Input Modules - MV-Sirius Hochshule Offenburg
Contents
1. REV A The input modules are available in several factory calibrated input ranges Each input module includes separate screwdriver adjustable zero and span potentiometers for both the voltage output and the current output which can be used for fine cali bration within the chosen range The voltage and current ad justments are independent and noninteractive allowing for precise calibration of both outputs The current output of each input module has two user program mable jumper options One option allows the user to program the current output to be proportional to either a 0 V to 10 V output or a 10 V to 10 V output The second option allows the user to set the current output span to 4 20 mA or 0 20 mA All modules are shipped from the factory configured so that the current output is proportional to the 0 V to 10 V output and all current outputs are 4 20 mA WIDE ZERO SUPPRESSION CAPABILITY A wide zero suppression capability and easy custom ranging are available with a unique plug on ranging card AC1310 If a special input range is desired it can be provided by ordering the externally programmable version of the desired module i e 3B32 00 and the plug on ranging card AC1310 This card houses user supplied resistors that determine the zero and span of the desired range RTD modules accept an additional resistor to establish linearization of the input signal while the 3B37 thermocouple module uses an additional resistor to2. Table II Power Requirements 15 V dce 15 Vdc 24 V dc Model Current Current Current 3B10 10 mA 10 mA 27 mA 3B11 10 mA 10 mA 27 mA 3B12 10 mA 10 mA 27 mA 3B13 12 mA 12 mA 27 mA 3B14 20 mA 20 mA 27 mA 3B15 20 mA 20 mA 27 mA 3B16 45 mA 10 mA 27 mA 3B17 65 mA 65 mA 27 mA 3B18 50 mA 15 mA 27 mA 3B19 4 mA 4 mA 27 mA 3B20 65 mA 65 mA 27 mA 3B30 10 mA 10 mA 27 mA 3B31 10 mA 10 mA 27 mA 3B32 10 mA 10 mA 27 mA 3B34 10 mA 10 mA 27 mA 3B37 12 mA 12 mA 27mA 3B39 5 mA 5 mA 35 mA 3B40 10 mA 10 mA 27mA 3B41 10 mA 10 mA 27mA 3B42 10 mA 10 mA 27mA 3B43 10 mA 10 mA 27mA 3B44 10 mA 10 mA 27mA 3B45 16 mA 16 mA 27mA 3B46 19 mA 19 mA 27mA 3B47 16 mA 14 mA N A Typical number is 40 mA per module plus 5 mA for LVDT drive Current Supply current requirements for LVDT current is 75 of the LVDT rms current Module currents for rated supply inputs full scale outputs and no load on voltage outputs AC POWER SUPPLY AC POWER SUPPLY EXTERNAL DC POWER CONNECTIONS CONNECTIONS DC POWER SUPPLY CONNECTIONS CONNECTIONS Figure 5 Power POWER SUPPLY SPECIFICATIONS Supply Connections Model AC1300 AC1301 AC1302 AC1307 Input Voltage 105 V 125 V ac 50 Hz to 400 Hz 105 V 125 V ac 50 Hz to 400 Hz 22 3 V 26 4 V 105 V 25 V ac 50 Hz to 400 Hz 205 V 240 V ac 50 Hz to 400 Hz AC1300E 205 V 240 V ac 50 Hz to 400 Hz AC1301E 205 V 240 V ac 50 Hz to 400 Hz AC1307E 90 V 110 V ac 50 Hz to 400 Hz AC1300F 90 V 110
3. C for G gt 100 RTI Span 0 0025 Reading C Current Output w r t Voltage Output Zero 0 0025 Span C ba Span 0 0025 Reading C i Common Mode Voltage Input to Output 1500 V pk max 6 5 V Common Mode Rejection 50 Hz or 60 Hz 1 kM Source Unbalance 160 dB 90 dB Normal Mode Rejection 50 Hz or 60 Hz 60 dB 60 dB Differential Input Protection Voltage Output Protection Current Output Protection Zero and Span Adjustment Range Input Transient Protection Input Resistance Bandwidth 220 V rms Cont Continuous Short to Ground 130 V rms Cont 5 of Span Meets ANSI IEEE C37 90 1 1989 15 MQ 3 Hz 3 dB or 10 kHz 3 dB 130 V rms Cont x N A 100 MQ 3 Hz 3 dB or 20 kHz 3 dB Power Supply Size Environmental Temperature Range Rated Performance Storage Temperature Range Relative Humidity Conforms to MIL Spec 202 RFI Susceptibility 15 V de 24 V de 3 150 X 0 775 X 3 395 25 C to 85 C 55 C to 85 C 0 to 95 60 C Noncondensing 0 5 Span Error 5W 400 MHz 3 ft NOTES Voltage output range is determined by the module input range while the current output range is user selectable Model 3B47 does not have a current output For a 0 20 mA range a typical minimum output current is 10 pA Accuracy spec includes the combined effects of repeatability hysteresis and linearity Does not include sensor or single source error 3B42 3B43 and 3B44
4. have a 5 accuracy 3B17 has 0 1 accuracy when calibrated RTD Models 3B14 3B15 3B34 LVDT Model 3B17 have a linearization conformity error of 0 05 5Models 3B13 3B14 3B15 3B16 and 3B17 each have common mode voltage determined by the internal excitation circuitry Applies only to units with 3 Hz bandwidth Models 3B18 3B40 3B41 have a CMR 100 dB 7Applies only to units with 3 Hz bandwidth Includes excitation circuitry for models 3B13 3B14 3B15 3B16 3B17 3B18 and 3B34 A wide range of zero suppression and custom calibration may be accomplished with a custom ranging card AC1310 Model 3B17 has a gain adjustment range of 256 1 and an output referred zero suppression range of 5 V Model 3B18 has a 20 kHz bandwidth Models 3B40 and 3B41 have a 10 kHz bandwidth Model 3B17 has a 100 Hz bandwidth 11424 V de power is only needed for driving the current output at up to 850 Q If only voltage output is used or a current output load of 400 Q or less is desired 15 V is all that is required Specifications same as isolated modules Specifications subject to change without notice Table I Input Modules Selection Voltage Current Nonisolated Isolated Input Type Span Output Output Modules Modules DC 10 mV 50 mV 100 mV 10 V 4 20 mA 0 20 mA 3B10 3B30 3B40 DC 1V 5V 10 V 4 20 mA 0 20 mA 3B10 3B31 3B41 DC 10 V 10 V 4 20 mA 0 20 mA 3B11 3B31 3B41 DC 4 20 mA 0 20 mA 0 V 10 V 4 20
5. high level voltage output of the input module is compatible with any high level multiplexer or analog to digital converter which converts the data to the digital form the microprocessor re quires The digital output of the microprocessor is connected to a digital to analog converter that provides a high level output voltage The output module converts this high level voltage to a process current which can be used to drive an actuator or any other control element 8 REV A C748g 1 5 97 PRINTED IN U S A
6. mA 0 20 mA 3B12 3B32 Thermocouple Types J K T E R S B 0 V 10 V 4 20 mA 0 20 mA 3B37 Thermocouple Types J K T E R S B Linearized 0 V 10 V 3B47 100 Q Platinum RTD 2 3 4 Wire a 0 00385 Linearized 0 V 10 V 4 20 mA 0 20 mA 3B14 3B34 100 Q Platinum RTD Kelvin 4 Wire a 0 00385 Linearized 0 V 10 V 4 20 mA 0 20 mA 3B15 10 Q Copper RTD 2 3 Wire 0 V 10 V 4 20 mA 0 20 mA 3B34 120 Q Nickel RTD 2 3 Wire 0 V 10 V 4 20 mA 0 20 mA 3B34 Strain Gage 30 mV 100 mV 10V 4 20 mA 0 20 mA 3B16 3B18 LVDT 4 5 6 Wire 10V 4 20 mA 0 20 mA 3B17 AD590 AC2626 Solid State Temperature Transducer 0 V 10 V 4 20 mA 0 20 mA 3B13 AC 0 mV 50 mV rms 0 mV 100 mV rms 0 V 10 V 4 20 mA 0 20 mA 3B42 AC 0 V 10 V rms 0 V 10 V 4 20 mA 0 20 mA 3B43 AC 0 V 50 V rms 0 V 250 V rms 0 V 10 V 4 20 mA 0 20 mA 3B44 Frequency 0 Hz 25 Hz 0 Hz 300 Hz 0 V 10 V 4 20 mA 0 20 mA 3B45 Frequency 0 Hz 1500 Hz 0 Hz 3000 Hz 0 kHz 25 kHz 0 V 10 V 4 20 mA 0 20 mA 3B46 THERMOCOUPLE INPUT MODELS 3B37 3B47 The isolated thermocouple models incorporate cold junction compensation circuitry which provides an accuracy of 0 5 C over the 5 C to 45 C ambient temperature range Open thermocouple detection upscale is also provided Standard models are available with factory calibration for thermocouple types J K T E R S and B Model 3B47 provides a linearized 0 V to 10 V output but has no current output RTD INPUT MOD
7. or a 10 V to 10 V input The second option allows the user to set the cur rent output span to 4 20 mA or 0 20 mA All output modules are shipped from the factory so that the current output is pro portional to the 0 V to 10 V input and all current outputs are 4 20 mA INPUT AND OUTPUT MODULE DIMENSIONS MODULE CONNECTORS PIN DESIGNATIONS OPTIONAL RANGING CARD TOP VIEW OUTPUT POWER CURRENT OUTPUT PROGRAMMING OPTIGNAL RANGING CARD R1 R4 ARE USER SUPPLIED RESISTORS BOTTOM VIEW REV A Input Modules e wer GENERAL OUTPUT MODULE SPECIFICATIONS typical 25 C and 15 V 24 V dc power Model 3B39 Isolated 3B19 Nonisolated Inputs 0 Vto 10 V 10V s Outputs 4 20 mA or 0 20 mA RL 0 Q to 850 Q Accuracy 0 1 Span Nonlinearity 0 01 Stability vs Ambient Temperature Zero 0 0025 Span C z Span 0 002 Reading C Common Mode Voltage Output to Input and Power Supply 1500 V pk max N A Common Mode Rejection 90 dB N A Normal Mode Output Protection 220 V rms Continuous Zero and Span Adjustment Range 5 of Span Output Transient Protection Meets ANSI IEEE C37 90 1 1989 N A Input Resistance 10 kQ 130 V rms Continuous Power Supply 15 V dc 24 V dc Maximum Input Voltage Without Damage 20 V Size 3 150 X 0 775 X 3 395 Environmental Temperature Range Rated Performance 25 C to 85 C 3 Storage Temperature Range 55 C to 85 C Rela
8. set the cold junction compensation level This ranging capability allows the user to provide zero suppres sion of up to and beyond 100 of the input range and provide a very wide range of span modification It also allows the user to map any portion of the input signal to the full output span For example a user who wants to measure temperature with a ther mocouple in the range of 800 C to 900 C can use this ranging card for greater system resolution within that 100 C temperature span This tremendous flexibility should satisfy virtually any requirement The resistor values are determined by equations defined for each module See the appropriate data sheet within the User s Manual for further details Special ranges can also be factory configured Analog Devices will provide the function when a model 3B _ CUSTOM is ordered with the desired range The 3B47 linearized thermocouple input module cannot be ranged with an AC1310 since approximately 15 components are required for linearization A factory config ured 3B47 CUSTOM can provide the desired input range 3 3B Series GENERAL INPUT MODULE SPECIFICATIONS typical 25 C and 15 V 24 dc power Isolated Nonisolated Modules Modules Inputs Per Selection Table Fe Outputs 0 V to 10 V 5 mA or z 10 V 5 mA 4 20 mA or 0 20 mA Ri 0 Q to 850 Q Accuracy 0 1 Span 7 Nonlinearity 0 01 Span Stability vs Ambient Temperature Voltage Output Zero 1 uV
9. 0 3B41 Models 3B10 and 3B11 are nonisolated modules that accept millivolt and voltage signals respectively Models 3B30 and 3B31 are isolated modules that accept millivolt and voltage signals respectively Models 3B40 and 3B41 each have a 10 kHz bandwidth to interface to dynamic signals and are isolated mod ules that accept millivolt and voltage signals respectively CURRENT INPUT MODELS 3B12 3B32 Models 3B12 and 3B32 are respectively nonisolated and iso lated modules that accept process current signals ADS590 AC2626 INPUT MODEL 3B13 Model 3B13 accepts an AD590 as its input signal AC INPUT MODELS 3B42 3B43 AND 3B44 Models 3B42 3B43 and 3B44 are isolated modules that accept ac sine wave input signals Model 3B42 accepts signals ranging from 20 mV to 1 V rms model 3B43 accepts signals ranging from 1 V to 50 V rms and model 3B44 accepts inputs ranging from 50 V to 550 V rms When used with external shunts each unit can readily interface to ac currents FREQUENCY INPUT MODELS 3B45 3B46 Models 3B45 and 3B46 are isolated modules that accept frequency inputs Model 3B45 accepts full scale frequencies from 25 Hz to 1100 Hz while model 3B46 accepts inputs from 520 Hz to 25 kHz Model 3B45 has a 15 ms debounce option Both operate with either a 0 V or 1 6 V threshold and have adjustable hysteresis REV A FEATURES High Level Voltage Input 0 V to 10 V 10 V Process Current Output 4 20 mA 0 20 mA High Accuracy 0 1 Relia
10. ANALOG DEVICES The Complete Signal Conditioning 1 0 Subsystem PUT ano TPUT FEATURES BENEFITS Low Cost Completely Integrated 16 Channel Modular Signal Conditioning Subsystem Wide Selection of Functionally Complete Input and Output Plug In Modules Rugged Industrial Chassis Rack or Surface Mounted Onboard Power Supplies Available Analog Input Modules Available for Direct Interface to a Wide Variety of Signal Sources Sensors Thermocouples RTDs AC and DC Strain Gages Torque Transducers Load Cells Frequency LVDT AD590 AC2626 Millivolt and Voltage Sources 4 20 mA 0 20 mA Process Current Inputs Current Output Modules 4 20 mA 0 20 mA Outputs Complete Signal Conditioning Function Input Protection Low Pass Filtering Amplification Galvanic Isolation to 1500 V Wide Range Zero Suppression High Noise Rejection and RFI EMI Immunity Sensor Excitation When Required Simultaneous Voltage and Current Outputs Mix and Match Input Capability and Dual High Level Outputs Provide Excellent System Flexibility Interfaces Directly to Types J K T E R S and B Thermocouples Cold Junction Compensation on Each Channel Open Input Detection Specifications Valid Over the 25 C to 85 C Temperature Range REV A 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 which may r
11. Channel Power Indicator LEDs Indicate 15 V and 24 V Power Applied Physical Size with Modules 17 400 X 5 200 X 4 373 11 00 X 5 200 X 4 373 7 800 X 5 200 X 4 373 Fuse 220 V Fuse at 500 mA 5 mm x 20 mm NOTES Actual Power Supply requirements are a function of the quantity and types of module used see Table II 2AC Power Supplies include AC1300 and AC1301 Each is offered in one domestic and three foreign versions Refer to Power Supply Specifications 3AC1302 is an optional de Power Supply Specifications same as 3B01 Specifications subject to change without notice pa 7 800 198 12 __________ a o 250 6 35 TY i E DLT 7 0 250 16 35 TYP 5 200 132 08 THRU STANDOFF ACCEPTS 6 32 BG 4PLACES 3B03 4 Channel Backplane PIN DESIGNATIONS BACKPLANE 3B01 3B02 3B03 Power Connector System Connector DC Power High Level Analog I O 1 LOOPV o o 2f LOOPCOM o 3 gt FNC o e 4j 0 15V o 2 5 o 15VCOM bd o 6f o 15V e BOTTOM VIEW o o MATING CONNECTOR ne AMP PIN 202237 1 6 pcs SS and ans AMP PIN 207377 1 OR EQUIVALENT MATING ae CONNECTOR AMP PIN 499958 6 BOTTOM VIEW GROUND OR EQUIVALENT REV A POWER SUPPLY The 3B Series Subsystem can operate from a common ac power supply or dc dc 24 V input power supply mounted on the backplane or ex
12. Class I Division 2 Groups A B C and D Locations CE Approval All 3B Modules and Backplanes Meet the European EMC Directive One Technology Way P O Box 9106 Norwood MA 02062 9106 U S A Tel 617 329 4700 World Wide Web Site http www analog com Fax 617 326 8703 Analog Devices Inc 1997 3B Series GENERAL DESCRIPTION The 3B Series Signal Conditioning I O Subsystem provides a low cost versatile method of interconnecting real world analog signals to a data acquisition monitoring or control system It is designed to interface directly to analog signals such as thermo couple RTD ac and dc Strain Gage Torque Transducer Frequency LVDT AD590 AC2626 solid state temperature sensor outputs and millivolt or process current signals and convert the inputs to standardized analog outputs compatible with high level analog I O subsystems The 3B Series Subsystem consists of a 19 relay rack compat ible universal mounting backplane and a family of plug in input and output signal conditioning modules up to 16 per rack 8 and 4 channel backplanes are also available Each backplane incorporates screw terminals for sensor inputs and current out puts and a connector for high level single ended outputs to the user s equipment Input and output modules are offered in both isolated 41500 V peak and nonisolated versions The input modules feature complete signal conditioning circuitry optimized for specific sensors or analog sig
13. D models and the 3B47 thermo couple model linearize the input signal to provide an output that is linear with temperature High Noise Rejection The 3B Series Subsystem was designed to accurately process low level signals in electrically noisy envi ronments by providing excellent common mode and normal mode noise rejection and RFI EMI immunity CURRENT OUTPUTS EXTERNAL DC POWER CONNECTOR SUPPLY CHANNEL 0 NUMBER HI LO AC LINE Figure 1 3B Series System Functional Block Diagram REV A Input Modules FEATURES Wide Variety of Sensor Inputs Thermocouples RTDs AC and DC Strain Gages Torque Transducers Frequency LVDT AD590 AC2626 Dual High Level Outputs Voltage 0 V to 10 V or 10 V Current 4 20 mA 0 20 mA Mix and Match Input Capability Sensor Signals mV V 4 20 mA 0 20 mA High Accuracy 0 1 Low Drift 1 pV C Reliable Transformer Isolation 1500 V CMV CMR 160 dB Meets ANSI IEEE C37 90 1 1989 Transient Protection Input Protection 130 V or 220 V rms Continuous Low Cost Per Channel GENERAL DESCRIPTION Each input module is a single channel signal conditioner that plugs into sockets 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 accu racy 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 in
14. ELS 3B14 3B15 3B34 Each RTD model provides a sensor excitation current of 0 25 mA 1 0 mA for Cu RTDs and produces an output signal that is linear with temperature with a conformity error of 0 05 of span and accuracy of 0 1 span The lead resistance effect for the three models is 0 02 C Q for the 3B14 and the 3B34 and 00001 C Q for the 3B15 Model 3B34 is available for 100 Q Pt 10 Q Cu and 120 Q Ni RTD inputs STRAIN GAGE INPUT MODELS 3B16 3B18 Models 3B16 and 3B18 are designed to accept inputs from full four arm bridge strain gage type transducers The 3B16 has a 3 Hz bandwidth provides a constant 10 V bridge excitation and can be used with a bridge resistance of 300 Q or greater Model 3B18 has a 20 kHz bandwidth to interface to dynamic signals provides a switch selectable excitation of 10 V or 3 3 V and can be used with a bridge resistance of 100 Q or greater LVDT INPUT MODEL 3B17 Model 3B17 is a nonisolated wideband input module that ac cepts signals from 4 5 or 6 wire LVDT or RVDT transducers Unlike other 3B modules all zero and span calibration is ac complished by screwdriver adjustments Gain can be adjusted on a 256 1 range with a combination of a rotary switch and potentiometer Zero suppression is output referred and can provide a 5 V adjustment The 3B17 provides an ac excitation of 1 V to 5 Vrms at frequencies ranging from 1 kHz to 10 kHz MILLIVOLT AND VOLTAGE INPUT MODELS 3B10 3B11 3B30 3B31 3B4
15. UT INPUT MODULES ACCEPT REAL WORLD ANALOG INPUTS AND PROVIDE TWO HIGH LEVEL ANALOG OUTPUTS MODULE QUTPUT OUTPUT MODULES ACCEPT HIGH LEVEL VOLTAGE INPUTS AND PROVIDE PROCESS CURRENT OUTPUTS MODULE 3B Series Ordering Guide for additional information on acces sories and spare parts MODULE CONFIGURATION Each module is available in the standard ranges defined in the Ordering Guide If a special range is needed it can be provided with the externally programmable version of the desired module the plug on ranging card AC1310 and user supplied resistors that determine the zero and span of the range The resistor values vary from module to module Detailed information on the required resistor values is provided on the appropriate data sheet within the User s Manual If desired special ranges can be factory configured Consult the factory for further information 0 10V OR 10V AND 4 20mA ANALOG VO SUBSYSTEM i e RTI MICRO COMPUTER 0 10V OR 10V Figure 6 Functional Block Diagram of a Typical Measurement and Control Application Using the 3B Series Subsystem Which Is Shown Below with an Analog Devices RTI 711 APPLICATION EXAMPLE An example of how the 3B Series Subsystem might be used with an analog I O subsystem in a measurement and control applica tion is shown in Figure 6 The sensor which could be a thermo couple is directly connected to the input module The
16. V ac 50 Hz to 400 Hz AC1301F 220 V 260 V ac 50 Hz to 400 Hz AC1300H 220 V 260 V ac 50 Hz to 400 Hz AC1301H Output Voltage 15V 15V 15V 15 V 15 V 24 V Output Current 200 mA 350 mA 190 mA 800 mA 225 mA 350 mA Operating Temperature 25 C to 71 C 25 C to 71 C 25 C to 71 C 25 C to 71 C Storage Temperature 25 C to 85 C 25 C to 85 C 40 C to 100 C 25 C to 85 C Dimensions Inches 3 5 X 2 5 X 1 25 3 5 X 2 5 X 1 62 2 0 X 2 0 X 0 38 4 0 X 2 8 X 3 4 The 24 V output is unregulated REV A 3B Series SELECTION GUIDELINES When ordering 3B Series products the total system configura tion must be considered The following information is intended to serve as a guideline The 3B Series Ordering Guide provides a more complete description of all the elements Should you have additional questions contact our sales office in your area A typical 3B Series system configuration might consist of a 3B01 backplane sixteen 3B series modules a power supply AC1301 a power cord AC1340 D an interface cable AC1315 and a rack mount chassis AC1330 A universal interconnection board may be used to connect the high level voltage outputs to any analog I O subsystem If panel or NEMA mounting is desired the AC1331 might be used Refer to the SENSOR OR TRANSMITTER mV V THERMOQCOUPLE STRAIN GAGE RTD FREQUENCY LVDT 4 20mA AD590 ACTUATOR VALVE INP
17. and provide transducer excitation when necessary A cold junction sensor is supplied on each channel to accommodate thermocouple modules Each channel has two screw terminals for the output connections for the 4 20 mA output Two 26 pin sys tem connectors provide high level voltage I O for all channels The 3B Series Subsystem offers high density packaging to con serve mounting space and can be easily tailored to fit the user s needs All modules feature a universal pinout which assures interchangeability The plug in design allows easy reconfiguration OUTLINE DIMENSIONS Dimensions shown in inches and mm 5 200 132 08 0 250 6 35 TYP THRU STANDOFF ACCEPTS 6 32 SCREW 4PLACES 18 91 480 31 MAX bs ai 5 125 130 18 3 53 89 66 0 093 MAX 2 36 LA O hn t 0 812 20 62 3B01 16 Channel Backplane 11 000 279 4 Paed Mp 0 250 6 35 TYP 4 E m A T Wee ae ae T e 0 250 6 35 TYP 5 200 132 08 THRU STANDOFF ii ae Bao ACCEPTS 6 32 LL o pras aaa T ERA 3B02 8 Channel Backplane BACKPLANE SPECIFICATIONS Model 3B01 3B02 3B03 Channels 16 8 4 Power Supply Options External Power 15V Requirements 24V AC Power Supply 100 115 220 240 V ac DC Power Supply 24 V s Cold Junction Sensor Provided on Each
18. ble Transformer Isolation 1500 V CMV CMR 90 dB Meets ANSI IEEE C37 90 1 1989 Transient Protection Output Protection 130 V or 220 V rms Continuous Reliable Pin and Socket Connections Low Cost Per Channel GENERAL DESCRIPTION Each output module accepts a high level analog signal from the system connector and provides a current output on the output screw terminals When a 24 V loop supply is used loads up to 850 Q can be driven If desired 15 V can be used to power the output modules with a smaller load up to 400 Q Each output module features high accuracy of 0 1 If isolation is required the 3B39 provides 1500 V peak common mode voltage isola tion protection The transfer function provided by each output module is Input 0 V to 10 V or t10 V Output 4 20 mA or 0 20 mA Figure 3 shows a functional diagram for the model 3B39 iso lated voltage to current converter The input signal drives a voltage to current converter through the isolation barrier Each output module has zero and span potentiometers for fine cali bration of the current output LOOP 42v COMMON 4 20mA OR 0 20mA OUTPUT OTO 10V 10V INPUT FROM SYSTEM CONNECTOR MAGNETIG ISOLATION Figure 3 Model 3B39 Isolated Voltage to Current Converter Functional Block Diagram Each output module has two user programmable jumper op tions One option allows the user to program the current output to be proportional to either a 0 V to 10 V input
19. esult from its use No license is granted by implication or otherwise under any patent or patent rights of Analog Devices WIDE WAFIETY OF SENSOR Ano ARALOG SIG ALL MPLS THERMOCOUPLE COLD MURETHIN COMPCRATION PRIVID Om EECH CHL Rae NDUSTRUAL SDA TRAMAALS PORA ANECT SERA MIAP High CMV Isolation High Accuracy and Low Drift Provide a High Performance Data Acquisition Solution Channel to Channel and Input to Output Isolation of 1500 V is Provided by the Isolated Modules Accuracy for All Module Types is 0 1 Chopper Stabilized Amplification Assures Low Drift 1 pV C and Excellent Long Term Stability Isolated Modules Designed to Meet IEEE Standard for Transient Voltage Protection ANSI IEEE C37 90 1 1989 Wide Range Zero Suppression Any Portion of the Input Span Can be Mapped Into the Full Output Span User Configurability Unique Plug On Component Carrier Allows Users to Easily Create Customized Ranges With Complete Control Over Zero Suppression and Span Without Opening the Module Easy to Install Calibrate and Service Direct Connections to Industrial Screw Terminals Modules Removable Without Disturbing Field Wiring or Power Front Panel Zero and Span Adjustments for Both Voltage and Current Outputs Convenient Connection to User s Equipment Interfaces Directly to Analog I O Subsystems Used for for Single Board Computer Interfaces Universal Adapter Board Allows Easy Interface to Any Equipment FM Approved Approved for Use in
20. nals and provide high level analog outputs Each input module provides two simultaneous outputs 0 V to 10 V or 10 V and 4 20 mA or 0 20 mA Output modules accept 0 V to 10 V or 10 V single ended signals and pro vide an isolated or nonisolated 4 20 mA or 0 20 mA process signal All modules feature a universal pinout and may be readily mixed and matched and interchanged without disrupt ing field wiring Each backplane contains the provision for a subsystem power supply The 3B Series Subsystem can operate either from a common dc dc or ac power supply mounted on each backplane or from externally provided dc power Two LEDs are used to indicate that power is being applied APPLICATIONS The Analog Devices 3B Series Signal Conditioning Subsystem is designed to provide an easy and convenient solution to signal conditioning problems in measurement and control applica tions Some typical uses are in mini and microcomputer based systems standard data acquisition systems programmable controllers analog recorders dedicated control systems and any other applications where monitoring and control 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 back
21. strumentation The isolated input modules also provide 1500 V isolation The choice of a specific 3B module depends on the type of input signal and also whether an isolated or nonisolated interface is required Input modules are available to accept millivolt volt process current thermocouple RTD ac and dc strain gage torque transducer frequency LVDT and AD590 inputs The voltage output of each module is available from the voltage I O connector while the current output is available on the output screw terminals Figure 3 defines all analog input connections The transfer function provided by each input module is Input specified sensor measurement range Outputs 0 V to 10 V dc or 10 V 4 20 mA nonisolated 0 20 mA output programmed by a jumper option on the module Note The 3B47 linearized thermocouple input module has only a 0 V to 10 V output it does not have a 4 20 mA output Figure 2 Model 3B37 Functional Block Diagram For example Figure 2 shows a functional diagram for the model 3B37 isolated thermocouple signal conditioner The input signal is filtered amplified and has cold junction compensation ap plied before the isolation barrier Reliable magnetic isolation is used to provide isolation protection The outputs of the module are isolated from the input up to 1500 V peak and calibrated for 0 V to 10 V voltage output and 4 20 mA current out put which correspond to the specified input span
22. ternal 15 V and 24 V supplies can be used The power supply is bused to all signal conditioners on the backplane Supply current is a function of the modules that are actually used see Table II The power supply outputs listed in the Specifications cover most cases Each power supply operates over a 25 C to 71 C temperature range If the user wishes to use a 15 V supply for current output the 15 V output of the AC1300 or AC1301 can be strapped to the loop power on connector P3 With this arrangement the load resistance on current outputs is limited to 400 Q max The AC1307 is an open frame triple output power supply that was designed to address the power requirements of the majority of 3B applications When the 15 V supplies of the AC1307 are fully loaded the 24 V output of 350 mA will drive only thir teen 4 20 mA current loop outputs When the 15 V supplies are loaded at 80 or less the 24 V may be used to power a full rack of sixteen 4 20 mA outputs If 24 V is supplied from an external source a dc dc converter ADI model AC1302 can be used to supply 15 V to the back plane The current loop power is provided from the 24 V source which must be capable of handling the desired number of current loop outputs If both 24 V and 15 V are supplied from an external source the power supply requirements must be satisfied for the desired number of modules AC1300 AC1301 AC1307 HI LO GND TB33 Input Modules
23. tive Humidity Conforms to MIL Spec 202 RFI Susceptibility 0 to 95 60 C Noncondensing 0 5 Span Error 5 W 400 MHz 3 ft NOTES Accuracy spec includes combined effects of repeatability and linearity 2424 V de supply is only needed for driving loads of up to 850 Q 15 V dc can be used for driving a 400 Q maximum load Specifications same as 3B39 Specifications subject to change without notice V wan DC STRAIN GAGE FREQU INPUT CONNECTIONS ALL INPUT CONNECTIONS USE 6 32 SCREW TERMINALS COMPATIBLE WITH 14 AWG WIRE Figure 4 3B Series Subsystem Input Connections 5 3B Series BACKPLANE FUNCTIONAL DESCRIPTION The 3B Series Signal Conditioning Subsystem consists of a family of backplanes input modules output modules and power supplies The three backplane models 3B01 3B02 and 3B03 are designed for 16 8 and 4 channels respectively to offer users the flexibility to match the size of a system to specific applications The 16 channel backplane can be mounted in a 19 X 5 25 panel space Several mounting options are offered including rack surface and NEMA enclosure mounting The 3B01 backplane can accommodate up to 16 signal condi tioning modules These modules can be fixed and matched in the backplane to provide the desired number of channels for a specific function Each channel has four screw terminals for input connections These connections satisfy all transducer inputs
24. up system The 4B Series Alarm Trip Subsystem is available as a compan ion product to address alarm or ON OFF control needs It can also be used to provide alarm indication for transmitters or other high level inputs It is particularly useful in computer based applications where redundant alarming is required DESIGN FEATURES AND USER BENEFITS Ease of Use Direct sensor interface via screw terminals stan dardized high level outputs factory precalibration of each unit and the modular design make the 3B Series Subsystem ex tremely easy to use The subsystem features rugged packaging for the industrial environment and can be easily installed and maintained High Reliability To assure high reliability all field wired terminations offer 130 V or 220 V rms normal mode protection Gold plated pin and socket connectors are used throughout the system to assure connection reliability The isolated modules offer protection against high common mode voltages and are designed to meet the ANSI IEEE Standard for Transient Voltage Protection C37 90 1 1989 High Performance The high quality signal conditioning fea tures 0 1 calibration accuracy and chopper based amplifica tion which assures low drift 1 uV C and excellent long term stability For thermocouple applications high accuracy cold junction sensing is provided in the backplane on each channel Low drift sensor excitation is provided for RTD strain gage LVDT and AD590 models RT
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