Technical Specifications Specified DC bus voltage matching corresponding drive model. Fixed braking power and resistance parameter. Operating temperature 0 ℃ to +60 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Integrated over‑temperature, over‑current protection function.
Functional Features Dissipates regenerative energy generated during motor deceleration and braking. Controls DC bus voltage within safe operating range. Transmits module temperature and fault status signals to main drive control board. Built‑in protection circuit triggers protection action when abnormal operating condition appears. Front‑panel LED indicates module working and fault state.
Application Scenarios Special‑spec brake unit spare part for ABB designated frequency converter models. Used for drive equipment requiring frequent dynamic braking.
Performance Parameters Matching rated energy dissipation capacity. Rapid over‑temperature protection response. Stable cyclic braking working performance.
Material Composition Metal heat‑dissipating housing. High‑power braking resistor group, power switching components. Protection and signal processing circuit board. High‑current power terminals and signal connectors.
Structural Characteristics Metal enclosed rack‑mount module. Front side equipped with high‑current power terminals and signal terminals. Heat dissipation fins on housing surface. Screw mounting holes for cabinet fixing.
Working Principle Regenerative energy feedback raises DC bus voltage, trigger condition activates internal power switch. Regenerative electric energy is converted into heat energy and consumed by braking resistor. Thermal sensor monitors internal temperature continuously, protection circuit cuts off working loop when over‑temperature or over‑current happens.
Installation RequirementsFasten EHDB280‑21‑11 to cabinet mounting position. Complete DC bus power wiring and signal wiring according to terminal diagram. Reserve enough ventilation space for heat dissipation. Restore power supply, perform drive commissioning and test motor braking performance.
Usage Notes Confirm model parameter matches host frequency converter configuration. Strictly follow safety operation procedure for DC bus discharge. Keep heat dissipation channel unobstructed. Hot‑plug under powered state is prohibited. Verify braking function and temperature rise after installation.
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