RKL4704 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RKL4704 is a ready-made power cable from the RKL Motor Power Cables series. It features three power conductors with a cross-section of 2.5 mm² and four auxiliary conductors of 1.0 mm². This cable supports up to five million bending cycles and has an operating temperature range from -30 °C to 80 °C.
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Product Description:
The RKL4704 is a motor power cable manufactured by Bosch Rexroth Indramat for the RKL Motor Power Cables series. Supplied as a factory-terminated assembly, the cable connects drive inverters to motors in automated production cells. It carries three-phase power and auxiliary signals without requiring connectors to be crimped at the installation site. Standardized pin assignments support consistent connections, while the completed assembly reduces installation work and helps preserve electrical continuity in motion-control systems.
The cable contains three phase conductors, each with a cross-sectional area of 2.5 mm², providing the current-carrying capacity required for compatible Rexroth servo axes. A dedicated protective-earth conductor completes the grounding path and provides a direct route for fault current. The assembly also contains four auxiliary lines, each with a cross-sectional area of 1.0 mm², for functions such as encoder power, thermal sensing, or brake release. During continuous movement, the sheath supports a dynamic bending radius of 7.5 × D to reduce conductor fatigue at moving cable entries. A minimum static bending radius of 5 × D applies when the cable is secured in a fixed position. Mechanical endurance is rated for 5 million flex cycles, supporting repeated movement in gantry, robotic, and track-mounted applications. The assembly is categorized as a Basic power cable and uses a straightforward PVC jacket without additional shielding layers.
The cable remains flexible and electrically stable across a service temperature range of -30 °C to 80 °C. The same temperature limits apply during long-term storage, allowing the cable to be kept in unheated facilities or other areas subject to substantial temperature changes. Its operating range also supports routing through outdoor trunking and warmer machine spaces without temperature-related derating within those limits. The jacket material is compatible with common strain-relief glands, which help secure the cable at enclosure and motor entry points while protecting it from excessive localized stress.
