To promote the use of clean energy, more and more vehicles change to use power supply system, instead of fuel.To prevent fire happen in the power supply system, it need smoke detector installed in the system space, it´s closed sapce with strong electromagnetic interference, so we R & D the new smoke detector which is sepcially designed for this application.
1. Overview
Vehicle smoke detector with relay output (hereinafter referred to as the detector) adapts special structure designed infrared photoelectric sensor, reliable performance MCU, and SMT chip processing production process, with the features of high sensibility, reliable and steady performance, low power consumption, decent and durable, easy to use, etc.
The product is not suitable for use in the following environment:
◆ With great smoke under normal circumstances.
◆ With great dust, mist, steam, oil mist pollution, corrosive gas.
◆ The relative humidity is greater than 97%
◆ The wind speed is more than 5m/s.
2. Work Principle
The detector adopts photoelectric sensor with special structure design and reliable performance of MCU, can effectively smoldering or the smoke. The light would be refracted, when the smoke enters the detector, then the light changing could be detected by light receiving element, because there is a linear relation between the light and smoke concentration. Detector would make Parameters Acquisition continuously, analysis and judgment, when confirming the light intensity data reaches a predetermined threshold, start relay output. When the smoke in the environment returns to normal state, the detector automatically returns to the normal working state.
Self test: under normal circumstances, press the test button, the detector would test the internal function test itself, relay output.
Note: when the detector alarm,it would be outputting relay passive contacts, contact capacity is 1A/24VDC, the default setting from factory is normally open.
3. Technical parameters
Power supply: DC9V ~ DC28V
Current: static current ≤200uA
Alarm current ≤ 45mA
Operating temperature: -40
degrees C ~ +90
Relative humidity: ≤
97%RH (40 - 2 Deg. C)
Output form: The default setting of the relay passive contact is normally, contact capacity is 1A/24VDC.
Smoke sensitivity：0.15～0.3dB/m
4.Appearance
5. Installation and commissioning
(1) Punch 4 holes with diameter of 6mm on the wall ;
(2) Put the expanding tube into the punched holes,screw tapping screws,reserve a 2-3mm space;
(3) First connecting the detector with power cable and signal cable, and the redundant signals cable can be cut off according to the actual requirements;
Connection mode
Red cable ---DC+
Black cable --- DC9-DC30V power supply;
White cable - normally open contact of relay output;
6. Instructions
Normal state: detector boot with 2HZ, let relay be closed / open 5 times, it would be working.
Self test: Detectors should be inspected regularly, operate it like this: when you press the button, relay output contacts closed; loose the button, the detector
automatically return to normal working condition.
7. Failure analysis and troubleshooting
No alarm output: check if the wire is bad contact
Frequent false alarm: Check if there was too much dusty on the detector, and clean the external of the detector (black plastic part.)
8. Maintenance
Any fault happened when use,please contact your supplier, and don´t disassemble and repair privately.If it isn’t being used for a long time, Please remove the
detector and pack it in the packing box, and store it in ventilated and dry place.
9. Transportation and storage
It should be transported and stored according to the provisions of GB/T15464-1995 "general technical conditions" for instrumentation package. We must keep the packaging and seal from original factory be complete and make sure the products won’t be attacked strongly. It should be avoided drastic temperature changes.
The stacked packing height should not exceed 6 layers, single piece stacking should not exceed 5 layers in unpacking.
