Flameproof compound smoke and heat fire detector for battery compartment / gas cabinet / analysis shelter flameproof smoke and heat detector / RS485

Battery compartment explosion-proof compound smoke and heat fire detector /Special Gas Cabinet/Analysis Shelter Explosion-proof Smoke and Heat Detector/RS485/Switching Value/ Modbus-RTU Protocol

I. Overview:

The HASD-YW-2 intrinsically safe explosion-proof compound smoke and heat fire detector is a detector with RS485 signal output, which can be matched with any upper computer (controller) with RS485 communication interface.

When the on-site smoke concentration exceeds the set threshold or the on-site temperature reaches the set value, the indicator light of the detector remains on and sends an alarm signal to the controller. Only after the system is reset or temporarily powered off and then powered on again, the indicator light will return to the flashing (patrol inspection) state.

This product meets the requirements of GB3836.1—2000 "Electrical Equipment for Explosive Gas Environments - Part 1: General Requirements", GB3836.2--2000 "Electrical Equipment for Explosive Gas Environments - Part 2: Flameproof Type "d"" and GB3836.4--2000 "Electrical Equipment for Explosive Gas Environments - Part 4: Intrinsically Safe Type "i"". It is suitable for places containing flammable and explosive mixed gases in industries such as petroleum, chemical industry, military industry, metallurgy, and pharmaceuticals. It has been inspected and qualified by the inspection unit and obtained the explosion-proof certificate.

II. Features:

The smoke sensing part of this detector adopts a new scattering technology and imported optoelectronic devices, which improves the reliability, stability and consistency of the sensor. It also adopts a unique maze design, with good performance in preventing insects, dust and external light interference. The heat sensing part of this detector uses the sensitivity of thermistors to temperature to detect ambient temperature, and is especially suitable for places with violent temperature rise during fires. It has a novel structure, beautiful appearance, stable and reliable performance, and strong moisture resistance.

III. Technical Characteristics:

1. Explosion-proof type: Intrinsically safe-flameproof compound

2. Explosion-proof mark: Exd (ib) IICT6

3. Ambient temperature: -10℃~+55℃

4. Relative humidity: ≤95% (non-condensing)

5. Atmospheric pressure: 80~110KPa

6. Working voltage: DC24 V±4V

7. Static current: ≤120uA

8. Alarm current: 10mA≤I≤30mA

9. Response threshold: 0.10dB/m~0.27dB/m

10. Alarm temperature: 60℃

11. Alarm reset: Instant power failure (10s Min, DC2.5V Max)

IV. Installation Precautions:

1. During maintenance, be careful to avoid damaging the detector.

2. There should be no obstructions within 0.5m around the detector.

3. The horizontal distance from the detector to the edge of the air conditioning supply air outlet shall not be less than 1.5m.

4. The horizontal distance from the detector to the wall or beam edge shall not be less than 0.5m.

5. When installing detectors on the ceiling of inner corridors with a width of less than 3m, they should be arranged in the middle. The installation spacing of the detectors shall not exceed 15m, and the distance from the detector to the end wall shall not be greater than half of the installation spacing of the detectors.

6. The detector should be installed horizontally. If it must be installed obliquely, the inclination angle shall not be greater than 45°.

7. The detector base shall be installed firmly, and its wire connection must be reliable.

8. The confirmation light of the detector shall face the main entrance direction that is convenient for personnel to observe.

9. It is strictly forbidden to disassemble under power in flammable and explosive places.

10. Do not damage the flameproof surface during installation, and keep it clean. The fastening screws of the flameproof surface shall be tightened evenly, and care shall be taken to ensure that no wires or other foreign objects are caught in the flameproof surface.

11. Note: During installation, do not remove the dust cover to prevent dust from entering and affecting the accuracy of the detector. The dust cover shall be removed when the system is in normal operation.

V. Working Principle:

The smoke sensing part of this detector uses the infrared scattering principle to detect fires. The circuit is mainly composed of an infrared transmitting part and a receiving part. The transmitting tube and the receiving tube are placed in an optical dark room, which can block external stray light interference but does not affect the entry of smoke. In a smoke-free state, only very weak infrared light is received. When smoke enters, the received light signal is enhanced due to scattering. When the smoke reaches a certain concentration, an alarm signal can be output. To reduce interference and power consumption, the transmitting circuit works in an intermittent mode, which can extend the service life of the transmitting tube.

The heat sensing part of this detector uses a thermistor as a sensor. The signal output by the sensor is transformed by an amplifying circuit and then input to a single-chip microcomputer, which uses an intelligent algorithm to process the signal. When the single-chip microcomputer detects a fire alarm signal, it lights up the fire alarm indicator light and outputs the fire alarm signal. The alarm output signal adopts the RS485 output mode.

RS-485 Communication: It adopts a standard RS-485 communication interface, and the communication baud rate can be selected as: 2400bps, 4800bps, 9600bps, 19200bps (the factory default baud rate is 9600bps, and the 485 address is 5). Modbus-RTU Protocol: The alarm status register addresses are 01, 02, 03 or 04, which are read using function codes 01, 02, 03 or 04. The status is "0" (normal) or "1" (alarm).

All product certifications are complete, welcome to inquire. www.szhsj119.com

Shenzhen Hongsheng High-Tech Electronics Co., Ltd.

Contact: Mr. Chen Cheng

Tel: [15889370119] (WeChat same number)