IKG4015 by Bosch Rexroth Indramat

Bosch Rexroth Indramat manufactures the IKG4015 power cable as part of the IKG Motor Power Cables series. It is used to connect servo drives to rotary or linear motors, carrying both three-phase power and auxiliary control circuits. Within automated production cells, cabling of this type reduces wiring effort, supports electromagnetic compatibility, and helps maintain consistent motor torque during rapid duty cycles. By combining power and auxiliary conductors in one sheath, the assembly keeps axis wiring compact and reduces the number of separate cable runs between the drive and motor. The design also supports mobile cable chains used on pick-and-place axes.

The power section uses four conductors in a 4x1.0 mm² arrangement, a size suited for moderate continuous currents in compact actuator packages. Under standard 20 °C conditions, the loop resistance is 19.5 ?/km, so voltage drop remains low over typical routing distances. A polyurethane outer jacket identified as PUR resists oil, abrasion, and weld spatter that can be present in machining cells. Despite that protection, the overall diameter is only 12.0 mm, allowing use in tight cable trays and closely packed moving carriers. For the motor phase circuit, the insulation is rated at 300/500 V, while the control pair operates at 300/300 V. In fixed installation, bends down to 5 × D are permitted without stressing the insulation.

The auxiliary conductors inside the sheath are arranged as 2x(2x0.75 mm²) twisted pairs, giving separate channels for thermal sensors or holding-brake coils. These smaller wires share the main insulation but carry lighter currents, so their 300/300 V class is sufficient. The twisted layout also helps reduce interference on low-power auxiliary circuits routed beside the motor leads. Copper strands may reach 90 °C in fixed installation, and the dynamic limit is 80 °C. During continuous motion, routing must respect a minimum loop of 7.5 × D to avoid conductor fatigue. The cable exhibits a specific capacitance of 0.6 nF/m, which helps limit reactive current at high PWM switching frequencies.