System Sensor 2312/24TB Photoelectronic 4-Wire Smoke/Fire/Thermal Heat Detectors

Description

Lot of 2 ~ System Sensor 2312/24TB Photoelectronic 4-Wire Smoke/Fire/Thermal Heat Detecto
Pulled from a working system
Thermistors Intact
Cleaned
Shows Yellowing
Mounting bracket included
Model 2312/24TB is a 4-wire combination smoke/heat detector. In addition to photoelectronic smoke detection, two supervised electronic thermistors provide restorable 135°F fixed temperature heat detection. The installation is simplified by the use of an adaptor bracket and a plug-in screw terminal block which can be pre-wired to the system allowing the detector to be easily installed or removed for cleaning. It is designed to provide open area protection, and to be used with UL listed 4-wire control panels. The detector’s sensitivity can be tested in place using the MOD400R field sensitivity test module. The 2312/24TB is listed to UL 268 and is a latching type system detector. When latched in alarm, the detector must be reset by a momentary power interruption. An LED on the detector provides a local indication of the detector’s status. If power is applied to the detector, and the detector is functioning properly in standby, the status LED will blink every 10 seconds. The detector performs a self-test on its smoke sensing chamber and internal electronics every 40 seconds. If this test fails, the detector stops blinking the status LED in standby, and the LED will remain off. In alarm, the LED will be latched on continuously until the detector is reset.
Diameter: 5.5 inches (14 cm)
Height: 2.5 inches (6.4 cm)
Weight: 0.7 lb (310 gm)
Operating Temperature Range: 0° to +38° C (32° to 100° F)
Operating Humidity Range: 10% to 90% Relative Humidity Non-condensing
Latching Alarm: Reset by momentary power interruption.
Test Feature: Recessed test switch.
Maximum Air Velocity: 3000 Ft./Min. (15 Meters/Sec.).
Sensitivity: Nominal 3%/Ft.
Heat Sensor: 135°F Fixed Temperature Electronic Thermistor
ELECTRICAL RATINGS:
System Voltage nominal: 12 or 24 VDC
minimum: 8.5 VDC
maximum: 35 VDC
Maximum Ripple Voltage: 30% of nom. Voltage (peak to peak)
Standby Current: 120 µA max.
Alarm Current: 10mA minimum. 50mA maximum.
Reset Voltage: 0.8 VDC minimum
Reset Time: 6 Sec. maximum
Start-up Time: 34 Sec. maximum
(After 60 Sec. Reset)
EOL relay: A77-716B, 12/24 Volt
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