• Notifier FST-851(A) Series intelligent plug-in thermal detectorswith integral communication has features that surpass conventional detectors. Point ID capability allows each detector’s
  address to be set with rotary, decimal address switches, providing exact detector locations. FST-851(A) Series thermal detectors use an innovative thermistor sensing circuit to produce 135°F/57°C fixed-temperature (FST-851/A) and rate-ofrise thermal detection (FST-851R/A) in a low-profile package.
• FST-851H(A) provides fixed high-temperature detection at 190°F/88°C. These thermal detectors provide effective, intelligent property protection in a variety of applications. FST851(A) Series detectors are compatible with Notifier Onyx and CLIP series Fire Alarm Control Panels (FACPs).

• Sleek, low-profile, stylish design.
• State-of-the-art thermistor technology for fast response.
• Rate-of-rise model (FST-851R/A), 15°F (8.3°C) per minute.
• Factory preset fixed temperature at 135°F (57°C); high-temperature model fixed at 190°F (88°C).
• Addressable by device.
• Compatible with FlashScan® and CLIP protocol systems.
• Rotary, decimal addressing (1-99 on CLIP systems, 1-159 on FlashScan systems).
• Two-wire SLC connection.
• Visible LEDs “blink” every time the unit is addressed.
• 360°-field viewing angle of the visual alarm indicators (two bi-color LEDs). LEDs blink green in Normal condition and turn on steady red in Alarm.
• Integral communications and built-in device-type identification.
• Remote test feature from the panel.
• Built-in functional test switch activated by external magnet.
• Walk test with address display (an address of 121 will blink the detector LED 12-(pause)-1).
• Low standby current.
• Backward-compatible.
• Built-in tamper-resistant feature.
• Designed for direct-surface or electrical-box mounting.
• Sealed against back pressure.
• Plugs into separate base for ease of installation and maintenance. Separate base allows interchange of photoelectric, ionization and thermal sensors.
• SEMS screws for wiring of the separate base.
• Constructed of off-white fire-resistant plastic, designed to commercial standards, and offers an attractive appearance

• 94-5V plastic flammability rating.
• Remote LED output connection to optional RA100Z(A) remote LED annunciator.
• Optional sounder, relay, and isolator bases.
• Optional flanced surface mounting kit

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FST-851 Intelligent Thermal (Heat) Detectors with FlashScan®

• Size: 2.1" (5.3 cm) high; base determines diameter.
  – B210LP(A): 6.1" (15.5 cm) diameter.
  – B501(A): 4.1" (10.4 cm) diameter.
  – B200S(A): 6.875" (17.46 cm) diameter.
  – B200SR(A): 6.875" (17.46 cm) diameter.
  – B224RB(A): 6.2" (15.748 cm) diameter.
  – B224BI(A): 6.2" (15.748 cm) diameter.
  Shipping weight: 4.8 oz. (137 g).
• Operating temperature range: FST-851(A) Series, FST-851R(A): –20°C to 38°C (–4°F to 100°F); FST-851H(A): –20°C to 66°C (–4°F to 150°F).
  Detector spacing: UL approved for 50 ft. (15.24 m) center to center. FM approved for 25 x 25 ft. (7.62 x 7.62 m) spacing.
• Relative humidity: 10% – 93% noncondensing.
• Thermal ratings: fixed-temperature setpoint 135°F (57°C), rate-of-rise detection 15°F (8.3°C) per minute, high temperature heat 190°F (88°C).

• ELECTRICAL SPECIFICATIONS
  Voltage range: 15 - 32 volts DC peak.
  Standby current (max. avg.): 300 A @ 24 VDC (one communication
  every 5 seconds with LED enabled).
  LED current (max.): 6.5 mA @ 24 VDC (“ON”).

• UL Listed: S747.
• ULC Listed: S6978.
• MEA Listed: 383-02-E.
• FM Approved.
• CSFM: 7270-0028:0196.
• BSMI: CI313066760025.
• CCCF: Certif. # 2004081801000018.
• U.S. Coast Guard: 161.002/42/1 (NFS-640); 161.002/50/0 (NFS2-640/NFS-320/NFS-320C, excluding B210LP(A)).
• Lloyd’s Register: 11/600013 (NFS2-640/NFS-320/NFS-320C, excluding B210LP(A)).