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Model DI-5B42-01

Isolated 4-20mA 5B-style Amplifier

$255 each
  • Isolated +20VDC Current Loop Supply
  • Provides Isolation For Non-Isolated 2-Wire Transmitters
  • High Level Voltage Output: +1V to +5V
  • 1500Vrms Transformer Isolation
  • ANSI/IEEE C37.90.1-1989 Transient Protection
  • Input Protected to 240VAC Continuous
  • 100dB CMR
  • 100Hz Signal Bandwidth
  • ±0.05% Accuracy
  • ±0.02% Linearity
  • CSA Certified
  • View Dimensions and pinout
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DI-5B DAQ Amplifiers
This amplifier module measures 4-20mA.This amplifier module has 100Hz bandwidth.This data acquisition system has a 30-day Money back guaranteeThis amplifier is manufactured in the United States of America


Each DI-5B42 2-wire transmitter interface module provides a single channel which accepts a 4 to 20 mA process current input and provides a standard +1 to +5V output signal (see block diagram). An isolated +20VDC regulated power supply is provided to power the current transmitter. This allows a 2-wire loop powered transmitter to be directly connected to the DI-5B42 without requiring an external power supply. The regulated supply will provide a nominal +20VDC at a loop current of 4mA to 20mA.

The DI-5B42 will provide a 1500V isolation barrier for non-isolated 2-wire field transmitters. It can also be used when additional isolation is required between an isolated 2-wire transmitter and the input stage of the control room computer. The voltage output is logic switch controlled, which allows these modules to share a common analog bus without the requirement of external multiplexers.

The DI-5B modules are designed with a completely isolated computer side circuit which can be floated to ±50V from Power Common, pin 16. This complete isolation means that no connection is required between I/O Common and Power Common for proper operation of the output switch. If desired, the output switch can be turned on continuously by simply connecting pin 22, the Read-Enable pin to I/O Common, pin 19.

A precision 20Ω current conversion resistor is supplied with the module. All field inputs are fully protected from accidental connection of power-line voltages up to 240VAC. The module has a 3dB bandwidth of 100Hz.

Signal filtering is accomplished with a six-pole filter, with two poles on the field side of the isolation barrier, and the other four on the computer side.



16-Position Backplane

$ 409
16-channel backplane for 5B modules


16-channel backplane for 5B modules. Each module has its own analog bus. For use with DI-5B Modules.


1-Position Backplane

$ 55
Single-channel backplane for 5B modules


Single-channel backplane. For use with DI-5B Modules.


2-Position Backplane

$ 129
Dual-channel backplane for 5B modules


Dual-channel backplane. For use with DI-5B Modules.


8-Position Backplane

$ 305
Dual-channel backplane for 5B modules


8-position analog I/O backplane, non-multiplexed. For use with DI-5B Modules.


Base Element

$ 10
Base element with snap foot


Base element with snap foot required for use with models DI-5B03 and DI-5B04 Backplanes. For use with DI-5B Modules.


Power Supply

Power Supply


5V DC Power Supply for use with both DI-5B and DI-8B Backplanes.


Side Element

$ 5
Side element


Side element required for use with models DI-5B03 and DI-5B04 Backplanes. For use with DI-5B Modules and Backplanes.


Input Range: 4mA to 20mA
Input Resistor: Value: 20.00Ω
Accuracy: ±0.1%
Stability: ±10ppm/ºC
Loop Supply Voltage: Nominal 20V at 4mA to 20mA
Isolated Excitation Protection: Continuous: 240Vrms max
Transient: ANSI/IEEE C37.90.1-1989
Input Protection: Continuous: 240Vrms max
Transient: ANSI/IEEE C37.90.1-1989
CMV, Input to Output: Continuous: 1500Vrms max
Transient: ANSI/IEEE C37.90.1-1989
CMR (50Hz or 60Hz): 100dB
NMR: 120dB per Decade above 100Hz
Accuracy: ±0.05% Span ±4µA RTI (Includes nonlinearity, hysteresis and repeatability; RTI=Referenced to input; VZ is the input voltage that results in 0V output.)
Nonlinearity: ±0.02% Span
Stability: Input Offset: ±1µV/°C
Output Offset: ±40µV/°C
Gain: ±25ppm/°C of reading
Noise: Input, 0.1 to 10Hz: 10nArms
Output, 100kHz: 500µVrms
Bandwidth, -3dB: 100Hz
Response Time, 90% Span: 4ms
Output Range: +1V to +5V
Output Resistance: 50Ω
Output Protection: Continuous Short to Ground
Output Selection Time:
(to ±1mV of Vout)
6µs at Cload = 0 to 2000pF
Output Current Limit: ±20mA max
Output Enable Control: Max Logic “0”: +0.8V
Min Logic “1”: +2.4V
Max Logic “1”: +36V
Input Current, “0”, “1”: 0.5µA
Power Supply Voltage: +5VDC ±5%
Power Supply Current: 180mA at load of 20mA
100mA at load of 4mA
Power Supply Sensitivity: ±10µV/% RTI
(RTI=Referenced to input.)
Mechanical Dimensions: 2.28" × 2.26" × 0.60"
(58mm × 57mm × 15mm)
Operating Temperature: -40ºC to +85ºC
Storage Temperature: -40ºC to +85ºC
Relative Humidity: 0 to 95% Noncondensing
RFI Susceptibility: ±0.5% Span Error at 400MHz, 5W, 3ft

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