M501M System Sensor Mini Monitor Module The M501M System Sensor monitor module can be installed in a single gang junction box directly behind the monitored unit. Its small size and lightweight allow it to be installed without rigid mounting.
The M501M is intended for use in intelligent, two-wire systems where the individual address of each module is selected using rotary decade switches.
It provides a two-wire initiating circuit for normally open contact fire alarm and security devices.
