RLC1-127ECB by Bosch Rexroth Indramat

The RLC1-127ECB is a flexible motor power cable manufactured by Bosch Rexroth Indramat in the RLC1 Motor Power Cables series. Intended for servo and spindle connections, the cable delivers drive output directly to the motor while maintaining electromagnetic compatibility along the route between the inverter and the machine actuator. In automated cells, it bridges the cabinet and moving axis assemblies, allowing cyclic motion without signal loss or excessive thermal stress. Its flexible construction suits applications where a servo or spindle motor moves repeatedly during normal machine operation.

Bending durability reaches 5,000,000 cycles, indicating that the jacket and conductor bundle can flex through that many repetitions before fatigue limits are approached in a drag-chain installation. The copper cores have a cross section of 2.5 mm², so the cable can carry medium-power motor currents without excessive resistive heating. During motion, a dynamic bending radius of 7.5 x D must be observed; this is the minimum loop radius that helps protect conductor integrity under acceleration. The motor end terminates with a robust M23 Power circular plug for sealed mating to compatible Rexroth servo motors. Continuous operation is permitted at ambient temperatures up to 80 °C, matching the insulation limits used for typical enclosure environments.

When stationary, the cable may be coiled down to a static radius of 5 x D, letting it route tightly inside control panels without overstressing the insulation. Operation in cold factories is supported because the cable remains flexible down to -30 °C, and the same lower limit applies to storage. A direct motor-to-drive connection eliminates intermediate terminal blocks, reducing voltage drop along the power path and simplifying cable routing between the inverter and the motor. The upper storage temperature matches the operating ceiling, so indoor warehousing conditions remain straightforward when the cable is kept on its spool.