RLB2-043FDB by Bosch Rexroth Indramat

The RLB2-043FDB cable is manufactured by Bosch Rexroth Indramat and belongs to the RLB Motor Power Cables series. It is a flexible motor power lead that routes three-phase supply and protective conductors from a drive cabinet to a connected servomotor in automated machinery. This type of assembly is suited to continuous-motion axes such as pick-and-place modules, gantry bridges, and rotary tables, where constant movement can place repeated stress on both the conductors and the end connections. Its flexible construction helps the cable follow machine travel without putting unnecessary strain on terminals or motor inlets.

Rexroth rates the cable for 5,000,000 bending cycles in cable tracks, indicating repeated flexing during dynamic machine operation. The minimum bending radius is 7.5 × D while the machine is moving and 5 × D when the cable is stationary, so travel sections and fixed sections can be routed to different limits. The operating temperature range extends from -30 °C to 80 °C, allowing the insulation to remain usable in cold zones as well as warm electrical enclosures. A PVC outer sheath surrounds four power cores, control pairs, and an integrated protective earth conductor, helping shield the internal conductors during repeated motion.

The machine side terminates with an M40 Power Connector, which allows quick connection at the motor without separate hand wiring. Each phase conductor has a cross section of 4 mm², and the overall conductor set uses four main power leads together with smaller auxiliary conductors for brake release and sensor or control functions. Compatibility with the ctrlX DRIVE platform and the MS2(X) motor series supports use in coordinated servo systems that need both power delivery and auxiliary signaling through one cable assembly. The direct motor-to-drive connection also avoids extra junction points along the machine frame, which helps keep routing straightforward.