FW2321 – ALU (Addressable loop unit)

The FW2321 Addressable Loop Unit (ALU) is subassembly of model FW2105 Fire Alarm Control Panel. One ALU can support one addressable loop circuit, which supports up to 252 points of addressable devices. The daughter board (sub-ALU) can be mounted on ALU to expand another SLC.
It’s UL listed according to UL 864 and ULC-S524 for Fire Alarm Systems.