FW2821 is an intelligent and addressable input-output module listed device according to UL864 and ULC-S527 for fire protective signaling systems for indoor use. It takes one address on the SLC or DCL of the fire alarm control panel.

The FW2821 offers a single 24VDC output and an input switch. It monitors for open line faults and ground faults on the input side, while on the output side, it keeps track of open line, short circuit, ground faults, and the loss of the external 24VDC power source. Input switch can be configurable for 4 types:

Alarm

Supervisory

Trouble

Monitor or feedback