51305072-600 is the paddle board in a dual-node chassis to connect the LCN interface with the LCN 'B' cable, Non-CE. The 'A' cable is attached to the CLCN-B paddle board in the same chassis.

TPN modules 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 TPN connects to both LCN Cable A and LCN Cable B through connectors called BNC tees on the front of 51305072-600 PWA. 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).

An LCN can have up to seven coaxial cable segments_a central segment and up to six remote segments or remote nodes. The remote segments are connected to the central segment with LCN Extenders (LCNE2s/XLCNE2s). LCN Extenders use fiber optic cables that provide ground isolation and can run through hazardous areas to interconnect LCN coaxial cable bus segments.

For the CE version of this interface, see 51305072-300.