Specifications
Electrical Specifications
- Operating Voltage Nominal: 12/24 V non-polarized
- Minimum: 8.5 V
- Maximum: 35 V
- Maximum Ripple Voltage 30% peak to peak of applied voltage
- Standby Current 2-wire: 50 μA maximum average; 4-wire: 50 μA maximum average
- Maximum Alarm Current 2-wire: 130 mA limited by control panel; 4-wire: 20 mA @12 V, 23 mA
Physical Specifications
- Dimensions (including base) 5.3 inches (127 mm) diameter; 2.0 inches (51 mm) height
- Weight 6.3 oz (178 g)
- Operating Temperature Range 2W-B and 4W-B: 32°F to 120°F (0°C to 49°C); 2WT-B and 4WT-B: 32°F to 100°F (0°C to 37.8°C)
- Operating Humidity Range 0 to 95% RH non-condensing
- Thermal Sensor 135°F (57.2°C) fixed
- Freeze Trouble 2WT-B and 4WT-B only: 41°F (5°C)
- Sensitivity 2.5%/ft nominal
- Input Terminals 14 to 22 AWG
- Mounting 3½-inch octagonal back box
- 4-inch octagonal back box
- Single-gang back box
- 4-inch square back box with a plaster ring
- Direct mount to ceiling
Agency Listings and Approvals
- UL/ULC
- FM Approved
- CSFM
- FDNY