Technical Specifications DC bus signal sampling interface, brake resistor driving output terminals. Auxiliary power 24 V DC, typical power consumption 4.9 W. Operating temperature 0 ℃ to +60 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Conformal coated printed circuit board.
Functional Features Samples DC bus voltage signal in real time. Triggers brake chopper switch‑on action when DC bus voltage exceeds threshold value. Controls excess energy to be consumed through external brake resistor. On‑board LED indicates working status and hardware fault condition. Built‑in hardware self‑diagnosis detects sampling circuit and brake loop faults.
Application Scenarios Brake control spare part for ABB industrial frequency converter. Applied for hoist, conveyor and high‑inertia load drive equipment maintenance.
Performance Parameters Fast DC bus voltage response speed. Stable brake chopper control capability. Reliable over‑voltage protection performance.
Material Composition Multilayer glass‑fiber epoxy printed circuit board. Voltage sampling, logic control and driving assemblies. Conformal protective coating. Signal sampling terminals and power output connectors.
Structural Characteristics Cabinet fixed‑mount circuit board. Equipped with high‑voltage sampling terminals and control signal connectors. Reserved mechanical fixing holes. Weight approximately 0.48 kilogram.
Working Principle DC bus voltage signal is sampled and sent to internal logic circuit. When voltage rises above preset threshold, control signal is output to turn on brake chopper. Regenerative energy is dissipated via external brake resistor. Diagnosis circuit continuously monitors sampling circuit and brake loop operating state.
Installation Requirements Secure APBU‑44C to designated cabinet mounting position. Complete DC bus sampling wiring and brake resistor loop connection. Restore power supply, verify DC bus sampling value and dynamic braking performance.
Usage Notes Observe high‑voltage safety operation rules during maintenance. Confirm brake resistor parameters match drive specification. Implement anti‑static protection during handling. Test deceleration braking function after board replacement.
There are no reviews yet.