RZW02.1-160-060 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RZW02.1-160-060 is part of the RZW Braking Resistors series and has a power rating of 160 kW with a thermal time constant of 100 seconds. Each unit measures 995 mm wide, 960 mm high, and 490 mm deep, and weighs 126 kg. The resistor features an IP20 protection class, a resistance of 4.8 ohms per unit, and supports max surface temperatures of 80 degrees Celsius.
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Product Description:
The RZW02.1-160-060 braking module is manufactured by Bosch Rexroth Indramat for the RZW Braking Resistors series. As a dynamic resistor bank, it connects to drive converters to dissipate regenerated energy and keep DC-bus voltage within safe limits during rapid motor deceleration. The device is intended for cabinet mounting in industrial automation systems where large servo axes or spindle inverters require controlled braking power. During deceleration, the module converts excess electrical energy into heat instead of allowing it to accumulate in the drive’s DC link.
Each resistor stack delivers 160 kW of braking capacity at a resistance of 4.8 Ω, which is matched to the DC link of line 2 drive packages. The assemblies permit continuous engagement for 72 s, followed by a recovery period of 48 s for repeated stops. The enclosure has an IP20 rating, so the module must be installed inside a protected panel that prevents unintended contact and exposure to contaminants. Externally accessible surfaces may reach 80 °C at full load, making adequate clearance and ventilation important within the cabinet. The module measures 995 mm wide, 960 mm high, and 490 mm deep, while its mass of 126 kg per section requires rigid mounting points. Electrical connections use M10 studs, and the design 1 layout contains a 2 × C7 element arrangement for parallel wiring in high-current links.
The operating factor is 60% SD, allowing the resistor to remain energized for 60 percent of its thermal cycle without exceeding its operating limits. For applications with multiple braking events, the drive controller must ensure that the network resistance never falls below the minimum connectable value of 2.2 Ω to avoid overcurrent. A thermal time constant of 100 s indicates how quickly the resistor element heats and cools during changing loads. This thermal behavior can be used to evaluate energy pulses against the available mass and surface area. Cabinet airflow must remove the generated heat while maintaining sufficient spacing around the resistor bank. Braking sequences must also provide enough recovery time between high-energy stops to prevent excessive thermal accumulation.
