Features:

UL listed for 50 ft. (15.2m) spacing

Single pole normally open contact

Low profile with mounting plate

Pure white finish

Mounting flexibility with screw terminals

Easy twist-on installation

On-site testing of rate-of-rise feature

Positive operating indication for fixed temperature element

Agency Listings UL, FM, CSFM

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.

Technical Specifications:

UL Temperature Rating: 135F (57C)

UL Max Ambient Temp. at Ceiling: 100F (38C)

Rate-of-rise: 15 F (9 C), self restoring

UL Recommended Coverage: 2,500 ft. (232 m)

UL Recommended Spacing: 50 ft. (15.2 m)

FM Recommended Spacing: 30 ft. (9.14 m)

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)

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

Evironment: Indoors and Dry