RKL4550 by Bosch Rexroth Indramat

Bosch Rexroth Indramat supplies the RKL4550 motor power cable as part of the RKL Motor Power Cables series. The product is intended to transfer motor power from a drive controller to a moving motor in automated machinery, so the cable must tolerate constant motion while maintaining low resistance and reliable shielding. It is intended for applications where repeated travel and stable electrical performance are both required during operation. Within a cable set, this model occupies the power-supply branch, allowing direct connection between the drive side and the motor side without custom field assembly.

The cable is rated for 5 million flexing cycles, a value that indicates the number of continuous movements it can withstand before conductor fatigue is expected. It is delivered as a ready-made assembly, meaning the length, terminations, and insulation are completed at the factory rather than on site. Because it belongs to the power cable variant of the RKL family, its conductor cross-section and dielectric spacing are sized for motor current rather than feedback or brake signals. During dynamic motion, the minimum bend radius is 7.5×D, while stationary runs may follow the tighter 5×D limit for compact routing.

The drive end is supplied with ferrules and a ring terminal, and the motor end uses a keyed plug connector RLS0722, which avoids field crimping and helps maintain the correct mating orientation. The basic cable model uses PVC jacket materials that remain flexible down to -30 °C, allowing cold-start operation in unheated facilities. Thermal endurance reaches 80 °C during service, and the same upper limit applies when the cable is stored. These fixed terminations keep the assembly ready for installation without additional end preparation, and the PVC jacket supports repeated routing through moving equipment.