Omnicomm ICON display has built-in panic button.

With power ON, if the panic button is pressed the Omnicomm ICON display sends the triggering event via the RS-485 interface.

When connected to a panic button output or a terminal universal input, the Omnicomm ICON display sends the triggering event to the terminal regardless of power ON or OFF.

Connect to a panic button output or an Omnicomm terminal universal input according to the diagram: