Low voltage opto-isolator module.
Product Code - MRM-NC

The OST MicroRelay Module allows the aPod Controller to be interfaced to external devices such as an alarm panel or an automatic door opener while remaining electrically isolated.  It is installed in-line with the connecting circuit using the attached fly leads.

Refer to the aPod Installation Guide for wiring instructions.

Product Code MRM-NC (blue) is a Form B (normally closed) relay.