R D Enterprises

The D296 Long-range beam smoke detector (24V) is used in clear open structures such as arenas, atriums, auditoriums, ballrooms, churches, factories, museums, and warehouses. Each detector consists of a transmitter, a receiver, and a remote indicator plate. Because the transmitter and receiver typically mount on the ceiling or high on walls or columns, they provide an effective and unobtrusive means of supervising public areas for fire protection. The D344-RL Remote indicator plate, included with the detector, provides a convenient means of verifying detector status. Install it anywhere within 500 ft (152 m) of the beam receiver (when using 18 AWG [ISO 0.75 mm2 ] wire). The indicator plate has three LEDs to indicate normal, trouble, and alarm conditions, and test points to monitor the detector circuit.

Functions:
Aim Mode: When the cover is removed from the receiver, the receiver goes into aim mode. When the cover is removed from the transmitter, the transmitter stops transmitting. Pressing the Aim Mode button on the transmitter allows transmission while the cover is off. For fine tuning which requires a measurable voltage at the receiver, the covers must be off and transmission is necessary.

Alarm Operation: The transmitter emits a pulsed infrared beam. Thereceiver measures the intensity of the beam over aperiod of time and compares this data with an alarmthreshold. Select one of six levels of sensitivity for thealarm threshold through a switch on the receiver.If the receiver senses signal strength below the presetalarm threshold in excess of the alarm period it signalsan alarm.

Signal Loss Compensation: The receiver automatically compensates for thegradual loss of signal due to dust and dirt build-up onthe cover. The receiver measures the intensity of thepulsed infrared beam emitted by the transmitter over aperiod of time and compares this data with a presettrouble threshold. When 50% of the signal is lost orthe signal gains 20%, the receiver sends a troublesignal to the control panel.

DC- 9105 E model 
The GST I-9105R is a reflective infrared beam smoke detector that can operate in either conventional or addressable modes.

It is microprocessor-based and offers algorithms for analysis and decision making.  The detector has two selectable sensitivity adjustment levels and is compatible with conventional panels. It is ideal for warehouses, atriums, airport terminals, and shopping centers.