The Mitsubishi MR-JCCBL20M-L is a 20-meter encoder feedback cable designed for MR-J4 servo drive systems, carrying position and velocity signals between the servo motor encoder and the drive for precision motion control.
No official successor part is identified in the record; for ongoing MR-J4 installations the MR-JCCBL20M-L remains the right-sized spec rather than a substitute hunt.