RKL4640 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RKL4640 is a power cable that is part of the RKL Motor Power Cables series. This cable features 4 power conductors of 35.0 mm² and 2 sets of control wires, with an outer diameter of 30.8 mm and a PUR jacket in orange. Designed for drag chain use, it endures up to 5,000,000 bending cycles and offers a conductor resistance of 0.554 Ω/km.
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Product Description:
The RKL4640 motor power cable is manufactured by Bosch Rexroth Indramat as part of the RKL Motor Power Cables series. Designed for drive-to-motor connections in industrial automation, it carries the main phase current and auxiliary control signals through dynamic drag-chain routes used on gantries, pick-and-place portals, and other continuously moving axes. Its flexible construction is approved for continuous drag-chain operation, where the cable must withstand repeated linear movement and tight routing without damage to its insulation or shielding.
The cable is rated for up to 5,000,000 bending cycles, allowing it to maintain electrical performance during long production runs. Its jacket is made of PUR, which provides abrasion resistance against cable-carrier hardware and prevents the surface from sticking during repeated movement. The cable has an outside diameter of 30.8 mm, allowing it to fit common energy-chain cross sections. Power is delivered through four 35.0 mm² conductors, providing sufficient conductor area for inverter output current while limiting voltage drop. The copper conductors have a loop resistance of 0.554 Ω/km. Two double-shielded control pairs, each using 1.5 mm² conductors, are installed beside the power cores to carry brake-release or temperature signals without requiring a separate cable harness.
When installed in a fixed position, the cable can withstand conductor temperatures up to +90 °C. During flexible operation, it remains serviceable at conductor temperatures up to +80 °C, supporting motion in cable carriers and other moving assemblies. Its capacitive load is 1.2 nF/m, which supports suitable output-filter selection and helps keep high-frequency switching behavior predictable. The sheath is orange (RAL 2003), making energized power wiring easier to distinguish inside trays that also contain signal, pneumatic, or fluid lines. Its smooth jacket surface simplifies cleaning in food-processing and packaging equipment. Low dielectric loss and shielded control pairs help reduce interference between auxiliary signals and the adjacent high-current phase conductors.
