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Analog Current Input Modules with Voltage-Output

8B modules are an optimal solution for monitoring real-world process signals and providing high-level signals to a data acquisition system. Each 8B32 module isolates, filters, and amplifies a 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 70 dB of normal-mode rejection at 60 Hz. One pole of this filter is on the field side of the isolation barrier for anti-aliasing, and the other two are on the system side.

A special input circuit on the 8B32 module provides protection against acciden-tal 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 optical 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 SensorLex8B32

Block Diagram SensorLex8B32

PDF Downloads:

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

  • 2 Modules for Type Sensorlex8B32:

    8B32-01 4 mA to 20 mA SensorLex8B32 Isolated Analog Current Input Module with Voltage-Output
    8B32-02 0 mA to 20 mA SensorLex8B32 Isolated Analog Current Input Module with Voltage-Output


    • Input: mA Signal
    • Output: 0 V … 5 V
    • Bandwidth 3 Hz
    • Isolation 1500 Vrms
    • Input protection 240 VAC
    • Input Resistance < 50 Ohm
    • Accuracy ± 0.05%
    • Linearity ± 0.02%
    • ANSI/IEEE C37.90.1 Input protection
    • CMR 120dB
    • True 2-way isolation
    • NMR: 70dB at 60Hz
    • 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