RL2-065HBB by Bosch Rexroth Indramat

The RL2-065HBB belongs to the RL2 Motor Power Cables series from Bosch Rexroth Indramat. It is a dedicated motor lead for supplying power between drive controllers and second-generation Rexroth servo motors in moving-axis machinery. The assembly uses a four-core load set with auxiliary conductors, providing a pre-engineered connection that supports dynamic motion while maintaining electrical integrity in continuously flexing cable tracks. By combining the motor phases and auxiliary conductors in one jacket, it reduces the need for separate cable runs on compact axes.

The cable is rated for 5,000,000 bending cycles, which indicates long service life when it travels back and forth inside an energy chain. With a continuous current capacity of 53.0 A, the conductor bundle can feed medium-frame motors without thermal overload. A cross-sectional area of 10.0 mm² helps limit voltage drop across typical machine lengths. For permanently fixed routing, the minimum bend radius is 5 x D, which is the smallest bend recommended without placing excessive stress on the copper strands. The outer sheath also tolerates torsional movement up to ±30°/m, allowing the cable to twist in robot wrists or rotary tables without premature conductor fatigue.

During continuous flexing, the bend radius requirement increases to 7.5 x D, and the larger arc helps reduce internal insulation stress during repeated motion. An insulation resistance of 20 M?/km at 20 °C limits leakage current and supports operation with high-frequency inverters. The jacket material is PUR (orange RAL 2003), which provides abrasion resistance and high visibility inside the machine. The conductor layout uses 4x L + 4x 0.75 mm², separating the main power conductors from the auxiliary conductors for organized routing in the same cable track.