E747 Encoder

Ideal for small warning systems and easy to use, the E747 encoder aids dispatchers in quickly activating mass notification products when disaster strikes. The E747 is provided in a compact and attractive desktop design for applications where space is at a premium.

  • Simple 3 step operation
  • Whelen 10 digit DTMF activation protocol is fast, secure and reliable
  • Selection of 18 activation commands
  • Selection of 1-10 units individually
  • System “All Call”
  • Inclined keyboard for easy access and viewing
  • Membrane keypad features raised keys with tactile response
  • LED indicators illuminate upon key selection
  • Command key LED flashes when activation has been sent
  • Keyboard On/Off switch and LED indicator
  • Microphone input and microphone level adjustment
  • May be used for mobile applications

WARNING: These products may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit whelen.com/regulatory.


  • 18 function encoder permitting individual selection of 1-10 units or system “All Call”.
  • Compact desktop design with inclined sealed membrane keyboard.
  • LED key select indicators illuminate upon key selection.
  • Command key LED flashes upon transmission of activation sequence.
  • 12VDC nominal operation, furnished with UL listed wall mount transformer.
  • May be used for mobile applications.

For more detailed specifications, including dimensions, and electrical & environmental specs, download the Product Sheet.

Model Description Downloads
E747 Activation control for small warning systems Product Sheet | Install Guide