Product Description:

The RKL4477 is a flexible motor-to-drive cable manufactured by Bosch Rexroth Indramat for applications covered by the RKL Motor Power Cables series. It combines power and auxiliary pairs inside a torsion-resistant construction so that automated handling systems, gantry stages, and multi-axis robots can route one assembly instead of separate conductors. The cable supplies phase energy, brake supply, and feedback signals over repeated bending cycles, which reduces installation time and keeps cabinet wiring orderly in industrial automation lines.

An outer diameter of 36.8 mm defines the minimum carrier radius and simplifies selection of energy-chain brackets. The power cores are rated for 600 V AC, allowing direct connection to IndraDrive mains outputs, while the auxiliary cores carry control potentials up to 300 V AC for brake release or sensor inputs. Copper conductors exhibit a resistance of 0.386 Ω/km; this low value limits I²R losses and assists drives in meeting dynamic torque commands without excess heat. A PUR (adhesion-free, matte) outer jacket offers oil, weld-slag, and microbe resistance, ensuring the sheath remains intact through continuous flex cycles in harsh production areas.

The signal section contains 4x2.5 mm² control conductors, so contactors and holding brakes can be energized without running separate looms. Mechanical data show the cable tolerates accelerations up to 10 m/s² and travel velocities of 5 m/s, making it suitable for high-speed pick-and-place axes or linear motors with rapid strokes. A distributed capacitance of 1.3 nF/m keeps drive switching currents well-defined by limiting reactive charging, which supports stable commutation and reduces EMC emissions when the assembly is installed in long-travel energy chains.