RLC1-532ECB by Bosch Rexroth Indramat

The RLC1-532ECB is a motor power cable manufactured by Bosch Rexroth Indramat for the RLC1 Motor Power Cables series. In an automation cell, it supplies three-phase energy and protective earth between an IndraDrive controller and an ML3 servo motor, providing a pre-assembled link that avoids separate connector assembly while preserving shielding integrity. Because the power and auxiliary conductors are bundled in one assembly, the cable suits machine layouts that need clean routing between the drive and the motor. This arrangement supports reliable current delivery on moving axes where cable routing, strain relief, and connector retention affect long-term operation.

The core layout follows a 4x L + 4x 1.0 mm² scheme, which combines four power conductors with four auxiliary control cores for brake or sensor supply. Each power core has a cross-section of 2.5 mm², matching the current requirements of mid-frame ML3 machines. The cable is rated for 5,000,000 flexing cycles in continuous-motion applications such as linear gantries. Under dynamic movement, the cable must maintain a minimum bend radius of 7.5xD, whereas stationary routing can use 5xD. This combination lets one assembly carry motor phase power while also supporting related secondary circuits. The outer jacket is selected to support dielectric stability and repeated motion in cable carriers.

Environmental limits extend from -30 °C during machine storage to 80 °C during operation, allowing installation in unconditioned enclosures or near motor end windings. A circular M23 connector with double clamping secures both shielding and strain relief, reducing micro-movement at the pin interface. The cable is qualified for IndraDrive, IndraDrive C, and IndraDrive Mi axes, supporting electrical compatibility without additional adapters. It is intended for use with ML3 motors, and the connector structure helps keep the shield termination stable during repeated acceleration and deceleration. The cable can be routed through sections that alternate between fixed placement and continuous flexing without requiring a separate auxiliary harness.