RKL4489 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RKL4489 is a motor power cable from the RKL Motor Power Cables series. It features a PUR jacket, a bulk cable type of INK0606, and a cable composition of 4x16.0 mm² plus 2x(2x1.5 mm²). The cable has a dynamic bending radius of 7.5 times the diameter, a nominal outer diameter of 25.5 mm, and operates between -30 to +40 °C for fixed installations.
Internal Product Review
The RKL4489 power cable from the RKL Motor Power Cables series by Bosch Rexroth Indramat features a durable PUR jacket and optimized cable composition of 4x16.0 mm² plus 2x(2x1.5 mm²) for secure power delivery. Capacitance of 1.2 nF/m and conductor resistance of 1.21 Ω/km support efficient and reliable motor operation. This cable stands out for robust performance in demanding industrial environments.
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Product Description:
The RKL4489 motor power cable is produced by Bosch Rexroth Indramat and belongs to the RKL Motor Power Cables series. Designed for servo-drive installations, the cable links an IndraDrive controller to a permanent-magnet motor, supplying three-phase power and protective earth within one assembly. Its purpose in industrial automation is to provide a mechanically robust and electrically low-loss path so that motion axes receive stable current without introducing excessive capacitance or signal interference.
The copper conductors follow a 4x16.0 mm² + 2x(2x1.5 mm²) layout, giving separate motor temperature sensor and brake pairs alongside the power cores. A nominal outside diameter of 25.5 mm establishes the size envelope for cable chains and glands. Line-to-line capacitance measures 1.2 nF/m, a value kept low to limit reactive current at high PWM switching frequencies. DC loop resistance at 20 °C is 1.21 Ω/km, supporting low voltage drop across extended runs. During dynamic motion, the cable must flex around guides; the minimum permissible radius is 7.5xD, a figure achieved through finely stranded class-5 conductors and a PUR outer jacket that is adhesion-free and matte to minimise stick-slip in energy chains. The structure originates from bulk type INK0606, ensuring consistent electrical geometry across cut lengths.
For static routing, the bend limit widens to 5xD, which suits fixed cabinet-to-motor routes without undue mechanical stress. Continuous service is allowed from -30 to +40 °C when installed permanently and from -20 to +40 °C during moving operation, while storage between the same ‑30 °C and +40 °C window prevents thermal degradation of the PUR sheath. The controller end terminates with the RLS0723/K16 plug, and the motor side mates to interface RLK0004 using factory-crimped ferrules on phases U, V, W plus a ring-lug M8 for protective earth, simplifying field replacement. Together these features give a predictable impedance path, reduced maintenance cycles, and compatibility with Rexroth inverters that specify the INK0606 conductor system.
