Technical Specifications
Model UFC912A101. Order number 3BHE039426R0101. Supply 24 V DC, 18 to 32 V range, plus minus 20 percent. Consumption 5 to 15 W application dependent. 8 configurable DO or AO channels, 12-bit analog output. Isolation 1500 V AC, 4 kV opto. Communication Ethernet Modbus TCP, 1 Gbps fiber in excitation role. Scan update 10 ms, excitation calc 0.05 ms. Operating temperature -20 to plus 70 C drive, -25 to plus 75 C exciter. Dimensions bare plate about 80 mm by 90 mm by 23 mm, weight 0.06 kg. Protection IP20. Hot-swap in compatible rack.
Functional Features
Hybrid DO or AO to backplane without external converter. Triple-CPU excitation AVR with PSS, overexcitation and underexcitation limiter. Non-volatile flash stores calibration. LED status. Redundant trigger channel in exciter.
Application Scenarios
ACS6000 MV drive external I/O interface. UNITROL 6000 exciter regulator. Thermal plant fan pump drive auxiliaries. Hydro generator excitation retrofit.
Material and Structure
Compact plug-in PCB, gold edge connector, terminal headers, status LEDs, opto-isolators, FPGA or DSP on excitation variant.
Working Principles
Drive mode mirrors CPU outputs to field terminals and returns feedback. Excitation mode triple CPU runs AVR loop, outputs field reference via AO or fiber to thyristor bridge, applies PSS damping, reports to 800xA.
Installation Requirements
Plug into ACS6000 rack slot or UNITROL rack, retain screws, 24 V DC isolated, static strap during handling, redundant exciter pair needs identical flash image.
Usage Notes
Confirm firmware role, drive EOI and excitation UFC912A101 differ by flash image, swapping blindly corrupts config. Verify 3BHE039426R0101 sticker matches silkscreen.
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