LIM800 Ancillary line isolator module with M520 front cover

LIM800 Ancillary line isolator module with M520 front cover

The LIM800 is an MX Addressable Loop Isolator Module that can be used to provide short circuit isolation between zones or portions of the MX addressable loop. LIM800s are installed at appropriate positions around the MX loop to monitor the loop voltage either side of the device. If the voltage drops to zero volts (e.g. due to a short), the two LIM800s either side of the short open their electronic switches and isolate the shorted section allowing the rest of the loop to be driven by the MX Control and Indicating Equipment (c.i.e.).