Smoke alarm, smoke sensor, how to connect to the electrician?
The green COM is the relay public wire and must be connectedThe remaining yellow NC and white NO indicate that the outputs are normally open and normally closed
One of them needs to be set up according to the alarm host. If the alarm host is normally closed and the alarm is off, then your alarm will be connected normallyNever two two togetherThe 4 lines of the ceiling have to check the output of the alarm host. There is no uniform definition, and many engineers are free to take themLook at what is defined, and the two sides of the positive and negative power and signal line two, the signal line can be arbitrarily connected to the counter, no matter, the power is not wrong
The red line on the alarm and the black line as the power cord must be connected
