Wiring for a Fail-Safe Configuration

Wiring

  1. GND connects to input 1 on the digital I/O pin connector of the Video Intercom.
  2. I/O connects to input 4 on the digital I/O pin connector of the Video Intercom.
  3. TAMPER connects to input 5 on the digital I/O pin connector of the Video Intercom.
  4. NC connects to the – terminal on the magnetic lock.
  5. COM connects to the – terminal on the safety relay, the REX sensor, and to the – terminal on the power supply.
  6. REX connects to the REX sensor.
  7. + connects to the + terminals on the power supply and the magnetic lock.

Parts

  1. Magnetic lock
  2. 60V freewheel diode (cathode is connected to the + wire, and anode is connected to the – wire)
  3. Power supply
  4. REX sensor
  5. Safety Relay
  6. Digital I/O pin connector of the Video Intercom