RLC1-127BGB by Bosch Rexroth Indramat

The RLC1-127BGB is a flexible power cable produced by Bosch Rexroth Indramat within the RLC1 Motor Power Cables series. It is engineered for routing inside moving cable tracks so that servo motors receive consistent power during repeated machine motion. By interconnecting a drive controller with its matched rotary motor, the cable serves as the power link in industrial automation lines where coordinated motion and rapid cycling are routine. The outer jacket and internal geometry are arranged to tolerate continuous movement while maintaining stable electrical behavior during high-frequency inverter operation. This type of cable is used where moving axes repeatedly extend and retract, such as handling modules, gantries, and transfer systems.

In operation, the cable carries up to 10.4 Aeff through a bundle of 4 individually insulated conductors. Each core has a cross-section of 0.75 mm², which keeps the assembly compact while still supporting reliable power delivery for matched motor loads. Termination is handled by an M23 connector with double clamping; this crimp-and-clamp arrangement resists pullout when actuators accelerate and helps keep the connection secure during repetitive travel. During dynamic motion, the minimum permitted bend radius is 7.5 × D, allowing the cable to move through energy chains without excessive strain on the copper strands.

The mechanical life rating of 5,000,000 bending cycles indicates long-term suitability for repetitive motion. For stationary sections, the cable may be formed down to a 5 × D radius, which helps with compact cabinet and machine routing where movement is not required. Electrical matching is ensured because the assembly is approved for IndraDrive power stages and mates directly with ML3 motors, avoiding the need for custom pin assignments. The conductor arrangement also helps preserve stable current flow as the cable bends and straightens during normal machine cycles.