51107403-100 is the LCN I/O board for LCN nodes, used in a 5-slot or 10-slot non-CE chassis. The I/O board facilitate interconnection of the module to the Local Control Network (LCN). Each LCN module requires a unique LCN device address, this is the board where the LCN node address is set. If the 51107403-100 LCN I/O board is used in an SBHM Node, it must be revision T or higher.

LCN nodes communicate with each other through interconnections of coaxial cable and fiber optic cable. There are two LCN cables for redundancy, Cable A and Cable B. Each cable must be routed separately and must be marked to indicate that it is Cable A or Cable B.

Cable A is marked with yellow and Cable B with green shrink-fit bands at the connectors. Each node on the LCN connects to both LCN Cable A and LCN Cable B through connectors called BNC tees. These connectors allow a node to be disconnected from the coaxial cable segment without disrupting communication among the other nodes. The tee connectors are part number 51190728-105 (this is not the same part number used for Data Hiway tee connectors).

The latest LCN I/o version is 51305072-400.
For CE applications, use the LCN I/O 51305072-100 .