RKL0059 by Bosch Rexroth Indramat

The RKL0059 cable is a motor power lead produced by Bosch Rexroth Indramat in the RKL Motor Power Cables series. It interconnects a drive controller and a servo motor in automated lines. Both traction power and low-level control signals reach the axis through a single assembly that is compatible with continuous-flex energy-chain routing.

The cable tolerates a dynamic bending radius of 7.5 × D. This value is the minimum bend radius that can be applied during constant motion without overstressing the conductors or shield. Its rated life of 5,000,000 bending cycles confirms suitability for high-duty drag chains used in pick-and-place or palletizing tasks. Each power core has a cross-section of 1.5 mm², giving the copper enough current-carrying capacity for small and mid-frame motors while keeping the bundle flexible. A line-to-shield discharge capacity of 0.8 nF/m is the inherent capacitance that the drive must charge on every PWM edge, and lower capacitance helps reduce reactive current and inverter heat. Conductor resistance measured at 20 °C is 13.3 ?/km, which is used to calculate voltage drop when the motor is mounted far from the cabinet. For fixed installation points, the static bending radius is limited to 5 × D.

The bulk cable type INK0650 identifies the insulating compound, shielding braid, and outer jacket material qualified for chemical and oil exposure. Inside the jacket are 4 auxiliary conductors that typically feed holding-brake coils or PT100 sensors, along with the power bundle formed by 3 + PE cores for three-phase supply and protective earth. Drive-side termination is provided by a keyed circular connector coded INS0481/C02, and the motor end mates with RLS0749/K02 to complete the locking pair. Control pairs use a 1.0 mm² cross-section, which balances signal integrity with flexibility during cable motion.