The Omron CS1WCN523CHN is a factory-assembled connecting cable designed to link an expansion I/O backplane to the CPU or another expansion rack within the CS1 series. Its listed length is 5 m, and it terminates with a D-Sub connector at both ends. It is specifically listed for CS1 Expansion I/O Backplanes, meaning the 5 m run covers medium rack separations—enough to route between cabinets or around obstructions without splicing.
Compared to the CS1WCN323CHN (3 m), the only difference is cable length. Both cables use the same D-Sub terminations and pinout, and are rated for the same backplane type. If your panel was dimensioned around the 3 m variant, the 5 m version drops in without any wiring change—you simply have extra length to coil or dress. The same applies to the 2 m (CS1WCN223CHN) and 10 m (CS1WCN133CHN) siblings. The electrical fit is identical across the family; choose the length that matches your physical separation.