RKL4576 by Bosch Rexroth Indramat

The RKL4576 motor power cable is manufactured by Bosch Rexroth Indramat and belongs to the RKL Motor Power Cables series. This flexible assembly carries three-phase drive power along with low-level control signals between servo controllers and movable axes in industrial automation cells. Its design supports routing inside drag chains, allowing continuous movement without compromising electrical integrity in gantry robots, packaging lines, and assembly modules that rely on coordinated, repetitive motion. Along with supplying energy, the auxiliary cores relay enabling contacts and sensor feedback required for real-time position control during synchronized machine operation.

A circular jacket diameter of 25.5 mm provides space for the copper bundles while remaining small enough for confined cable tracks. Each of the three power cores is sized at 16.0 mm², supplying high motor current with limited voltage drop over the cable run. In addition, there are 4 control conductors, each with a cross-section of 1.5 mm², to carry brake release, temperature, or encoder reference lines. Overall loop resistance is limited to 1.21 ?/km at 20 °C, so dissipated heat stays within safe limits during continuous duty. The outer sheath resists abrasion inside plastic energy chains and helps protect the cable during repeated travel.

Electrical charging of the shield is minimized by a line-to-shield capacitance of 1.2 nF/m, assisting drive amplifiers in keeping current regulation stable during fast PWM switching. For static wiring, the bend radius may be as tight as 5 × D, while continuous motion in cable chains requires at least 7.5 × D; these limits help prevent conductor fatigue over long duty cycles. The cable surface is colored RAL 2003 orange for clear identification, and an adhesion-free, matte PUR jacket moves smoothly in cable chains without leaving residue during high-cycle operation.