The LCNE2 paddle board is part of the LCN Extension set used to extend the LCN to a remote location using fiber optic cable. The normal arrangement of LCNE2 boards consists of four boards, one each for the A and B cables, at both ends of the extension. The LCNE2 card uses SMA Type fiber optic connectors.

The LCNE2 is no longer manufactured by Honeywell, replaced by the XLCNE2. WPC normally has the LCNE2 in stock.