Mining explosion-proof and intrinsic safety type sound and light alarm

1、 Purpose:

This device is mainly used in places containing explosive gases underground in coal mines, for marking or sound and light alarms at transportation tunnels, inclined tunnels, wellheads, air doors, turnouts, and places where passengers are in place. In addition to the function of marking and lighting indication during marking, it also has a language prompt function to comply with the requirements of the Coal Mine Safety Regulations.

2、 Performance characteristics

The device has three states: standby state, dot state, and alarm state. The green light remains on during standby, and the red light (or Chinese characters) lights up and the speaker emits an alarm sound when flashing. When the alarm is triggered, the red light (or Chinese characters) flashes and the speaker emits language warnings such as "Driving, no pedestrians allowed". Its six alarm languages can be selected by the eight digit dial switch (or customized into different languages and Chinese characters according to user needs).

1: Driving, no pedestrians allowed

2: The signal has been sent, it is strictly prohibited to enter the tank

3: Pedestrians pass through, close the air door

4: Emergency stop, pay attention to safety

5: Motorcycles pass through bends, pedestrians please pay attention

6: Pedestrians pass through, close the air door

7: Car coming from ahead, pay attention to safety

3、 Technical parameters

Supply voltage: AC127V, working current: 0.2A.

Intrinsic safety parameters

Internal power open circuit voltage U0: DC12V; Internal power short-circuit current I0: 250mA; Remove current value from this photo: 1.1A. Operating voltage: DC11.9V; Working current ≤ 340mA. Parameters of 12V power supply for external power supply: U0: DC12V; I0: 1.1A； C0:0.2μF； L0:50μH。

The cable length connected to the matching equipment is 100 meters, with a distributed capacitance of ≤ 0.1 μ F/km, a distributed inductance of ≤ 1mH/km, and a distributed resistance of ≤ 7 Ω/km.

Sound level intensity: not less than 85dB

Visible distance of light signal: The light signal is visible at 20m in the dark.