RL2-021CBB Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RL2-021CBB is a basic motor power cable from the RL2 Motor Power Cables series. It features a conductor layout of 4 by 1.0 mm² plus 2 by (2 by 0.75 mm²), with a cross section of 1.0 mm² and a PUR jacket. The cable supports rated voltages of 600/1000 V for power and 450/750 V for signal, and uses an M23 motor connector suitable for 2nd generation motors.
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Product Description:
The RL2-021CBB power cable is produced by Bosch Rexroth Indramat within the RL2 Motor Power Cables series. It is intended to deliver three-phase power and low-level encoder or brake signals between a drive and a second-generation Rexroth synchronous motor through a single molded assembly. By combining power conductors and auxiliary pairs under one jacket, the assembly simplifies routing in industrial automation cabinets and robot arms while preserving electromagnetic compatibility. Classified under the Rexroth Cable product group, the design supports M23 motor connectors and uses a basic configuration for compact installations.
The cable uses a 4 x 1.0 mm² + 2 x (2 x 0.75 mm²) conductor layout, providing four power cores for the motor circuit and two shielded twisted pairs for sensors or brakes. Each power core has a 1.0 mm² cross section and supports drive outputs up to the cable’s rated system voltage of 600/1000 V, while the signal pairs are isolated for circuits limited to 450/750 V. A nominal outer diameter of 12.0 mm keeps the bundle size moderate in energy chains and other confined routing paths. The orange sheath is made of PUR in RAL 2003, providing the abrasion resistance and oil tolerance required by automated machinery.
During dynamic operation, the cable can bend repeatedly around a minimum radius of 7.5 × D. Once installed in a fixed track, the minimum bend radius can be reduced to 5 × D. Copper conductor insulation tolerates continuous service up to 90 °C in stationary runs and up to 80 °C during dynamic cycles, so drive derating is unnecessary at typical cabinet temperatures. A leakage capacitance of 0.4 nF/m limits reactive current at high pulse-width modulation frequencies, helping the drive maintain accurate current control over long cable runs. The separate voltage ratings for the power cores and auxiliary pairs allow motor power, brake control, and sensor circuits to operate within their applicable electrical limits. The molded assembly also keeps the conductors grouped beneath one protective jacket, reducing the number of separate cable paths required between the drive and motor.
