Edwards 281B-PL 135 Deg. F. R.O.R./Fixed Heat Detector

Edwards 281B-PL 135 Deg. F. R.O.R./Fixed Heat Detector
Item# EDWS_281B-PL

Product Description

280B-PL Series heat detectors offer fixed temperature or combination rate-of-rise and fixed temperature detection. A temperature increase at the sensor of 15F (9C) or more per minute activates the rate-of-rise feature, closing 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. If the temperature of the center disk rises to the sensors rated temperature, the fixed temperature element activates, closing contacts in the sensor and transmits an alarm condition to the fire alarm control panel. The fixed temperature element is non-restorable and, when activated, the detector must be replaced. The need for replacement is indicated when the center disk has fallen free from the detector. Edwards 280B series heat sensors come standard with a white plastic reversible mounting plate. The plate is designed for surface or flush mounting and installs directly to a standard North American 3 or 4 inch octagon box. Once the mounting plate is fixed, a simple twist will lock the sensor in place. It can be removed using a screwdriver to release the tamper-resistant locking finger.

Features and Specifications:

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.

Operating temperature range: -22F to 100F (-30C to 37.8C) (281B-PL and 283B-PL); -22F to 150F (-30C to 65.6C) (282B-PL and 284B-PL).

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.