Technical Specifications DC‑bus voltage sampling input, brake power device drive output. Auxiliary working power input interface. Operating temperature 0 ℃ to +70 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Hardware over‑voltage threshold comparison circuit integrated.
Functional Features Samples real‑time DC‑bus voltage signal of drive system. Compares measured voltage with preset brake activation threshold. Outputs drive signal to turn‑on brake power component when over‑voltage occurs, surplus regenerative energy is consumed on brake resistor. Stops drive output when DC‑bus voltage falls below threshold. On‑board indicator lamp displays brake working state and fault alarm.
Application Scenarios Spare brake control board for ABB external brake unit. Suitable for lifting, crane and frequent deceleration drive equipment maintenance.
Performance Parameters Fast DC‑bus over‑voltage detection response. Stable brake drive output performance. Reliable regenerative energy suppression capability.
Material Composition Multilayer glass‑fiber epoxy printed circuit board. Voltage sampling, threshold comparison and power drive assemblies. High‑voltage‑resistant connectors and metal fixing hardware. Conformal protective coating.
Structural Characteristics Rectangular circuit board. High‑voltage sampling connector and brake drive connector located on board edges. Screw mounting holes for cabinet fastening.
Working Principle NKST11‑15 continuously samples DC‑bus voltage value. When voltage exceeds brake threshold, internal circuit outputs drive signal to activate brake power device. Regenerative energy is dissipated by brake resistor. When voltage drops to safe range, brake device is shut down.
Installation Requirements Wear anti‑static wrist strap. Fasten NKST11‑15 to cabinet mounting position. Insert all sampling and drive connectors completely. Restore power supply, perform motor deceleration test and verify brake function.
Usage Notes Brake resistor parameters shall match board threshold setting.
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