The M500DMR Addressable Multiple Monitor & Relay Module is an intelligent interface module designed for addressable fire alarm systems, providing two supervised monitor inputs and two Form-C relay outputs within a single compact device. It enables reliable monitoring of external contacts and control of field equipment while reducing the number of modules required on the addressable loop.

The M500DMR supports operating voltages from 15–32 VDC and occupies up to four addresses on the signalling loop, with the option to disable the second input and relay via onboard DIP switches when fewer addresses are required. Each input is fully supervised using a 47 kΩ end-of-line resistor, while individual red LED indicators provide clear visual status for each monitor input and relay output.

Designed for flexibility, the M500DMR can be surface mounted, DIN rail mounted, or panel mounted, making it suitable for a wide range of fire detection and life safety applications. Typical uses include monitoring sprinkler flow and valve tamper switches, fire pump status, generator alarms, emergency shutdown systems, and controlling auxiliary equipment such as fans, dampers, door holders, and warning devices.

Key Features

• Two supervised Class B monitor inputs
• Two Form-C relay outputs
• Operating voltage: 15–32 VDC
• Uses up to four addressable loop addresses
• DIP switch selectable address reduction
• Individual LED indication for each input and relay
• Compact design with multiple mounting options
• Ideal for monitoring and controlling external equipment on addressable fire alarm systems

The M500DMR provides a cost-effective and reliable solution for integrating field devices with addressable fire alarm control panels while maintaining full system supervision and operational flexibility.