General The module can be installed in a single gang junction box directly behind the monitored unit. Its small size and light weight allow it to be installed without rigid mounting. The module is intended for use in addressable, 2-wire systems where the individual address of each module is written inside the MCU’s EEPROM by the addressable programmer. The input modules provide an interface to contact devices, such as security contacts, water flow switches, or pull stations. In addition to transmitting the supervised state of the monitored device (normal, open, or short), the full analog supervision measurement is sent back to the panel. This allows detection of impedance changes in the supervised loop to the monitored device