Process Current Input Module MODEL 5B42 True three-port isolation
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FEATURES Accepts 4-to-20 Process Current Input Signal Provides Isolation Regulated Loop Power Nonisolated 2-Wire Transmitters Output 1500 Input/Output Input/Power Isolation Output/Power Isolation Common-Mode Rejection Signal Bandwidth Accuracy: 0.05% Linearity: 0.01% Field Wiring Protection Protected Internal Current Sense Resistor ANSI/IEEE C37.90.1-1989 Transient Protection CSA, Approvals GENERAL DESCRIPTION
Process Current Input Module MODEL 5B42
True three-port isolation includes common-mode voltage 1500 between input output, between input power; between output power. Accurate performance maintained over wide -40°C +85°C operating temperature range. 5B42's drift design achieves output offset drift only µV/°C gain drift ppm/°C. 5B42 offers significant advantages over signal conditioners that require external current sense resistor. external resistor protected from accidental connection line voltages, error tolerance must added conditioner's specified errors. 5B42 trimmed specified including internal current-sense input resistor. 5B42 signal input, loop supply sense resistor protected against accidental application voltages, such power line, continuous. There need install external resistor backplane, installed, effect 5B42 performance. module bandwidth optimized 5-pole signal filter with overshoot exceptional output noise performance peak-to-peak bandwidth. 5B42 logic-controlled series output switch eliminates need external multiplexing many applications. This output resistance switch controlled active enable input. When output switch used, ground enable input common turn switch.
Model 5B42 interfaces with 2-wire transmitters convert their 4-to-20 process current signal into high accuracy output module provides 1500 isolation with CMR, regulated loop power 4-to-20 loop current), signal filtering, input protection against accidental line voltage connection. industry standard Series encapsulated plug-in modular package compatible with backplanes. Modules powered ±5%. Signal isolation provided transformer coupling using proprietary technique linear, stable performance. demodulator output side signal transformer recovers input signal, which filtered buffered provide accurate, impedance, noise output.
FUNCTIONAL BLOCK DIAGRAM
BACKPLANE
5B42
+EXC
PROTECTION
ACTIVE 4-POLE
VOUT
ISOLATION
2-WIRE TRANSMITTER
REGULATED LOOP SUPPLY
ISOLATED OUTPUTSIDE POWER
ISOLATED FIELDSIDE POWER
POWER OSCILLATOR
ISOLATED INPUT SECTION
ISOLATED OUTPUT SECTION
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Information furnished Analog Devices believed accurate reliable. However, responsibility assumed Analog Devices use, infringements patents other rights third parties which result from use. license granted implication otherwise under patent patent rights Analog Devices. Technology Way, P.O. 9106, Norwood, 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Site: http://www.analog.com Fax: 781/326-8703 Analog Devices, Inc., 1997
MODEL 5B42-SPECIFICATIONS (typical
Model INPUT Standard Ranges Custom Range Limits Input Resistor1 Loop Supply Voltage Normal-Mode Rejection (NMR) Input/Excitation/Sense Resistor Protection Continuous Transient COMMON-MODE VOLTAGE (CMV) Input-to-Output, Continuous Input-to-Power, Continuous Power-to-Output, Continuous2 COMMON-MODE REJECTION (CMR) Hz/60 ACCURACY Initial +25°C4 Nonlinearity Stability Temperature (-40°C +85°C) Input Offset Output Offset Gain OUTPUT Range (See Tables 5B42-01 5B42-02 Resistance Bandwidth, Step Response Time (90% Span) Noise Input, Output, Protection Current Limit Enable Time Load 2000 Enable Control Logic Logic Logic Input Current "0," POWER SUPPLY Voltage, Rated Performance Current Transmiter Load Transmitter Load Sensitivity CASE SIZE, Maximum WEIGHT ENVIRONMENTAL Temperature Range, Rated Performance Storage Temperature Relative Humidity Susceptibility
5B42 (See Table (See Table Decade Above ANSI/IEEE C37.90.1-1989 1500 rms, 1500 rms, rms, 0.05% Span RTI5 0.01% Span µV/°C µV/°C Reading/°C
Table Standard Model Input/Output Ranges* Model 5B42-01 5B42-02 Input Range Output Range
C3210-2-10/97 PRINTED U.S.A.
*Custom input/output ranges available. Table
Table Custom Model Ordering Guide Order Model: 5B42-CUSTOM plus Customer Specified Information Customer Specified Information: Input Range Output Range High Available Range Limit Limit
*There loop power supplied 5B42 input.
pk-pk Continuous Short Ground VOUT +0.8 +2.4 µV/% RTI5 2.275" 2.325" 0.595" (57.8 59.1 15.1 grams -40°C +85°C -40°C +85°C +40°C, Noncondensing 0.5% Span Error MHz,
NOTES precision current-sense input resistor internal 5B42. user's board layout must separate Power Ground from Common when 5B42 output switch used, ground enable input Common. Power-to-Output available when 5B42 installed Series backplane. shielded cable from signal source 5B42 inputs recommended maintain performance. Includes combined effects repeatability, hysteresis nonlinearity. Referenced Input. Specifications subject change without notice.
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