RZW02.1-011-015 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RZW02.1-011-015 is part of the RZW Braking Resistors series and weighs 6.2 kilograms. It features a power rating of 11 kW with a resistance of 22 ohms and is protected to class IP20. The braking resistor has dimensions of 686 mm width, 185 mm depth, and 120 mm height.
Internal Product Review
The RZW02.1-011-015 is a Bosch Rexroth Indramat RZW braking resistor rated for 11 kW with 22 Ω resistance. IP20 protection and an 80 °C maximum surface temperature support clean cabinet integration and predictable thermal performance. An 18 s maximum on time with 102 s maximum off time gives this unit a well-balanced duty profile for controlled braking service.
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Product Description:
The RZW02.1-011-015 braking resistor is produced by Bosch Rexroth Indramat as part of the RZW Braking Resistors series. It is an external dissipative module that links to the DC bus of Rexroth drive controllers. When a servo axis regenerates energy during deceleration, the module converts that surplus electrical power into heat, preventing DC-link overvoltage and allowing controlled braking. It is intended for panel mounting inside a control cabinet where forced air maintains a stable surface temperature.
Electrically, the unit handles bursts up to 11 kW of thermal load. A cold resistance of 22 Ω sets the initial current that flows when the resistor is switched across the bus, while the drive application must never drop below 20 Ω in combined resistance to keep conduction within semiconductor limits. The element operates on an intermittent basis, and an operating factor of 15 % SD means it may absorb energy only for a small fraction of the overall duty cycle. The allowable energized window is 18 s per cycle, followed by a mandatory 102 s off-time so the winding core can cool toward the specified maximum surface temperature of 80 °C. Observing these limits protects the ceramic insulation and supports repeated braking without thermal runaway.
The mechanical enclosure follows design 1 of line 2 and measures 686 mm in width, 185 mm in depth, and 120 mm in height, allowing installation alongside other drive accessories on a shared backplate. A rating of IP20 provides finger-safe operation but requires installation in a clean, dry cabinet. The body’s thermal mass, expressed by a time constant of 300 s, moderates temperature swings, while its 6.2 kg weight aids heat storage and structural stability. Power connections use M6 threaded terminals, which simplifies the use of standard ring lugs during field wiring.
