Mitsubishi Electric PLC Accessories, Expansion Cable, MELSEC-F Series, Application: Extension cable for expansion unit, Cable Length(m): 0.3, Other specifications: Only 1 is usable per 1 system. Can connect to input/output units (expansion cable type) and/or intelligent function units by combining with a connector conversion adapter (FX5-CNV-BC). (All expansion equipment includes a standard connection cable or has one built-in)