JDHW (reflection type) explosion-proof infrared beam smoke detector

 1. Overview of JDHW (reflective) explosion-proof infrared beam smoke detector

JDHW (reflective) explosion-proof infrared beam smoke detector (hereinafter referred to as the detector) is a non-coded reflective linear infrared beam smoke detector. The detector must be used with reflectors, but it is necessary to use one or four reflectors according to the installation distance between the two.

The detector has a built-in single-chip microcomputer with excellent performance, which has powerful analysis and judgment capabilities. Through the calculation program solidified inside the detector, it can automatically complete system debugging, compensation for changes in external environmental parameters, fire alarm judgment and fault judgment. Indicator lights and signal output terminals give status indications. The detector adopts a new and reasonable structural design, sensitive adjustment, accurate positioning, beautiful appearance, easy installation, simple and convenient debugging method.

This product complies with the standards of GB3836.1-2000 "Electrical Equipment for Explosive Gas Atmosphere Part I General Requirements" and GB3836.1-2000 "Electrical Equipment for Explosive Gas Atmosphere Part II Flameproof Type "d"". It is suitable for fire monitoring in flammable and explosive places where smoke occurs in the primary stage of fire, with large areas, high racks, and long distances. It has passed the inspection by the inspection agency designated by the state and obtained a national explosion-proof certificate.
2. Features of JDHW (reflective) explosion-proof infrared beam detector

  1. Wide working voltage range and large protection area;

  2. The detector combines the transmitting part and the receiving part into one, and the installation is simple;

3. Built-in microprocessor, intelligent fire alarm and fault judgment;

4. With automatic calibration function. Debugging can be completed by a single person in a short time;

5. With self-diagnosis function, it can monitor the internal failure of the detector;

6. With automatic compensation function, it can automatically compensate for factors that reduce the received signal such as dust pollution, position offset and aging of the transmitting tube to a certain extent;

7. With fire alarm and fault passive output contacts;

  8. Two levels of sensitivity can be set on site;

  9. The detection optical path is ingeniously designed and has strong anti-interference performance;

10. Using SMT process;

11. The appearance is beautiful and generous.
3. Structural features of JDHW (reflective type):
Explosion-proof mark ExdⅡBT6
Temperature range -20℃～50℃
Humidity range less than 95%RH
Atmospheric pressure 80～110Kpa
Power supply voltage DCl5V--DC28V
supply current

Debug current≤20mA

Monitoring current≤12mA

Alarm current ~22mA
Fire alarm, fault contact output

Fire alarm relay: contact capacity 28V/2A, normally open in normal state, closed in fire alarm state

Fault relay: contact capacity 28V/2A, normally open in normal state, closed in fault state
Adjustment angle -6 degrees--+6 degrees
Optical path orientation dependence angle ±0.5 degrees
Sensitivity level

Level 1 sensitivity: the highest sensitivity

Secondary sensitivity: the lowest sensitivity
Detector status indication

Debug Status: The green and yellow LEDs are lit or flashed in a specific pattern, as described in the Debug section. Normal monitoring status: The red indicator light flashes periodically.

Fire alarm status: The red indicator light is always on, and the yellow indicator light is off. Need to power on again to clear the fire alarm.

Fault status: The yellow indicator light is always on. If the fault is restored, the fault signal of the detector is automatically eliminated by the detector.
The light path is completely blocked

The detector first reports a fault and lights up the yellow indicator light, and then reports a fire alarm after 20 seconds, lights up the red indicator light, and turns off the yellow indicator light.

Note: This situation does not mean that a fire has occurred. When the cover is restored, the fault signal is automatically cleared by the detector, and the fire alarm signal needs to be cleared by powering on again.
use environment

Temperature: -10℃--+50℃

Relative humidity ≤95%, non-condensing
Protection area The maximum protection area of the detector is 14x100=1400m2, and the maximum width is 14m
Optical path length 8m--100m
Dimensions 260×160×130mm
Installation size 185×140mm
Shell material aluminum alloy
color: red
Weight 3.7Kg