RKL4621 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RKL4621 is part of the RKL Motor Power Cables series and features four power conductors at 35.0 mm² each, rated for 600 VAC, along with four 1.5 mm² control conductors. This cable uses a PUR jacket in orange (RAL 2003) and supports a dynamic bending radius of 7.5 times the diameter, handling up to 5,000,000 bending cycles.
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Product Description:
The RKL4621 cable is a flexible motor power cable produced by Bosch Rexroth Indramat within the RKL Motor Power Cables series. It is intended to route three-phase power and auxiliary control signals between Indramat drive controllers and servo motors in automated machinery. By combining power and four screened control cores in a single jacket, the cable simplifies cabinet wiring, supports coordinated motion in robotic or CNC axes, and withstands repetitive dynamic movement while maintaining stable electrical characteristics required in industrial automation.
Mechanical construction focuses on size, material, and conductor layout. The nominal outer diameter is 30.8 mm, allowing routing through standard drag-chain brackets. A rugged PUR outer jacket resists oil and coolant splash, and its visibility is enhanced by the RAL 2003 (orange) colour code used on machinery safety circuits. Inside, four power cores each have a cross-section of 35.0 mm², while the separate signal bundle carries four control cores of 1.5 mm². At 20 °C the copper loop resistance is 0.554 Ω/km, and mutual capacitance is 1.2 nF/m, values selected to keep voltage drop and reactive load within drive limits over long cable runs.
Dynamic service parameters define installation limits. Continuous motion in energy-chain loops is allowed down to a bend of 7.5 × D, whereas fixed routing can use the tighter 5 × D radius. Tested for 5,000,000 bending cycles, the cable maintains insulation integrity during long duty cycles in gantry axes. Power cores are rated for 600 VAC, matching Indramat inverter outputs. A factory-installed INS0381/C35 motor plug mates to MSK and similar stator connectors, while the controller end terminates in an RLS0724/K35 plug to ensure shield continuity and strain relief without field crimping.
Frequently Asked Questions about RKL4621:
Q: How many bending cycles is the RKL4621 cable rated for in dynamic use?
A: The RKL4621 motor power cable can withstand up to 5,000,000 bending cycles in dynamic applications.
Q: What is the size and count of power conductors in the RKL4621 cable?
A: The RKL4621 features four power conductors, each with a cross-sectional area of 35.0 mm².
Q: What is the voltage rating for the power wiring in the RKL4621 cable?
A: This cable has a rated voltage of 600 VAC for the power conductors.
Q: What jacket material and color does the RKL4621 cable have for protection and identification?
A: The RKL4621 uses a PUR (polyurethane) jacket, colored RAL 2003 orange for visibility and durability.
Q: What is the minimum dynamic bending radius recommended for the RKL4621 cable?
A: The dynamic bending radius for the RKL4621 is specified as 7.5 times the cable diameter.
