UHPPOTE Wired Shutter Roller Magnetic Overhead Door Contact Output NC/NO with Bracket
- This Contact Works with Any Access Control or Burglar Alarm System Available.
- Great for use in family and factory window, door. etc..
- NO means Normally Open: when the magnet separate, the circuit is conductive( light on ).
- When the magnet together, the circuit is not conductive (light off).
- NC means Normally Closed: When the magnet together, the circuit is conductive (light on).
- When the magnet separate, the circuit is not conductive (light off).