Connecting The PA1 to Relays for Door Phone Applications

The PA1 is equipped with two external I/O connections that can provide 3.3 volts of power to relays for controlling 12v - 125v loads, such as

• Strobe Lights
• Sirens
• Electric door opener
• Camera

The I/O connections provide four  3.3v pins (pin 1, 2, 3 and 4) that can be controlled via DTMF or HTTP GET commands to the PA1 mini-browser.

• Relay Board

• Page:
  Auto Disconnect Page to the PA1
• Page:
  Connecting The PA1 to Relays for Door Phone Applications
• Page:
  How do I connect my Amplifier with a Loop Start,TEL,Tip and Ring connection to the PA1
• Page:
  How to activate a PA1 PIN when the device receives a call
• Page:
  How To Configure Multicast Paging
• Page:
  How to connect to the PA1's Default IP Address 192.168.0.2
• Page:
  How to decrease/increase audio output volume of the PA1 and PA1+
• Page:
  How to play a tone before announcement on a PA1
• Page:
  How to start a call from the PA1 using the keyboard inout PINs
• Page:
  Lync, SfB Extension and PIN Authentication with the PA-1
• Page:
  PA-1 Door Phone Application
• Page:
  PA1 - Accessory Cable
• Page:
  PA1 - Keyboard pcb
• Page:
  PA1 - Relaysboard pcb
• Page:
  Public Anouncement System FAQ
• Page:
  Snom PA1 TFTP Recovery Procedure
• Page:
  Using Microsoft Task Scheduler to Run Script Daily to use PA1 as Bell or Ringer
• Page:
  What can you do with a PA1