System Sensor 2451 is a plug-in photoelectronic smoke detector, 24V. It plugs into a separate base, so wiring is set by the base you choose.
The 2451 series uses an optical sensing chamber designed so that an LED failure will not cause an alarm. Two visible LEDs flash every ten seconds to show power is applied and light steadily in alarm, with a 360-degree viewing angle. The detector is sealed against dirt, insects and back pressure, and the insect screen and cover are removable for field cleaning.
Features
- Plug-in head with a built-in tamper-resistant feature
- Built-in test switch; magnet test puts the detector into alarm within 5 seconds
- Field metering of detector sensitivity with a voltmeter and the MOD 400R test kit
- Compatible with FCI control panels
- Plugs into the same bases as the 1451 series ionization detectors
Specifications
| Model |
2451 |
| Voltage range |
8.5 to 35 VDC (24 VDC nominal) |
| Sensitivity |
3.0 %/ft |
| Operating temperature |
32°F to 120°F (0°C to 49°C) |
| Humidity |
0% to 93% relative humidity |
| Size |
6.2 in diameter, 3.3 in high; 0.5 lb |
| Duct use |
UL certified for mounting inside ducts up to 3,000 ft/min |
Compatible bases
- B401B: two-wire base
- B402B: four-wire base, 24 VDC
- 301B4AC: four-wire base, 120 VAC
Related models
The 2451T is the same detector with a built-in 135°F fixed temperature thermal element. If you are matching an older 2451TH, see the System Sensor 2151, which is titled as its replacement.
Specifications are taken from the System Sensor 2451 data sheet (9020-0585). Manufacturer specifications are subject to change without notice.
