The SENSOR DECODER may be used either as a “SENSOR” Decoder or as a “PULSE” Decoder. The decoder is told by the central system what type of device it is when it makes contact with the system.
When used as a “PULSE” Decoder it is connected to a Pulse Flow Meter and sends the pulse back to the Central Control System computer through the MDI Interface Unit for action then to be taken by the Central System.
Manufacturer Link
When used as a “SENSOR” Decoder it can be connected to any type of sensing device that has a mechanical “DRY” switch action for the threshold setting, either an “OPEN” switch at the threshold or a “CLOSED” switch at the threshold and with NO voltage or frequency being involved. The SENSOR status changes are transmitted through the MAXI Two-Wire communication path and the MDI Interface unit to the Central Control System Computer, where proper system action can take place.