Single Input Device

Product Overview

The Single Input Device is designed to monitor the state of one or more single pole, voltage free contacts connected to a single pair of cables and to report the status to the Ampac fire detection control panel.

Monitoring of the external cables is provided for open and short circuit fault conditions and the input circuit itself is conditioned with de-bounce circuitry for enhanced noise rejection. The input circuit is also protected against high transient voltages.

The Ampac Single Input Device is loop powered and incorporates bi directional isolation circuitry to provide protection against detection loop short circuits. On board LED status indication is provided for service and commissioning purposes, a feature that can be deactivated during normal operation to reduce the current draw on the system.

Two packaging options are available. The ‘DIN Mount’ version enables the device to be mounted onto standard 35mm DIN rail or screwed direct to the back pan of a larger enclosure while the ‘Enclosed’ version allows the device to be surface mounted to a wall.


  • Loop Powered
  • Monitored Input
  • Compatible with XP95 & Discovery Protocol
  • Built In Short Circuit Isolator
  • Low Power Consumption
  • Diagnostic LED Indications
  • Surface Mount Enclosure
  • DIN Rail Mount Option



Operating Voltage

17 – 28V DC

Max Current @ 24 V DC

Quiscent Current

Input On




Operating Temp.

-20°C +70°C


0 to 95% Non-condensing


DIN Mount


(H x W x D)

75mm x 110mm x 25mm

150mm x 200mm x 52mm


Grey ABS

IP Rating

IP44 (indoor use)

Item Numbers


Single Input Device DIN Mount


Single Input Device Enclosed