Product Description:

The RKL4768 is a motor power cable manufactured by Bosch Rexroth Indramat within the RKL Motor Power Cables series. It links a drive module to a synchronous or asynchronous motor through the designated RLK1401 motor terminal and RLS1302 (C16) drive connector, carrying three-phase power along with auxiliary control cores. In automated machinery, the cable forms the dynamic electrical path that allows the servo amplifier to supply current to the axis while the cable withstands continuous movement in cable tracks, especially within automated assembly and packaging systems. Its combined power and control conductors reduce the need to route separate cables between the drive and motor. The cable jacket also protects the internal conductors from the repeated mechanical forces associated with moving carriers.

Mechanical durability is supported by a rating of 5,000,000 bending cycles, indicating how many articulated movements the jacket can endure before fatigue becomes critical. Under static mounting, the cable must observe a minimum 5 × D bending radius, which helps keep the conductors from being stressed when they are clamped in fixed raceways. The cable has an outer diameter of 25.5 mm, so chain trays, cable glands, and routing channels must be sized accordingly. Power conductors have a cross-sectional area of 16.0 mm², which limits voltage drop when carrying high motor currents. Copper resistance is held to 1.21 Ω/km to preserve electrical efficiency across extended cable runs. These electrical properties support the transfer of motor power while limiting resistive losses and excessive conductor heating during operation.

For moving applications, the minimum curvature increases to a 7.5 × D bending radius, reducing mechanical stress during continuous flexing. Signal integrity is supported by control wires with a cross-sectional area of 1.5 mm², allowing them to supply brake-release circuits or sensor logic without requiring a separate harness. The cable insulation has a parasitic capacitance of 1.2 nF/m, which the drive must account for when applying pulse-width modulation filtering. Fixed routing is permitted down to a minimum operating temperature of -30 °C, while the maximum service temperature is 40 °C. The matte PUR jacket is adhesion-free, helping adjacent cables move without sticking inside densely packed cable chains. Its jacket material also provides a durable outer surface for routes that experience frequent movement and contact with carrier components.