RKL4757 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RKL4757 is part of the RKL Motor Power Cables series and features power wires of 4 by 10.0 mm² and control wires of 2 by 1.0 mm² plus 2 by 1.5 mm². Its jacket is made of PUR in RAL 2003 orange, is halogen-free, and the cable has an outer diameter of 22.2 mm. The conductor resistance is 1.91 Ohm per kilometer, and the maximum temperature for fixed installation is 90°C.
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Product Description:
The RKL4757 is a motor power cable assembled by Bosch Rexroth Indramat for use within the RKL Motor Power Cables series. It links synchronous or asynchronous servo motors to their drive converters in automated production lines, carrying mains voltage, protective earth, and feedback channels in one sheath. The hybrid layout reduces panel space, supports energy-chain movement, and keeps emitted interference within the limits demanded by industrial automation cells.
Four copper conductors sized 4x10.0 mm² supply the main phase current, while two signal pairs sized 2x1.0 mm² + 2x1.5 mm² handle temperature or brake circuits. At 20 °C the loop exhibits a conductor resistance of 1.91 Ohm/km, a value that limits voltage drop over long cable runs and guides drive parameter settings. The specified discharge capacity of 1.0 nF/m characterises the parasitic capacitance between cores and shield, information that influences permissible cable length when using high-frequency PWM output. Mechanical bulk is defined by an outer diameter of 22.2 mm, allowing correct selection of strain-relief fittings, cable glands, and drag-chain compartments.
The halogen-free PUR jacket, identified by material code PUR, withstands cutting fluids and abrasion, and its high-visibility tone RAL 2003 (Orange) helps trace power circuits inside crowded machines. Thermal service limits are split: fixed routing can be operated up to 90 C, whereas continuously flexing sections are rated to 80 C to prevent insulation embrittlement. Additional installation data include a minimum bend radius of 111 mm for stationary placement and 166.5 mm during dynamic motion. These parameters ensure electromagnetic, thermal, and mechanical compatibility when integrating the cable into energy chains, cable trays, or motor junction boxes.
