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

  • MPN: 281B-PL
  • JMAC ID: 200004056
$8.19
JMAC_ID:
200004056
df_manual_boost:
1.75
Please Note: In order to keep our prices low, we have a minimum order requirement of $99
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.
  • 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
  • Pure white finish
  • Low profile with mounting plate
  • Single pole — normally open contact
  • UL listed for 50 ft. (15.2m) spacing

2 Reviews

  • 5
    EDWARDS-SIGNALING-281B-PL

    Posted by 159176 on Aug 1st 2020

  • 5
    EDWARDS-SIGNALING-281B-PL

    Posted by 137021 on Jan 21st 2019

Live Chat