Edwards Signaling 281B-PL Heat Detector, Rate-of-Rise & Fixed, 135F Rating

The EDWARDS-SIGNALING-281B-PL is a combination fixed temperature/rate-of-rise detector. The heat detector is available with a white plastic reversible mounting plate which can be used for flush or surface mounting.

The 281B-PL's rate-of-rise operates with an increase at the sensor of 15F (9C) or more per minute. This closes the contacts in the sensor to transmit the alarm condition to the fire alarm control panel. When the rate-of-rise element alone has been activated, the sensor is self-restoring.

The fixed temperature feature of the 281B-PL has a rated temperature of 135F, which when activated, closes contacts in the sensor and transmits an alarm condition to the fire alarm control panel.

UPC: 782640228517
Also known as: ED-281BPL, GES-281BPL, 281BPL

Technical Specifications: Evironment: Indoors and Dry Contacts – Rating: Single Pole Normally Open 3.0 amps at 6 to 125 Vac; 1.0 amp at 6 to 24 Vdc; 0.3 amps at 125 Vdc; 0.1 amps at 250 VDC UL Maximum Distance from Wall: 25 ft. (7.6m) from any wall or projection extending down from the ceiling more than 12 inches (305 mm) FM Recommended Spacing: 30 ft. (9.14 m) UL Recommended Spacing: 50 ft. (15.2 m) UL Recommended Coverage: 2,500 ft.² (232 m²) Rate-of-rise: 15° F (9° C), self restoring UL Max Ambient Temp. at Ceiling: 100°F (38°C) UL Temperature Rating: 135°F (57°C)

For more information about the Edwards Signaling 281B-PL, please contact us.