RLB2-021CBB by Bosch Rexroth Indramat

The RLB2-021CBB is a motor power cable produced by Bosch Rexroth Indramat within the RLB Motor Power Cables series. It carries power from a drive controller to a synchronous motor in industrial automation systems, allowing the axis to receive controlled torque without extra intermediate wiring. This arrangement keeps the power path simple between the inverter and motor. It is suitable for motion systems that need dependable power delivery during repeated operating cycles.

This model is rated for 5 million flexing operations, which indicates its expected service life on moving machine sections such as cable chains. It belongs to the Power Cables category and uses conductors with a cross-section of 1.0 mm², giving the cable a practical balance between current capacity and overall size. During motion, the cable must maintain a minimum bend radius of 7.5 × D to reduce conductor fatigue and protect the insulation from repeated stress. At the motor end, an M23 Power Connector is pre-assembled for connection to compatible Rexroth motors. The basic version uses a standard PVC jacket without additional shielding layers, and the individual cores use colored insulation to support clear termination.

On the controller side, the cable uses a direct connection, so the cabinet end is left open for routing through a gland or into terminals as required by the enclosure layout. It is intended to interface with ctrlX DRIVE inverters and matches the current requirements of the MS2(X) motor series, which keeps compatibility straightforward within matching motion systems. For fixed installation, the permissible bend radius is 5 × D, allowing tighter routing than in dynamic applications where repeated motion places more stress on the cable. The open controller end and colored core insulation also support orderly cabinet wiring without changing the motor-side connection.