The PW-330MM is an addressable, intelligent monitor module that interfaces with a host control panel to supervise dry-contact initiating circuits. The module tracks the state of external passive switches, relaying real-time circuit status back to the FACP. The onboard LED status indicator provides visual diagnostics by flashing under normal standby conditions, latching steady-on during an active alarm state, and supporting software-defined deactivation. For increased installation efficiency and error reduction, the signaling line circuit (SLC) terminals feature a polarity-insensitive connection design.