Product Description:

The RHB2-521DCB is an encoder and power hybrid cable manufactured by Bosch Rexroth Indramat for the RHB2 Encoder Cables series. It links MS2-class servo motors with ctrlX inverters, carrying feedback signals and power conductors within one sheath to simplify machine wiring. The cable uses the basic mechanical design intended for general-purpose motion axes in industrial automation. Combining multiple electrical functions in one assembly also reduces the number of cables that must be routed through a machine.

The cable withstands up to 5,000,000 dynamic flex cycles, supporting continuous movement in cable carriers without premature fatigue. Its conductor layout consists of 4x L + 2x 0.75 mm² + 4x AWG 24 – DS. The larger cores carry motor current, while the smaller conductors transmit encoder signals and include a drain wire for shielding. The cable has a cross-sectional area of 1.5 mm², balancing current capacity with the flexibility needed for moving installations. During motion, the jacket can bend to a minimum radius of 7.5xD, allowing suitable loop lengths to be established for energy-chain routing. Cabinet or extension-lead connections use the SPEEDCON quick-locking system, which provides a secure connection while reducing installation time.

For stationary routing, the cable permits a minimum bend radius of 5xD without damaging its internal conductors. As a hybrid cable, it eliminates the need for separate power and encoder cable runs, simplifying tray layouts and reducing the number of routed assemblies. The motor end has an M23 hybrid connector that matches the Plug S interface used on MS2x motor housings. The drive end follows ctrlX DRIVE pin assignments for direct electrical compatibility. This arrangement supports Series Connection 1 MS2(x) motors connected to Series Connection 2 ctrlX DRIVE controllers. The shared sheath also keeps the associated conductors together throughout moving cable routes, reducing the space required inside carriers and routing channels.