RKL4641 by Bosch Rexroth Indramat

The RKL4641 power cable is produced by Bosch Rexroth Indramat and belongs to the RKL Motor Power Cables series. It is supplied as a prefabricated motor lead that carries drive power and low-level control signals between an IndraDrive amplifier and a synchronous servo motor in automated machinery. The cable is designed for continuous motion inside cable carriers, so its construction helps prevent conductor fatigue while maintaining signal integrity in high-cycle industrial environments. A polyurethane exterior and a fully screened core set make it suitable for dynamic routing near drives, sensors, and I/O cabinets.

Each power core in the cable uses Class 6 stranding, giving the lead the flexibility needed for tight bending radii common in gantry and pick-and-place axes. The DC loop resistance is limited to 0.386 ?/km, which minimizes voltage drop over long cable runs. Drive current is carried on copper conductors with a cross section of 50.0 mm², and the motor phases are distributed across 4 power wires to help balance thermal loading. Separate control and brake functions use cores sized at 2.5 mm², keeping low-level circuits isolated from the high-power conductors while sharing the jacket. The cable's discharge capacity of 1.3 nF/m helps predict common-mode currents during EMC planning.

The signal conductors are arranged in 2 twisted pairs that reduce crosstalk and maintain the differential impedance required by encoder channels. The overall bundle measures 36.8 mm in diameter, and the matte surface makes the cable easier to grip during handling. A tough PUR outer jacket colored orange (RAL 2003) withstands oils and welding splatter, while its low-friction finish guides smoothly through drag-chain links. Beneath the sheath, a Total Shield of tinned copper braiding and aluminum laminate blocks electromagnetic interference so that motor temperature sensors and brake release circuits can operate without data errors.