The sound and light fire alarm apparatus are one kind terminal when the fire happens, sound and light fire alarm apparatus are one kind terminal device for alarm.
Selects two or the four-wire system wiring method, the main line end receive two main lines, not polarization, power source termination to DC24V.
Sound and light alarm is that it is used for hazardous locations, a device to send an alarm signal through a variety of sound and light, will not ignite flammable gases.
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