Specifications
Size: 2.1" (5.3 cm) high x 4.1" (10.4 cm) diameter installed in
B501 base, 6.1" (15.5 cm) diameter installed in B710LP base.
Shipping weight: 4.8 oz. (137 g).
Operating temperature range: FST-851 Series, FST-851R: –
20°C to 38°C (–4°F to 100°F); FST-851H: –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.): 200 μA @ 24 VDC (without
communication); 300 μA @ 24 VDC (one communication
every 5 seconds with LED enabled).
LED current (max.): 6.5 mA @ 24 VDC (“ON”).
Bases available:
B710LP: 6.1" (15.5 cm) diameter.
B501: 4.1" (10.4 cm) diameter.
B501BH or B501BHT: Sounder base assembly. Includes
B501 base.
B224RB Relay Base: Screw terminals: up to 14 AWG (2.0
mm²). Relay type: Form-C. Rating: 2.0 A @ 30 VDC resistive;
0.3 A @ 110 VDC inductive; 1.0 A @ 30 VDC inductive.
Dimensions: 6.2" (15.748 cm) x 1.2" (3.048 cm).