RKL4531 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RKL4531 is part of the RKL Motor Power Cables series and uses a PUR cable jacket material with a diameter of 30.8 mm. It has a power wire cross-section of 35.0 mm², a control wire cross-section of 1.5 mm², and can withstand 5 million bending cycles. The cable features a RAL 2003 orange jacket and has a conductor resistance of 0.554 Ohm per kilometer at 20°C.
Internal Product Review
The RKL4531 is a robust motor power cable from the RKL series by Bosch Rexroth Indramat, designed for high cycle applications with durability rated to 5 million bending cycles. Its PUR jacket in RAL 2003 orange enhances mechanical protection and visibility for industrial environments. The cable's reliability and flexible performance make it a standout choice for demanding power transmission tasks.
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Product Description:
Bosch Rexroth Indramat supplies the RKL4531 power cable as part of its RKL Motor Power Cables series. This prefabricated assembly routes drive output from a servo inverter to the motor terminals in automated machinery, ensuring low-loss three-phase transmission and simultaneous auxiliary signaling. The cable is engineered for dynamic drag-chain environments and therefore supports repetitive motion cycles typical of pick-and-place modules, palletizing axes, and other high-duty industrial automation stations.
The mechanical endurance rating reaches 5 million bending cycles, indicating the number of full flex motions the cable can survive without conductor fatigue when it is installed in an energy chain. Overall diameter is 30.8 mm, so conduit selection and gland sizing must accommodate that outside dimension. Main power conductors use a cross-section of 35.0 mm², providing a low impedance path for high continuous currents, while the integrated control cores carry a smaller 1.5 mm² section suitable for brake release or temperature sensors. Copper conductor resistance is limited to 0.554 Ohm/km at 20 °C, a parameter that defines resistive losses over long runs and helps calculate voltage drop in distributed drive systems. The jacket material is PUR, selected for abrasion resistance and coolant tolerance.
The sheath is supplied in the high-visibility color RAL 2003 (Orange), allowing quick identification of power circuits inside crowded cable trays. When laid permanently, the assembly can be routed to a minimum bend radius of 5 × D; during continuous motion the dynamic limit is 7.5 × D, where D represents the 30.8 mm outer diameter. Adhering to these values prevents excessive stress on the copper stranding. Electrical coupling between phases and ground is governed by a specific capacitance of 1.2 nF/m, a figure the drive designer uses when selecting output filters or evaluating leakage currents in long cable runs.
