RLB2-124KEB by Bosch Rexroth Indramat

The RLB2-124KEB is a motor power cable produced by Bosch Rexroth Indramat within the RLB Motor Power Cables series. It links MS2(X) synchronous motors to ctrlX DRIVE controllers, carrying three-phase power and auxiliary signals for feedback and monitoring in industrial automation. The cable belongs to the Rexroth Cables product group, is classified as a power cable with a basic design, and uses a PUR (RAL 2003) outer jacket suited to chemically aggressive machine-tool environments.

The cable diameter measures 29.8 mm, a dimension that affects gland size, conduit selection, and bend stress. Each power core has a cross-section of 25 mm², so drives can deliver high current without excessive voltage drop. The mains conductors are rated at 600/1000 V, providing margin when used on 480 V AC networks, while the integrated signal pairs carry up to 450/750 V to isolate encoder or brake circuits from noise. The conductors can withstand a maximum temperature of 90 °C, maintaining insulation integrity during continuous dynamic motion. During cable-track operation, the minimum dynamic bending radius is 7.5 × D. The orange polyurethane jacket resists oils and weld splatter, supporting constant movement in gantry axes.

For applications with high cycle counts, the cable is qualified for 5,000,000 flexing operations, supporting long service intervals in pick-and-place lines. Stationary installation can use a static bending radius of 5 × D, permitting tighter routing within control cabinets than during motion. Connection to the motor is simplified by the E (M50) terminal box interface, matching the sealing thread on MS2(X) housings and keeping EMC shielding continuous. The internal geometry keeps the signal pairs separated along the cable length, which helps maintain uniform electrical characteristics during operation.