RKL4786 by Bosch Rexroth Indramat

The RKL4786 cable is produced by Bosch Rexroth Indramat and belongs to the RKL Motor Power Cables series. It routes three-phase power and auxiliary signals between a servo controller and the matching motor, using factory-crimped connectors to simplify installation inside automated machinery. By combining high-current conductors and low-voltage control pairs in one assembly, the cable helps reduce routing complexity in machines with limited space around the drive system. This layout also supports stable signal transmission where fast axis movement and switching activity occur at the same time.

The copper power cores have a cross-section of 4×25.0 mm², allowing the drive to deliver rated current to large synchronous motors with low resistive loss. Four separate control cores of 4×1.5 mm² carry brake or temperature signals, and two shielded control pairs help preserve signal quality during high dV/dt switching. Conductor resistance is 0.78 ?/km at 20 °C, which helps keep voltage drop low across typical machine runs. The minimum fixed bend radius is 5×D, while moving cable applications use a flexible radius of 7.5×D to limit conductor strain during repeated motion. A keyed RLS0727 (K25) plug mates with the controller, and the motor end uses an RLK1301 (K25) receptacle so the assembly can be connected without field crimping.

Cyclic motion capability reaches 5,000,000 bending cycles, making the cable suitable for axes that operate continuously in drag chains or other moving guides. The overall diameter of 29.8 mm fits common cable carrier sections, while the halogen-free PUR jacket resists cutting fluids and weld spatter in industrial environments. For quick visual identification, the sheath is colored RAL 2003 (Orange). The jacket surface also supports smooth movement in guided cable paths, and the shielded control pairs help separate auxiliary signals from motor power conductors during operation.