Technical Specifications Model: NDBU‑95 Part Number: 64008366 DDCS Channel: 1 optical input channel, 9 optical output channels Communication Rate: 10 MBd Power Supply: 24 VDC ±10 % LED Indicators: LED for each channel to show signal receiving status Mounting Method: 35 mm DIN‑rail mounting Operating Temperature: 0 ℃ to +50 ℃ Storage Temperature: ‑25 ℃ to +70 ℃ Relative Humidity: 5‑95 %, non‑condensing Protection Class: IP20 Certifications: CE
Functional Features Active regeneration and fan‑out for DDCS optical signal, supports star‑network DDCS bus structure. One input channel distributes signal to nine independent output channels. Each output channel possesses independent signal‑regeneration circuit; single‑channel fault does not affect other channels communication. Individual LED indicator for each channel displays optical signal receiving status. DDCS communication rate up to 10 MBd adapts to high‑speed multidrive data exchange requirement. DIN‑rail modular structure for convenient installation inside drive cabinet. Hardware self‑diagnosis monitors power‑supply abnormality and optical signal loss.
Application Scenarios Spare‑part replacement for NDBU‑95 branching unit in ABB ACS600 / ACS800 multidrive cabinet. Star‑topology DDCS communication networking for multi‑inverter unit large‑capacity drive system. Optical‑bus signal distribution for paper‑making, metallurgy and cement plant multidrive equipment. Transformation of legacy DDCS bus network from daisy‑chain to star topology.
Installation Requirements Clip NDBU‑95 onto 35 mm standard DIN‑rail inside drive cabinet, keep horizontal installation orientation. Complete 24 VDC power‑supply wiring at power terminal block, tighten terminal screws. Connect master‑station optical fiber cable to input optical port. Connect each slave‑station optical fiber jumper to corresponding output optical ports. Reserve sufficient space around module for heat dissipation, do not block ventilation openings. Ambient operating temperature shall maintain within 0 ℃ ~ +50 ℃ without condensation. Verify each channel LED status and DDCS communication function after power‑on.
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