Echelon is a two-conductor network that interconnects E2s and other associated devices. All Echelon devices are wired together using the daisy-chain method of network structuring.
For the E2 Enhanced (E2 versions 4.x and above) to communicate on the Echelon Network, the Echelon plug-in card (P/N 638-4860) must be connected. Echelon Network communication is not possible without the Echelon card. The plug-in Echelon card connects to the main processor board on the far right side of the processor board.
Part Number: 637-4860