RKL4780 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RKL4780 is part of the RKL Motor Power Cables series and features a cable jacket made of PUR with an outer diameter of 30.8 mm. This cable is engineered for 5,000,000 bending cycles, has a conductor count of 8, and a power conductor cross-section of 35.0 mm².
Internal Product Review
The RKL4780 from Bosch Rexroth Indramat is a robust RKL Motor Power Cable designed for demanding motion applications. Featuring a highly durable PUR cable jacket and rated for up to 5,000,000 bending cycles, it delivers excellent flexibility and longevity. The 8-conductor configuration and substantial 35.0 mm² power conductor cross-section make this cable well-suited for high-capacity industrial motors.
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Product Description:
The RKL4780 is a flexible motor power cable produced by Bosch Rexroth Indramat for the RKL Motor Power Cables series. It links an Indramat drive controller to a servomotor and carries both power and auxiliary control signals, enabling coordinated motion in automated machinery that demands continuous movement and frequent axis reversals.
The cable delivers motor current through conductors with a cross-section of 35.0 mm², while separate control cores rated at 1.5 mm² handle brake or sensor lines. Inside the jacket there are 8 individual copper conductors arranged to limit mutual interference and simplify termination. A moulded polyurethane sheath made of PUR protects the bundle from cutting fluids and oil exposure, and keeps the overall diameter to 30.8 mm. Installation in static trays requires a minimum bend of 5×D, and dynamic routing on cable chains may follow a tighter 7.5×D radius without exceeding permissible strain. The controller interface uses a prefabricated RLS0727/K35 plug, whereas the motor end is fitted with an RLK1501 connector that locks to Indramat drive motors.
The mechanical life is verified for 5,000,000 flex cycles under constant motion, supporting high-duty gantries and pick-and-place axes. Line-to-line capacitance is held to 1.2 nF/m so the connected drive can maintain stable pulse-width modulation at long cable lengths. Conductor resistance is only 0.554 ohm/km, minimizing voltage drop at full load. The design follows the INK0667 bulk cable specification, ensuring identical electrical parameters across different lengths. The factory-mounted RLS0727/K35 and RLK1501 terminations reduce wiring errors, maintain shielding continuity, and shorten commissioning time for field technicians.
