The PW-330MMC is an intelligent, four-wire Input/Output Module featuring dual independent channels: one dedicated input and one supervised output. Two distinct LEDs provide real-time status indication for each channel.

The input channel monitors dry (passive) switch contact inputs and reports their status to the fire alarm control panel. Under normal conditions, the input LED flashes; it illuminates steadily to indicate a short-circuit fault, and it can be deactivated if required for specific applications. The output channel controls a 24VDC power supply output, which is electrically isolated from the system’s communication circuit. Using an end-of-line (EOL) terminal resistor, the output channel continuously monitors the external circuit for normal, open-circuit, short-circuit, and power supply fault conditions, transmitting this data back to the panel. The output LED flashes during standby, latches on when activated, and can be disabled if necessary. For streamlined installation, the communication, power supply, and input circuits all utilize a non-polarized wiring design.