RKL4313 by Bosch Rexroth Indramat

The RKL4313 cable belongs to the RKL Motor Power Cables series produced by Bosch Rexroth Indramat for drive-to-motor power distribution in automated machinery. It houses eight current-carrying elements plus protective earth in one sheath, allowing a single routed line to supply three-phase motor windings while also carrying auxiliary signals. By combining mechanical flexibility with specified electrical cross-sections, the cable helps maintain stable voltage drop and low heating along robot or gantry axes that move continuously during production.

The three main phase cores each have a cross-section of 4.0 mm², and their grouping is listed as 3 + PE, so a dedicated earth path is included for safety bonding. All conductors fit inside one jacket, and the cable is described as having 8 conductors in total. The auxiliary cores on pairs 5-6 and 7-8 are 1.0 mm² and 1.5 mm² respectively, giving capacity for brake release or temperature sensor circuits without making the full cable unnecessarily large. The base material is identified as bulk type INK0603, which indicates the cable construction used for this assembly. During motion, the cable may flex down to a dynamic bend radius of 7.5xD; below that limit, conductor stress rises and service life becomes shorter. Static routing inside a cabinet can use a tighter 5xD radius because repeated flexing is not present.

For use in continuously moving cable chains, the design is rated for 5000000 bending cycles without conductor fatigue. The drive-side termination uses connector RLS0722/K04, while the motor end uses mating plug RLS1201/C04; keyed shells help prevent phase reversal during connection. The operating temperature range of -30 to 80 °C also applies to storage, so reels kept in non-climate-controlled warehouses do not require special handling within that range. This supports use in automated production lines where both repeated motion and consistent electrical performance are required over extended operating periods.