RKL4726 Bosch Rexroth Indramat

Product Description:

The RKL4726 motor power cable is produced by Bosch Rexroth Indramat within the RKL Motor Power Cables series. It serves as a flexible link between the cabinet-mounted drive controller and the motor terminal box, transmitting mains voltage and low-level signals in automated machinery. The construction supports continual motion in drag chains, so it suits pick-and-place axes, packaging stations, and similar industrial equipment where repeated flexing cannot be avoided.

The cable is rated for 5,000,000 bending cycles, indicating the number of dynamic strokes it can endure before conductor fatigue becomes critical. Its core assembly follows the INK0606 bulk cable specification that defines conductor count, screening, and insulation geometry. Separate twisted pairs for encoder or brake logic occupy a 1.5 mm² control wire cross-section, while the power conductors terminate in a factory-fitted RLS0723/K16 connector on the controller end; this plug secures shield continuity and strain relief. When the cable moves, it must respect a minimum dynamic loop of 7.5xD, so for each bend the radius must be at least 7.5 times the outer diameter. For stationary routing, a static radius of 5xD is acceptable, reducing cabinet space without overstressing the copper. The motor interface uses an RLK1301 terminal box that seals the power cores and signal pairs at the housing.

A rugged PUR outer jacket resists mineral oils and coolant splash while keeping cable drag low inside guides. Conductors can operate up to 90 °C when the run is fixed, and up to 80 °C during continuous motion. The sheath diameter is 25.5 mm, a dimension important for clamp design and chain fill calculations. Three phase lines each feature a 16.0 mm² cross-section to handle the drive’s current without excessive voltage drop, and the internal layout sustains electromagnetic shielding along the full length.