RLB2-125JEB Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RLB2-125JEB is part of the RLB Motor Power Cables series and features four 16 mm² power conductors and four 1.5 mm² auxiliary conductors. This cable has a PUR jacket in orange, a rated voltage of 600/1000 V, and a current carrying capacity of 71.3 Amps. It supports ctrlX DRIVE controllers and the MS2(X) motor series.
Internal Product Review
The RLB2-125JEB is a durable power cable from the RLB series by Bosch Rexroth Indramat, featuring a robust PUR jacket and 4 x 16.0 mm² power conductors. Rated for 71.3 A and 600/1000 V, it is well-suited for demanding motor connections, particularly with the ctrlX DRIVE and MS2(X) series. This cable provides reliable performance and excellent compatibility in industrial environments.
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Product Description:
The RLB2-125JEB is a preassembled motor supply cable produced by Bosch Rexroth Indramat within the RLB Motor Power Cables series. It links ctrlX DRIVE inverters to MS2(X) synchronous motors through a sealed terminal-box interface, providing stable power delivery in automated cells. The preassembled design uses standardized conductor sizing, insulation, and connector geometry, eliminating the need for cable fabrication at the machine.
The main bundle contains four 16.0 mm² copper conductors that carry motor power between the drive and the connected servo axis. These conductors support a continuous phase current of 71.3 A while limiting voltage drop over typical machine cable lengths. The cable also contains four 1.5 mm² auxiliary cores, allowing motor thermistor signals or brake power to travel alongside the phase conductors. Its insulation is rated for 600/1000 V, making the cable suitable for the applicable drive output voltage. When secured in rigid trays, the sheath permits a minimum bend radius of 5 × D, which supports routing through compact control cabinets without damaging the conductors. The basic cable construction maintains a moderate overall diameter for placement in cable trays or energy chains.
For moving axes, the flexible portion requires a minimum bend radius of 7.5 × D, helping prevent shield fatigue during repeated acceleration cycles. The motor end terminates in an M50 threaded coupling that locks into the MS2 terminal box with connection code E, providing strain relief and a sealed connection. Fixed cable runs permit continuous thermal exposure up to 90 °C, while dynamic segments permit conductor temperatures up to 80 °C. The outer jacket is made from orange RAL 2003 PUR, which provides the flexibility required for moving sections of the cable. This polyurethane jacket resists oil, coolant, and abrasion while helping maintain consistent cable performance across multi-axis assemblies.
