FireWatcher 521 Intelligent Heat Detector
The FW521 is an intelligent Heat Detector UL listed device according to UL 521 and ULC-S530 for Fire Protective Signaling Systems for indoor use with both fixed-temperature alarm and rate-of-rise alarm characteristics. It features a slim design which combines visual appeal with a high standard of reliability. The detector has a Microcontroller Unit (MCU) performing comprehensive self-diagnostic tests, and result analysis. The FW521 is intelligent, addressable, and takes one address on the Signaling Line Circuit (SLC) of the fire alarm control panel.
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