Communication Module Brand :- Honeywell Part No. :- 51304543-001 Assy No :- 51304544-100 Product Type :- KLCN I/O CB Card This is the paddle board in an non-CE dual-node chassis to connect the LCN interface with the LCN "B" cable. The "A" cable is attached to the KLCN-CA paddle board in the same chassis. This part has been replaced by the CLCN-B, a CE-compliant version of the I/O paddle board.