RL2-045FBB Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RL2-045FBB is a motor power cable from the RL2 Motor Power Cables series designed with a 4 x 4.0 mm² power conductor and 2 x (2 x 1.0 mm²) auxiliary conductors. This cable has a basic design with a PUR jacket and supports up to 5,000,000 bending cycles, with an outer diameter of 17.0 mm and a maximum conductor temperature of 90°C when fixed.
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Product Description:
The RL2-045FBB motor power cable is produced by Bosch Rexroth Indramat for the RL2 Motor Power Cables series. Classified under the Rexroth Cable product group, the item uses the basic cable design intended for second-generation motor drives. In servo-based automation systems, it routes three-phase power and control circuits between the drive and motor, maintaining voltage integrity while accommodating continuously moving axes. Its combined conductor arrangement allows one cable to serve the motor phases and auxiliary devices, reducing the number of separate cable runs required along the machine.
The conductive core contains 4 × 4.0 mm² copper conductors that carry the primary motor phases, while a separate group of four 0.75 mm² conductors supports brake or sensor circuits. Each power conductor is rated for 600/1000 V, and the control conductors have a voltage rating of 450/750 V. A PUR outer jacket resists oil and abrasion, protecting the internal wiring during repeated travel through cable carriers. Capacitance between conductors is limited to 0.5 nF/m, which helps reduce common-mode currents that could interfere with encoder feedback. During fixed installation, the conductors can reach +90 °C, whereas operation in dynamic cable chains limits their temperature to +80 °C. For rotary tables or robotic wrists, the assembly tolerates ±30°/m of torsion without damaging the insulation.
The jacket withstands 5,000,000 carrier strokes when the required dynamic bend radius is maintained, supporting repeated movement in automated machinery. Moving installations require a minimum bend radius of 7.5 × D, while stationary runs may use a bend radius of 5 × D without placing excessive strain on the conductors. The cable also includes 2 × (2 × 1.0 mm²) auxiliary conductors arranged as two shielded pairs for temperature sensors or holding-brake feeds. Its overall diameter of 17.0 mm permits entry through compact gland plates while leaving adequate space for insulation, shielding, and internal fillers. These fillers stabilize the conductor groups and help control localized bending as the cable travels through compact machine frames.
