of Analog Devices Trademarks and registered trademarks are the property of their respective companies Isolated Process Current Output FUNCTIONAL BLOCK DIAGRAM LOOP SUPPLY LOOP 24V COMMON 15VDC 15V0C O O O Oh am CONNECTOR 0 20 mA bur OUTPUT Pt maa o L etes ofeh SYSTEM l ATION CONNECTOR P 1 7 ay vd Oj P2 RETURN P2 Figure 1 3B39 Functional Block Diagram Output modules accept 0 to 10V or 10V single ended signals and provide an isolated 4 20 mA or 0 20 mA process signal All modules feature a universal pin out and may be readily hot swapped under full power and interchanged without disrupting field wiring The Analog Devices 3B Series Signal Conditioning Subsystem is designed t
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ANALOG DEVICES 3B39 handbook