System Sensor M500R — addressable 500 Series relay control module with two isolated Form-C contacts.Installers reach for the M500R when the panel must operate something that is not a notification appliance: door holders, elevator recall inputs, HVAC and damper control. It neither powers nor supervises the circuit it switches, so it suits loads whose wiring need not be supervised. Normal operating voltage 15 to 32 VDC Maximum current draw 6.5 mA (LED on); average 300 µA Two isolated Form-C contact sets operating as a DPDT switch Contacts rated 3 A @ 30 VDC resistive non-coded, 2 A @ 30 VDC resistive coded 4.675" H × 4.275" W × 1.4" D; mounts to a 4" square box of 2 1/8" minimum depth The box is supplied by the installer; the SMB500 surface box and CB500 barrier are separate part numbers, and the CB500 is required wherever wiring on terminals 4–10 is non-power-limited. Contacts can transfer in shipping, so make the module communicate with the panel before connecting controlled circuits.
