FSI-851

The NOTIFIER FSI-851 is an intelligent addressable ionization smoke detector from the 851 Series, designed for FlashScan and CLIP SLC systems in ONYX panels like NFS2-640 and NFS2-3030.
It features a unique single-source dual-chamber design for rapid detection of fast-flaming fires, rotary dial addressing (1-159 FlashScan), continuous sensitivity monitoring with panel-programmable thresholds, and plug-in compatibility with B501 bases.
Key Specifications
Feature
Specification
Type
Ionization smoke detector (FSI-851(A))​
Sensitivity
Panel-programmable; continuous monitoring ​
Voltage
15-32 VDC (SLC loop-powered) ​
Current
Standby: 300 µA max; Alarm: 6.5 mA @ 24 VDC ​
LEDs
Dual bicolor (green blink normal, red steady alarm) ​
Base
B501 series (standard/relay/isolator/sounder) ​
Temp/Humidity
32°F-120°F (0°C-49°C); 10-93% RH ​