RKL4728 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RKL4728 is part of the RKL Motor Power Cables series and features a bulk cable type of INK0607. This cable supports 5 million bending cycles, has an outer diameter of 29.8 mm, and provides a power wire cross-section of 25.0 mm² with a control wire cross-section of 1.5 mm². It uses the RLK1301 motor connection and RLS0724 (K25) controller connector.
Internal Product Review
The RKL4728 is a robust motor power cable from the Bosch Rexroth Indramat RKL series, utilizing an INK0607 bulk cable and supporting 5 million bending cycles for demanding dynamic applications. With a power wire cross-section of 25.0 mm² and controller compatibility via the RLS0724 (K25) connector, this cable is engineered for durability and secure connections. This makes the RKL4728 ideal for installations requiring long service life and high mechanical resilience.
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Product Description:
The RKL4728 motor power cable is supplied by Bosch Rexroth Indramat within the RKL Motor Power Cables series. It is intended to deliver three-phase energy and feedback signals between an IndraDrive controller and a servomotor in automated production cells. The cable’s hybrid construction supports power transmission along with auxiliary control cores, making it suitable for handling robots, linear modules, and other moving axes that require simultaneous motion and sensor communication.
Designed for continuous dynamic motion, the cable endures 5 million flex cycles when routed in drag chains. Its bulk conductor set uses the INK0607 construction code, which includes insulation, shielding, and jacket materials optimized for high-frequency drive outputs. Line-to-line capacitance is limited to 1.1 nF/m to keep reactive current within drive tolerances, while DC resistance measures only 0.78 Ω/km at 20 °C for efficient power delivery. In addition to three 25.0 mm² power cores, the assembly carries four control conductors. Each auxiliary core has a cross-sectional area of 1.5 mm² to support encoder power, brake release, or thermal sensor circuits without excessive voltage drop.
Factory-installed connectors simplify integration: the controller side terminates in an RLS0724 (K25) plug, and the motor side mates with an RLK1301 receptacle. The cable permits a dynamic bending radius of 7.5 × D during motion and a static bending radius of 5 × D for fixed routing, where D is the overall jacket diameter. With an outer diameter of 29.8 mm, these radii provide clearances that fit standard energy chains while helping prevent conductor fatigue. The 25.0 mm² power bundle and screened signal pair support full motor current delivery and low-noise feedback in environments that subject wiring to constant acceleration. Proper routing within the permitted bending limits protects the internal conductors from excessive mechanical stress during repeated movement.
