M500M-4-20

The M500M-4-20 Analog Input Module allows the connection of 4-20 mA output sensors to a ire alarm control panel (FACP).  The module converts the sensor output to a common communication protocol that can be interpreted by the FACP for monitoring and display.  There are numerous sensors available in the marketplace that communicate using a 4-20 mA output, including gas sensors, temperature sensors, air speed sensors, and more.

The M500M-4-20 Module includes numerous safeguards and protective features to ensure trouble-free operation.  The module accepts both 3-wire (device sink) and 2-wire conigurations.  The external power supply is isolated from the communication line.  In addition, a 500 mA current limiter and a cutof circuit protect the module's electrical supply from short circuits.  In the event of ashort, the output voltage will cycle within safe limits until the short is removed.  The output signal is sampled and iltered for transients and noise prior to passing the signal on to the FACP.  If the current running through the sensing circuitry exceeds 25 mA, the output voltage will shut down and the short protection process will begin. 

As with all of the System Sensor intelligent modules, the M500M-4-20 Analog Input Module is rigorously designed and tested for electromagnetic compatibility and environmental reliability, in most cases exceeding industry standards.  The device is equipped with a panel-controlled red LED for local status indication. The standard SEMS terminals will accept wiring from 18ga to 12ga (AWG).