UHPPOTE Normal Closed Wired Screw-Terminal Surface-Mount Magnetic Contact for Window Door Security (Pack of 5)
Current Price
$11.9
Average
$11.45
Min Price
$10.99
Max Price
$11.9
Price dynamics
4%
Price will be lower
in next 2 weeks
in next 2 weeks
According to the data, price will be lower in next two weeks, so not waste your money and track better price!
Product review & video
a basic guide to the door access control system starting off with the main board main board has power supply inputs here with positive and negative fittings for 12 volts we then have the door reader connections for reader one reader to reader three and reader for readers one and two are associated to door one radius three and four are associated to door to the connections that we have are for each reader we also conditional two connections here for a door release button the same is repeated on the other side of the board for that door number two each door is attached to a relay which has got common normally closed or normally open fittings this is tour one this is door two next to these is two connections for sensing this is to tell the board if the door is open or closed if a read sensors fitted or a door open sensor commonly on most Magnox this sensor is fitted but not usually wired u
