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2-Wire Interface Modules with Voltage-Output, Bandwidth 100 Hz

SensorLex8B42 image

8B modules are an optimal solution for monitoring real-world process signals and providing high-level signals to a data acquisition system. Each 8B42 module provides power to a current transmitter, then isolates, filters, and amplifies the resulting process current input signal and provides an analog voltage output.

Current to voltage conversion is accomplished internal to the module to ensure high accuracy.

Signal filtering is accomplished with a 3-pole filter optimized for time and frequency response which provides 60 dB per decade of normal-mode rejection above 100 Hz.

A special input circuit on the 8B42 module provides protection against accidental connection of power-line voltages up to 40 VAC. Clamp circuits on the I/O and power terminals protect against harmful transients.

Isolation is provided by transformer coupling to suppress transmission of common mode spikes or surges. The module is powered from + 5 VDC, ± 5%.

The modules are designed for installation in Class I, Division 2 hazardous locations and have a high level of immunity to environmental noise.

Circuit diagram Dataforth SensorLex8B42

Block Diagram SensorLex8B42

PDF Downloads:

  • Product Overview SensorLex8B
  • Produkt Catalog SensorLex8B
  • Backpanels and Accessories

  • 2 Modules for Type SensorLex8B42:

    8B42-01 4 mA to 20 mA SensorLex8B42 Isolated 2-Wire Interface Module with Voltage-Output
    8B42-02 4 mA to 20 mA SensorLex8B42 Isolated 2-Wire Interface Module with Voltage-Output


    • Input: mA-Signal
    • Output: 0 V … 5 V / 1 V … 5 V
    • Bandwidth 100 Hz
    • Isolation 1500 Vrms
    • Input protection 40 VAC
    • Input Resistance 50 Ohm
    • Accuracy ± 0.05%
    • Linearity ± 0.02%
    • ANSI/IEEE C37.90.1 Input protection
    • CMR 100dB
    • True 2-way isolation
    • NMR: 100dB / Decade > 100 Hz
    • Power Supply +5 VDC
    • Operating Temperature Range -40°C … +85°C
    • Mix and Match Types on Backpanels possible
    • Dimensions 28.1 x 41.9 x 10.2 mm
    • Optional DIN Rail Mounting
    • CE compliant, C-UL-US Listed
    • Wide range of accessories
    • Special Solutions on request