Description: old warehouse stock Introduction The Cerberus Pyrotronics Model DI-4A smoke detector with adjustable sensitivity operates on the ionization principle. It is designed to respond to the first traces of fire in the form of visible smoke or invisible products of combustion. Heat or flame is not required to activate the detector. The Model DI-4A detector has been developed for protection of a wide range of commercial, industrial, institutional, and residential occupancies. Technical Description The DI-4A detector is a plug-in, dual chamber ionization detector with adjustable sensitivity and contains two ionization chambers together with a highly sensitive semiconductor amplifier-switching circuit. One chamber detects the presence of combustion products. The second chamber serves as a reference, to stabilize the detector’s sensitivity for changes in environmental tem- perature, humidity, and pressure. The detector assembly locks in upon alarm; therefore it must be reset at the control panel. The DI-4A can be manually adjusted to two different sensitivity settings; Low and High. This is easily done by moving the sensitivity indicator, located on the underside of the detector housing, with a small pointed instrument such as a ball point pen. The detector operates from a 20 VDC source, provided by the Cerberus Pyrotronics control panel. The detector requires a very small standby current (less than 110μA), which permits the use of a 2-wire detector circuit of #18 AWG wire, reducing system installation costs. In alarm, the detector will draw approximately 175mA (with remote). The DI-4A detector is Underwriters Laboratories Inc. listed for ordinary indoor applications. Base assemblies for either flush or surface mounting, all with screw type terminals, are available for use with the DI- 4A detector as follows: DB-4TS Surface Base with Integral Alarm Lamp and Terminal Connection for Remote Relay or Remote Alarm Lamp DB-4TF Flush Base with Integral Alarm Lamp and Terminal Connection for Remote Alarm Lamp A remote indicator lamp, Model RL-30 or RL-40 may be connected when the detector is concealed from view or a remote relay, Model RR-2, may be connected to the DI-4A where a detector-controlled function is required at or near the detector. The Model RR-2 relay has one set of double- pole, double throw contacts rated at 120 VAC, 2 Amp. resistive.
Price: 250 USD
Location: Teaneck, New Jersey
End Time: 2024-11-30T23:41:17.000Z
Shipping Cost: N/A USD
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Item Specifics
All returns accepted: ReturnsNotAccepted
Brand: Siemens
Model: DI-4A
Type: Smoke Detectors
Country/Region of Manufacture: United States
MPN: Does Not Apply
