The System Sensor D4P120 is a conventional 4-wire photoelectric smoke detector. It is part of the System Sensor 4-wire D-series. As a result, it works with conventional fire alarm control panels that supply 4-wire smoke loop power.
The detector uses photoelectric (light-scattering) sensing. In addition, it requires a separate power feed and an alarm initiating loop — that’s what “4-wire” means.
How a 4-Wire Smoke Detector Differs from 2-Wire
A 4-wire detector takes power on a dedicated pair. Then it signals alarm on a separate initiating pair. Specifically, that lets the detector keep operating LEDs, sounders, or relays that 2-wire loop power cannot support.
However, 4-wire detectors require end-of-line supervision on the power pair. Therefore, the installation must include a power-supervision relay or end-of-line module to meet code.
Key Features
- Conventional 4-wire photoelectric smoke detection
- Light-scattering sensing chamber
- System Sensor D-series form factor
- For use with conventional 4-wire smoke loops
Specifications
- Manufacturer: System Sensor
- Part number: D4P120
- Detection mode: photoelectric
- Wiring: 4-wire conventional
Order the System Sensor D4P120
Life Safety Consultants stocks the D4P120. To confirm 4-wire smoke loop compatibility with your panel, call 1-888-557-0558. Alternatively, email sales@lifesafetycom.com.
For more information, contact the Life Safety Consultants team at (888) 557-0558, or email us at: sales@lifesafetycom.com
Additional information
| Weight | 2 lbs |
|---|---|
| Dimensions | 16 × 6 × 4 in |
| Condition | New |
| Manufacturers | System Sensor |
| Part Type | Photoelectric Smoke Detector |
