RLB3-044ECB by Bosch Rexroth Indramat

The RLB3-044ECB motor power cable is produced by Bosch Rexroth Indramat for the RLB Motor Power Cables series and belongs to the Rexroth Cables product group. It follows a basic cable design intended for use between an EFC frequency converter and MS2(X) synchronous motors, supplying the three-phase power those drives require. Classified as a power cable, it supports mobile machine elements where continuous flexing is expected, while still allowing a direct motor-drive connection without intermediate terminal boxes.

Its rated bending life is 5,000,000 cycles, indicating how many flexing movements the jacket and conductors can endure before fatigue becomes likely. During dynamic routing, the cable must respect a minimum bend radius of 7.5xD, which helps prevent conductor strand fracture when it moves inside a drag chain or robot arm. When the installation is fixed, the allowable bend radius tightens to 5xD, letting builders arrange tighter loops inside control cabinets. The thermoplastic insulation remains pliable down to -30 °C and resists softening up to 80 °C, so the same assembly can be used in chilled rooms or near warm motor housings without a change in electrical insulation behavior.

A motor plug type V mates directly with the MS2(X) stator connector, eliminating custom terminations at the machine end. Each power core has a cross-section of 2.5 mm², matching the current draw of midsize servo axes while helping limit voltage drop across typical cable lengths. The cable uses a direct motor-drive connection, so shielding and grounding are already configured for low-impedance return paths. Compatibility with the EFC controller family allows the same cable to be used with multiple inverter ratings in the product line. This arrangement reduces the need for separate interface hardware between the drive and motor.