Product Description:

The RKL0059 is a motor power cable produced by Bosch Rexroth Indramat in the RKL Motor Power Cables series. It links servo drives to their corresponding motors, carrying three-phase supply power, protective earth, and auxiliary signals for motion axes in automated machinery. The cable is intended for industrial systems that require reliable power transfer during continuous axis movement. Its flexible design supports repeated routing in applications where the cable moves with the machine.

The mechanical fatigue rating reaches 5,000,000 flex cycles, showing that the sheath and conductor bundle are made for repeated motion in cable tracks. During dynamic movement, the cable must bend around a minimum radius of 7.5 × D, which helps prevent copper strand fracture while machines accelerate. When laid permanently, the static installation bend limit is 5 × D, reflecting the lower stress of fixed routing. Copper efficiency is shown by a loop resistance of 13.3 Ω/km at 20 °C, which affects voltage drop across long runs. All insulated elements are built on the INK-series composite designated as INK0650, which balances flexibility with chemical resistance in industrial environments. The factory-assembled ends use connector code INS0481/C02 on the drive side and RLS0749/K02 on the motor side.

Power delivery is handled by 3 + PE conductors, with a dedicated protective-earth path that maintains safety bonding. The phase leads have a cross-section of 1.5 mm², which helps limit temperature rise under continuous load, and four auxiliary pairs use 1.0 mm² control cores for brake or supply functions. A discharge capacity of 0.8 nF/m describes the cable's distributed capacitance and should be considered when selecting output filtering on the drive. This capacitance level also helps characterize the electrical load presented by the cable during high-speed switching. The layout is suitable for gantries and pick-and-place axes where repeated flexing is part of normal operation.