RKB0023 by Bosch Rexroth Indramat

The RKB0023 is a flexible control cable supplied by Bosch Rexroth Indramat within the RKB Control Cables series. It is used as a USB interface lead that links PCs, HMIs, or service laptops to compatible drives and controllers for parameter transfer and diagnostic communication. Because the assembly has molded connectors and strain-relieved overmolds, it can be routed directly in control cabinets or energy chains without on-site termination, which helps reduce wiring errors. The cable also supports applications where a USB connection must remain available for setup or routine data access.

The cable is supplied as a ready-made harness, so both ends arrive factory terminated. One side uses a host-side USB-A plug, while the device side uses a USB-B plug, matching the standard interface used on many drive service ports. Mechanical life is rated for 5,000,000 bending cycles. During movement, the minimum bend radius is 7.5 x D, and in a fixed position the cable may be routed to 5 x D. The factory-terminated construction avoids field crimping and helps keep the shielding path consistent from end to end. These bend limits help maintain conductor integrity and stable USB communication during repeated motion in drag-chain use.

The assembly is classified as a USB connection cable, which indicates compatibility with the USB 2.0 signaling environment used by many compatible drive families. It remains flexible down to -30 °C, allowing startup in unheated spaces, and its jacket withstands continuous operation up to 80 °C without becoming brittle. This temperature range supports use in moving axes, drag-chain layouts, and compact control enclosures where reliable data exchange is required. The flexible jacket also supports routing near moving components without requiring custom adapter assemblies.