SCM5B42 2-Wire Transmitter Interface Modules

from 222,64 €
excl. 19% VAT , plus shipping costs (Standard)
From Unit price
5 237,82 € *
10 230,23 € *
20 222,64 € *
  • Isolated +20VDC Current Loop Supply
  • Provides Isolation for Non-Isolated 2-Wire Transmitters
  • 100Hz Signal Bandwidth
  • ATEX Compliant

  • Input Range 
  • Output Range 

This item has variations. Please select the requested variation.

  • Isolated +20VDC Current Loop Supply
  • Provides Isolation for Non-Isolated 2-Wire Transmitters
  • High-Level Voltage Output +1V to +5V or +2V to +10V
  • 1500Vrms Transformer Isolation
  • ANSI/IEEE C37.90.1 Transient Protection
  • 100dB CMR
  • 100Hz Signal Bandwidth
  • ±0.03% Accuracy / ±0.005% Linearity
  • ATEX Compliant

Each SCM5B42 2-wire transmitter interface module provides a single channel which accepts a 4 to 20mA process current input and provides a standard +1 to +5V or +2 to +10V output signal . 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 SCM5B42 without requiring an external power supply. The regulated supply will provide a nominal +20VDC at a loop current of 4mA to 20mA.

The SCM5B42 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 SCM5B 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 20 ohm current conversion resistor is supplied with the module. Sockets are provided on the SCMPB01/02/03/04/05/06/07 backpanels to allow installation of this resistor. Extra resistors are available under part number SCMXR1. 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.


Category: Signal Conditioning
Output Type‍: Analog
Input Type‍: Milliamps
Module series‍: 5B Series