System Sensor 2412A Photoelectric Smoke Detector

System Sensor 2412A and 2424 photoelectronic smoke detectors utilize state-of-the-art, optical sensing chambers. Also, these detectors come designed to provide open area protection, and to be use with compatible UL-listed 4-wire control panels only. Besides, the System Sensor 2412A applies to 12 volt panels and operates at 12VDC, and the 2424 applies to 24 volt panels and operates at 24VDC. Operation and sensitivity can be test in place. Models 2412TH and 2424TH have the same specifications as models 2412 and 2424, but in addition feature a built-in fixed temperature (135°F) thermal detection unit.

An LED on each detector lights to provide a local alarm indication. It flashes every ten seconds indicating that power is apply to the detector. The LED lights continuously in alarm. These detectors also have the latching alarm feature that resets only by a momentary power interruption.

In general, each detector contains one set of Form A contacts for connection to the alarm-initiating circuit, and one set of Form C auxiliary contacts. Supervision of detector power is accomplished by installing a Power Supervisory End-of-Line Relay Module (A77-716 Series) at the end of the detector power loop. When power is applied to and through the detectors, the EOL Power Supervisory Module is energized. Furthermore, its relay contacts close and provide a closed series circuit in the control panel’s alarm-initiating loop. In addition, a power failure or a break in the detector power loop de-energizes the EOL Module. The relay contacts open as well as trigger a trouble signal at the control panel.

Features / Specifications

• Diameter: 5.5 inches (14 cm)
• Height: 3.19 inches (81 mm); Add 0.5 inches (1.3 cm) for thermal units
• Operating Temperature Range: 0°C to +49°C (32°F to 120°F)
• Operating Humidity Range: 10% to 93% Relative Humidity
• Maximum Air Velocity: 3000 Ft./Min. (15 M/S)
• Latching Alarm: Reset by momentary power interruption.

Download the Specification sheet in *.pdf format

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