RZW02.1-110-040 Bosch Rexroth Indramat
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MPN: R911200545
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The Bosch Rexroth Indramat RZW02.1-110-040 is part of the RZW Braking Resistors series and has a power rating of 110 kW with a resistance of 2.7 Ohms. It features a protection class of IP20, supports a maximum surface temperature of 80°C, and weighs 102 kilograms. The resistor measures 960 mm in height, 795 mm in width, and 490 mm in depth.
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Product Description:
The RZW02.1-110-040 braking resistor is manufactured by Bosch Rexroth Indramat for the RZW Braking Resistors series. Within the platform, it belongs to design 1 of line 2, which establishes its mounting geometry and terminal arrangement. The module is wired across the DC link of Rexroth drive converters, where it transforms regenerated kinetic energy into controlled heat dissipation. This process helps prevent overvoltage faults during rapid deceleration or when controlling downward-moving loads in industrial automation cells.
Rated for continuous absorption of 110 kW, the unit can handle substantial braking energy from high-inertia axes. Its fixed resistance of 2.7 Ω determines the peak discharge current, and connected drives must maintain a minimum permissible resistance of 2.5 Ω when multiple resistors are arranged in parallel. A duty cycle of 40% SD limits operating time so that the internal temperature remains within the permitted range. The 100 s thermal time constant allows the resistor to absorb brief overloads before thermal protection activates. The perforated housing provides IP20 protection against accidental contact with internal components. Because this enclosure does not protect against water or fine contaminants, the resistor requires installation inside a suitably ventilated cabinet.
The element surface may reach 80 °C, so adequate clearance and airflow are necessary around the housing. The unit has a depth of 490 mm, a width of 795 mm, and a height of 960 mm, which must be considered when arranging cabinet space and door clearance. With a mass of 102 kg, the resistor requires a sturdy mounting frame and suitable lifting equipment for installation or service. Power cables with a cross-sectional area of 70 mm² help minimize voltage drop during braking, while the grounding conductor must have an area of at least 10 mm² to provide an adequate fault-current path. Reliable operation is maintained at relative humidity levels up to 90% when condensation is prevented. The thermal performance also remains stable at altitudes commonly encountered in factory installations.
