RH2-031DBB by Bosch Rexroth Indramat

The RH2-031DBB cable assembly is produced by Bosch Rexroth Indramat and is part of the RH2 Encoder Cables series. It serves as a combined encoder-feedback and power link between MS2x synchronous motors and IndraDrive servo amplifiers, removing the need for separate signal and power cords in compact automation cabinets. Classified in the Rexroth Cables product group, the assembly uses a basic cable design with a standardized sheath, conductor layout, and shielding scheme suited for repetitive-motion machinery where clean feedback transmission is important.

The cable is rated for a service life of 5,000,000 bending cycles, meaning the jacket and conductors can flex that many times without electrical interruption. During dynamic movement, it must be routed with a minimum bend radius of 7.5 × D, while stationary loops may be tightened to 5 × D without overstressing the copper strands and insulation. The conductor cross section is 1.5 mm², which supports typical motor holding currents and encoder supply voltages with acceptable voltage drop. At the motor end, an M23 Hybrid Connector mates directly with the housing feed-through, combining signal pins and power contacts in a single twist-lock connection, while the opposite end is terminated for direct connection to the drive.

The cable is classified as a Hybrid Cable, so it bundles twisted pairs for incremental or absolute encoder channels together with three-phase power cores under one shield. Its electrical characteristics are matched to IndraDrive controller requirements, and the pin layout corresponds to MS2x With Plug S motor feedback sockets for direct connection without adapters. As a 2nd Generation member of the RH2 family, the assembly uses upgraded sheath polymers that tolerate lubricants and welding spatter. The motor-to-drive connection remains direct, which helps keep insertion loss low and supports clean signal transmission.