Product Description:

The RKL4443 power assembly is produced by Bosch Rexroth Indramat as part of the RKL Motor Power Cables series. It serves as the dedicated link between converter output stages and motor stators, carrying electrical power and auxiliary signals so the drive can control torque, brake operation, and sensor feedback in automated equipment. The cable is intended for installation in cable chains or static trays found in packaging lines, transfer modules, and general CNC machinery.

Four copper conductors, each with a cross-sectional area of 6.0 mm², form the power core. This conductor size supports continuous current at the cable’s rated operating voltage of 300/500 V without excessive temperature rise. The conductor resistance is 3.30 Ω/km at 20 °C, allowing voltage drop and line losses to be calculated for long machine axes. Mutual capacitance is limited to 0.8 nF/m, which minimizes the reactive current drawn by modern pulse-width-modulated drives. A separate pair of 1.0 mm² control wires and another pair of 1.5 mm² control wires are integrated to supply holding brakes and PTC thermistors. The cable contains four power conductors and four auxiliary conductors, allowing power and control circuits to follow one compact route through the machine.

The bulk cable reference is INK0604, identifying the base cable used to manufacture the completed assembly. A flame-retardant, halogen-free PUR outer jacket in orange (RAL 2003) resists coolants and oils while remaining easy to trace inside a cabinet. For fixed installation, the cable requires a minimum bend radius of 5 × D. In continuously moving drag chains, the minimum bend radius increases to 7.5 × D to protect the conductors and insulation from repeated mechanical stress. Because the material contains no chlorine or bromine, it produces fewer corrosive and toxic gases during a fire. The polyurethane sheath also maintains the flexibility needed for movement across typical factory operating temperatures.