C&K systems 236i-WRX Manual page 7

Narrowband wireless receiver with 2 x code hopping remote controls

The 236i - WRX will activate the fault output (it will switch low for 2 seconds) to indicate that the detector has a flat

battery.

The tamper output will switch low for 2 seconds whenever the front case is removed and the tamper switch is released

on a Wireless PIR Detector or Wireless Reed Switch.