RKL4641 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RKL4641 is part of the RKL Motor Power Cables series and features four power conductors with a cross-section of 50.0 mm² and two pairs of control wires with 2.5 mm² cross-section. It is built with a PUR matte orange jacket and has a total shield, offering a conductor resistance of 0.386 Ohm/km and an outside diameter of 36.8 mm.
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Product Description:
The RKL4641 is a prefabricated motor power cable manufactured by Bosch Rexroth Indramat for the RKL Motor Power Cables series. It supplies three-phase power and auxiliary control signals between an IndraDrive inverter and a servo or spindle motor. The cable forms part of the energy chain in automated machines, presses, and material-handling cells where flexible, shielded cabling is needed to limit electrical noise and support dynamic motion axes.
Four copper power conductors have Class 6 flexibility, so the strands tolerate continuous bending in cable tracks while maintaining a direct-current loop resistance of 0.386 Ω/km. Each phase has a cross-sectional area of 50.0 mm², providing current-carrying capacity for medium-power drives without excessive voltage drop. A thermoplastic elastomer sheath brings the overall outside diameter to 36.8 mm. The construction remains compact by combining two signal pairs and a drain wire under a total shield that blocks radiated electromagnetic interference from the switching waveform. The power conductors and shielding help control leakage current, motor insulation stress, and conducted emissions during operation.
The two twisted control pairs use conductors with a cross-sectional area of 2.5 mm². These cores are reserved for temperature sensors or holding-brake supply lines that must maintain low impedance over long runs. Capacitance between phases is limited to 1.3 nF/m, reducing reactive current and permitting accurate drive-side ground-fault monitoring. The outer jacket is orange (RAL 2003) for quick identification of energized motor leads. It is molded from wear-resistant PUR with a matte surface that resists oil, weld spatter, and abrasion while sliding through cable carriers. The prefabricated assembly does not require additional conduit or field termination work, which simplifies installation in high-cycle industrial automation equipment.
