Soteria Twin Switch Monitor Unit

Product Overview

The Soteria Twin Switch Monitor Unit provides the function of two Switch Monitor units within one enclosure. The two units are electrically independent of each other. There is a DIL switch on each unit to set the address.

Both Switch Monitor units in the enclosure are designed to monitor the state of one or more single pole, volt-free contacts connected on a single pair of cables to report the status. It has a selectable status reporting delay making it suitable for monitoring flow switches.


  • Improved design for ease or wiring, meaning faster installation
  • Short circuit isolator
  • Address range 1 – 126
  • Compatibility with XP95 and Discovery protocol


Supply Voltage (Vmin—Vmax)

17 to 35V dc


5-13V peak to peak

Power-up surge current

900µA per Switch Monitor

Quiescent current

500µA per Switch Monitor

Max Current LEDs On

2mA per Switch Monitor

Max current LEDs disabled

500µA per Switch Monitor

Isolator data

Refer to short-circuit isolation  datasheet PDS201-9001

Operating Temperature

-40°C + 70°C


0% to 95% RH (no               condensation or icing)   

Vibration, impact and shock

EN54-17 & EN54-18

Standards & Approvals

EN54-17, EN54-18, CPR and LPCB


60mm height x 150mm width x 90mm depth




Item Numbers


Soteria Twin Switch Monitor Unit