RKL4409 Bosch Rexroth Indramat

Product Description:

The RKL4409 cable is produced by Bosch Rexroth Indramat and belongs to the RKL Motor Power Cables series used for connecting servo drives to synchronous or induction motors in automated machinery. It carries three-phase output from the inverter to the motor while also providing paired signal conductors for temperature or brake monitoring, so it combines power and limited control in one routed bundle. The design supports continuous motion in cable tracks, making it suitable for pick-and-place axes, gantries, and other installations where the cable undergoes repetitive flexing.

This model handles line potentials of 300/500 V, a rating that aligns with the low-voltage class of most Rexroth drive converters. Each phase conductor has a cross-section of 16.0 mm², giving current capacity that matches medium-frame motors while limiting voltage drop over long runs. DC resistance is only 1.21 Ω/km, so copper losses remain low even when the drive is delivering peak torque. Two shielded control pairs sized at 2 pairs × 1.5 mm² are integrated under the outer sheath to carry brake release or temperature signals without adding a separate feedback cable. The outer construction is approved for drag chain use, meaning the insulation and conductor layup resist abrasion and cyclic torsion derived from millions of bending cycles.

The overall diameter is compact at 25.5 mm, and a matte, adhesion-free PUR jacket resists oils and welding spatter while allowing adjacent cables to slide without sticking. Phase conductors can reach a fixed-installation temperature of +90 °C, so cabinet heat does not prematurely age the insulation; in moving operation the limit is +80 °C, and flexibility is maintained down to −20 °C ambient. For static routing the minimum bend is only 5 × D, while dynamic loops require 7.5 × D, giving machine builders clear guidelines for energy-chain tray layout.