Product Description:

The RZW02.1-011-006 braking resistor is manufactured by Bosch Rexroth Indramat and belongs to the RZW Braking Resistors series. Intended for use with compatible servo and inverter drives, this component dissipates regenerative energy by converting electrical power from the DC link into heat whenever the connected motor decelerates. Incorporating such a resistor keeps the intermediate circuit voltage within safe limits, minimizes stress on power semiconductors, and allows rapid stopping cycles that are common in packaging lines, gantry axes, and other automated machinery.

The unit has a continuous dissipation capacity of 11 kW, meaning that during permitted conduction periods, the assembly can convert that amount of electrical power into thermal energy without exceeding its temperature limits. Its nominal resistance is 22 Ω, while a minimum resistance of 20 Ω prevents overcurrent when the DC bus reaches peak voltage. The operating factor is 6% SD, and the specified load cycle is 120 seconds, so the resistor may conduct for only a small portion of each cycle. This window is further restricted by a maximum on-time of 7.2 seconds, followed by a mandatory off-time of 112.8 seconds. This timing pattern protects the element from thermal saturation during aggressive braking sequences.

The housing measures 686 mm in width, 92 mm in depth, and 120 mm in height, providing a slim profile for panel mounting inside IP20 control enclosures. With a mass of 3.4 kg, the resistor can be fastened without heavy support brackets. Its Design 1 and Line 2 classification corresponds to the standardized mounting holes used across the series. A thermal time constant of 300 seconds indicates how long the element takes to reach 63% of its final temperature after a load step. This value helps determine allowable braking sequences while accounting for the internal thermal limits of the resistor.