System Sensor 24TSRB, 2112 manual Specifications, Electrical Ratings, Before Installing

INSTALLATION AND MAINTENANCE INSTRUCTIONS

2112/24TSRB Photoelectronic Smoke Detector

A Division of Pittway

3825 Ohio Avenue, St. Charles, Illinois 60174

1-800-SENSOR2, FAX: 630-377-6495

Specifications
Diameter:	5.5 inches (140 mm)
Height (including mounting bracket):	1.7 inches (43 mm)
Weight:	5.3 oz. (150 g)
Operating Temperature Range:	32° to 100°F (0° to 39°C)
Operating Humidity Range:	10% to 93% relative rumidity, noncondensing
Latching Alarm:	Reset by momentary power interruption
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:	15 mA maximum
Alarm Current:
	at 12V: 38 mA maximum
	at 24V:	45 mA maximum
Reset Voltage:	0.8 VDC minimum
Reset Time:	0.3 seconds maximum
Start-up Time:	30 seconds maximum (after 30 second reset)
Supervision and Alarm Initiation Contact Ratings
Resistive or inductive load (60% power factor)
Form A:	0.5A @ 30 VAC/DC

Before Installing

Please thoroughly read System Sensor manual I56-407, Guide for Proper Use of System Smoke Detectors, which provides detailed information on detector spacing, place- ment, zoning, wiring, and special applications. Copies of this manual are available at no charge from System Sensor.

NOTICE: This manual should be left with the owner/user of this equipment.

IMPORTANT: This detector must be tested and maintained following NFPA 72 requirements. The detector should be cleaned at least once a year.

mounting bracket and plug-in screw terminal block that can be prewired to the system, allowing the detector to be easily installed or removed for cleaning. The detector’s sensitivity can be tested in place using the MOD400R Test Module (available separately from System Sensor).

The 2112/24TSRB features a supervisory relay that super- vises the power and the sensitivity of the detector. When the power to the detector is lost, the supervisory relay opens instantaneously. Where as, when the detector devi- ates from its sensitivity range indicating the need for main- tenance, the supervisory relay opens after a maintenance condition has continuously existed for 30 to 35 minutes.

General Description
The Model 2112/24TSRB is a 4-wire photoelectronic smoke	An LED on the detector provides a local visual indication
detector that uses a state-of-the-art optical sensing cham-	of the detector’s status. If power is applied to the detector,
ber. This detector is designed to provide open area pro-	and it is functioning normally in standby, the status LED
tection. It features a restorable, built-in, fixed-temperature	blinks every ten seconds. The LED latches on in alarm and
(135°F) thermal sensor.	quits flashing when the detector deviates from its sensitiv-
	ity range.
Installation of this detector is simplified by the use of the

D200-61-00 1 I56-930-02