Product Description:

The RH2-521DBB is a hybrid encoder cable produced by Bosch Rexroth Indramat for the RH2 Encoder Cables series. As a second-generation design within the Rexroth Cables product group, it combines servo power lines and encoder cores in a single sheath, replacing separate motor and feedback leads with one extension cable. The motor end uses a hybrid plug, while the controller end is left open for direct termination at the drive. This layout suits automated handling, packaging, and machining cells where a single cable run helps reduce routing complexity around moving axes.

The current-carrying conductors can transmit up to 15.6 A, which suits medium-frame servo axes that draw both power and auxiliary supply through the same line. During continuous motion, the jacket may bend to a radius of 7.5×D, and it remains flexible from −40 °C to 80 °C for use in cold storage zones or heated enclosures. A molded M23 Hybrid connector combines eight power contacts with shielded signal pins, reducing the need for separate feedback plugs at the motor. The cable uses the hybrid cabling code [4 × L + (2 × 0.5 mm²) C + (4 × AWG 24)] StC, which separates motor phases, control pairs, and shielded encoder conductors under a common braid to help preserve signal quality during motion.

Service life is supported by a rating of 5,000,000 flex cycles in energy-chain applications, provided the cable is installed to a static bend radius of 5×D when at rest. Each power core has a copper cross section of 1.5 mm², balancing current capacity, voltage drop, and overall cable diameter. Storage conditions match the operating temperature range, and the extension format supports retrofit work without changing internal cabinet wiring. The fine-strand hybrid layout also helps the cable remain manageable when routed through compact machine frames or carrier systems.