Normally Closed Door Contact

And when you open the door the alarm system would be off if you have any questions please email me before buying.

Normally closed door contact.

In other words you wire this switch up to a door when the door is closed and the magnet is touching the alarm system would be on. The normally open means. With the magnet in close proximity the circuit through the contact is broken. If we program for normally closed but wire normally open the system will tell us the door is faulted when it s closed and that it s in the normal condition when it s open.

You can also get reed switches that work the opposite way. The circuit is connected when magnet part is. 2sets magnetic reed switch normally open closed nc no door alarm window security magnetic door switch magnetic contact switch reed switch for gps alarm or other device dc 5v 12v 24v light 4 3 out of 5 stars 155. 1 pair magnetic switch includes two parts the one part is magnet and the other part is switch with wires package included.

The normally closed means. A basic 5 screw surface contact. Two nickel screws to govern the reed switch and 3 spare brass screws for any custom requirements. Reed switches like this are called normally closed nc normally switched on so electricity flows through them most of the time.

Comes complete with fitting screws. The two contacts are normally snapped together and when you bring a magnet up to the switch spring apart. The circuit is connected when magnet part is near to the switch part type. 1 pair door contact magnetic switches please choose the type and the quantity you need type.

This contact is normally open n o the circuit through the contact is complete until the magnet is moved close by.