RKG4201T005 by Bosch Rexroth Indramat

The RKG4201T005 is an encoder feedback cable from the RKG Encoder Cables series manufactured by Bosch Rexroth Indramat. It is supplied as a pre-assembled harness for linking motor-mounted encoders to drive controllers so that position data is transmitted with low electrical loss and consistent impedance inside automated machines and material-handling cells. Its intended use is in servo systems where feedback must remain stable during acceleration, deceleration, and repetitive travel. Because it arrives terminated at both ends, the cable also helps maintain shielding continuity across the full run.

The cable is qualified for 5,000,000 flex cycles, indicating a service life suitable for continuous-motion drag-chain routing. A combined bending and torsion tolerance of ± 180/30 cm indicates the maximum curvature and twist the conductors can tolerate without fatigue. With an outside diameter of 8.5 mm, the assembly fits standard energy-chain separators while still housing individually shielded pairs. The overall length is 5.0 m, giving enough reach between the motor and cabinet in mid-sized gantry modules. During motion, the dynamic minimum bend radius is 7.5 × D, so cable trays must maintain an adequate internal radius to prevent tensile stress. A halogen-free orange PUR jacket improves visibility on the machine frame and helps limit corrosive gas formation during a fire.

When the axis is stationary, routing can tighten to a static radius of 5 × D, allowing compact service loops near the encoder housing. Factory-fitted connectors, the motor-side RGS1001 and the controller-side RGS1002, eliminate field crimping errors and help preserve shielding continuity. The PUR sheathing offers high abrasion resistance and good chemical durability against lubricants commonly found in CNC enclosures. Internal wire geometry follows the REG0748 bulk cable design so replacement segments maintain the same impedance and crosstalk behavior as the original assembly.