The VW3M5122R30 is a pre-wired power cable from Schneider Electric, 3 m long with a 4 x 2.1 mm² conductor composition. One end has flying leads for the servo drive side; the other carries a metal connector for the servo motor. This variant omits brake wires — it's a straight power feed for the motor windings, no holding brake circuit.
The 3 m length covers most cabinet-to-motor runs inside a machine cell; if your layout needs more reach, you'll need a longer cable or a junction box. The 4 x 2.1 mm² conductors handle the phase currents for a typical small-to-medium servo motor — the cross-section suggests a rating around 6-8 A continuous, though the exact thermal limit depends on ambient and bundling. The metal connector on the motor end is the military-style round type common on Lexium and other Schneider servos; the drive end is bare flying leads, so you terminate into the drive's power terminals or a mating connector block.