Conventional detection: 8 zones. Extinguishant control: 2 monitored release areas. Dual extinguishant outputs per area (main/reserve). First- and second-stage sounder outputs. Fault and fire relay contacts (volt-free changeover). Countdown indicator display. Programmable pre-release delay (0–60 s) & output duration (60 s–300 s). Serial RS-485 port connectivity for status units and ancillary boards (Sigma Si, CP boards)