Mircom’s monitor modules provide an interface to contact devices, such as security contacts, waterfl ow switches, or manual stations. They are capable of Styles A and B supervised wiring to the load device (MIX-M500M is capable of Style D). Conventional 4-wire smoke detectors can be monitored through their alarm and trouble contacts, wired as an initiating loop to the module. 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 impedance changes in the supervised loop to the monitored device to be detected. The MIX-M500DM is capable of monitoring two separate Class B circuits simultaneously, making it ideal for waterfl ow tamper switch and fl ow switch monitoring. The small size of the MIX-M501M allows it to fi t inside devices or junction boxes behind devices.