1. Components: A plastic door magnetic contact typically consists of two main components: a reed switch and a magnet. 2. Installation: The reed switch is mounted on the door or window frame, while the magnet is placed on the door or window itself. 3. Magnetic Operation. 4. Open/Closed Status: The state of the reed switch contacts (open or closed) . 5. Wiring: The reed switch is connected to the security or access control system’s control panel using low-voltage wiring. 6. Material and Design: Has  plastic casing . 7. Compatibility. 8. Applications: Magnetic contacts are used in various applications. 9. Normally Closed (NC) or Normally Open (NO).