RKH0903 by Bosch Rexroth Indramat

The RKH0903 hybrid cable is produced by Bosch Rexroth Indramat as part of the RKH Hybrid Cables series. This product combines power and signal cores in one sheath for motion devices that require compact wiring. It uses a basic design within the series, supplying a standard mechanical layout suited to drag-chain routing and repeated axis travel. In industrial automation cabinets and moving axes, the cable serves as the link between drive components and field hardware while accommodating repeated flexing. By carrying multiple circuit functions in one outer jacket, it helps reduce cable bundle size and simplifies routing through confined machine spaces.

At a factory-supplied length of 5.0 m, the cable reaches typical motor zones without intermediate splices that could raise resistance. The fixed length is useful where the connection path must reach a motor or feedback point without adding extra joints. Its jacket survives up to 5,000,000 cycles of continuous bending, so it supports high-duty energy chains. During motion, the minimum dynamic bend radius is 10 x D, which helps preserve conductor geometry and insulation when the cable cycles through an energy chain. For fixed installation, the minimum bend radius is 5 x D, reflecting lower mechanical stress when the cable remains stationary.

The cable variant is Hybrid, so a shared outer jacket carries both power pairs and control cores to reduce harness count. One end terminates in connector type RHS0005 and the opposite end in RHS2321, allowing direct attachment to compatible Rexroth servo drives and motors without adapter pins. The operating temperature can reach 80 °C, while the cable remains flexible down to -40 °C. The same temperature limits apply during storage, which suits unconditioned warehouses as well as equipment that may sit idle before installation. These conditions support use in industrial areas where the cable may be routed, stored, and operated under varying thermal conditions.