RKL4750 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RKL4750 is a power cable from the RKL Motor Power Cables series. It features four power conductors with a size of 35.0 mm² and four control conductors at 1.5 mm², and supports up to 5,000,000 bending cycles. The cable has an overall diameter of 30.8 mm and includes RLS0723 (K35) and RLK1401 connectors for controller and motor sides.
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Product Description:
The RKL4750 motor power cable is produced by Bosch Rexroth Indramat as part of the RKL Motor Power Cables series. Designed for servo-axis installations that move continuously in cable chains or robotic joints, the assembly links drive controllers to motors while carrying both power and feedback conductors in a single sheath. Its pre-terminated connectors shorten installation time and maintain signal integrity in industrial automation cells that demand high cycle counts and compact routing spaces.
A key mechanical rating of the cable is its endurance of 5,000,000 flexing cycles, making it suitable for long-life dynamic applications. During motion the conductors may bend to a minimum radius of 7.5 × D, whereas at rest the static routing can tighten to 5 × D; these limits reduce copper fatigue and insulation stress. An overall diameter of 30.8 mm determines carrier tray width and clamp sizing. Four power cores with a cross-section of 35.0 mm² deliver the motor phase current, while four control cores sized at 1.5 mm² accommodate temperature or brake signals. Together, these dimensions balance ampacity, voltage drop, and mechanical flexibility for medium-frame servo motors.
The electrical characteristics complete the performance profile. A line-to-line capacitance of 1.2 nF/m influences drive-side filter tuning, and a conductor loop resistance of 0.554 Ω/km limits power loss over extended travel ranges. The power cores are rated for 300/500 V, aligning with typical Rexroth inverter output stages, while the control pair insulation supports 300 V. Four power and four signal conductors terminate in an RLK1401 motor plug and an RLS0723 (K35) controller plug to ensure keyed, vibration-resistant connections without additional field crimping.
Frequently Asked Questions about RKL4750:
Q: How many bending cycles is the RKL4750 power cable rated for?
A: The RKL4750 can withstand up to 5,000,000 bending cycles, making it suitable for applications involving continuous movement.
Q: What is the dynamic bending radius required for proper installation of the RKL4750?
A: The dynamic bending radius of the RKL4750 is specified as 7.5 times the cable diameter.
Q: What is the size of the control conductors in the RKL4750 cable?
A: The control conductors in the RKL4750 each have a cross-sectional area of 1.5 mm².
Q: What connectors are equipped on each end of the RKL4750 cable?
A: The RKL4750 features the RLS0723 (K35) connector on the controller side and the RLK1401 connector on the motor side.
Q: What is the operating voltage of the power wires in the RKL4750 cable?
A: The power wire operating voltage for the RKL4750 is rated at 300/500 V.
