PDD205A1121 3BHE025335R1121
May 21, 2026

PDD205A1121 3BHE025335R1121

Manufacturer: ABB Model: PDD205A1121 Part Number: 3BHE025335R1121 Series: 800PEC / 800xA (Excitation & Power Converter Control) Type: Central Excitation Controller / Processor Module Application: Generator excitation systems, medium‑voltage drives, power plant automation, high‑performance motion control

Description

PDD205A1121 3BHE025335R1121.jpg

1. Processor & Memory

  • CPU: 32‑bit high‑performance industrial RISC processor

  • Clock Speed: 500 MHz

  • RAM: 4 GB DDR4 (expandable via 2× SO‑DIMM slots)

  • Flash: 16 GB industrial‑grade (onboard)

  • Battery‑backed SRAM: 2 MB (data retention during power loss)

  • Firmware: Upgradeable via Ethernet or service port


2. Power Supply

  • Input Voltage: 24 VDC ±10% (external) + 5 VDC (backplane)

  • Power Consumption: 28 W nominal, 35 W peak

  • Isolation: 500 VDC (field side to control logic)

  • Redundancy: Dual 24 VDC input supported


3. Communication Interfaces

  • Ethernet: 2 × RJ45 (10/100/1000 Mbps, Modbus TCP, PROFINET, IEC 61850)

  • Serial: 2 × isolated RS‑232/485

  • Fieldbus: PROFIBUS DP, Modbus RTU

  • Fiber Optic: 1 × sync/link port (for power unit synchronization)

  • Baud Rates: 9.6 kbps – 1 Gbps (depending on interface)


4. I/O & Control Features

  • Control Modes: Open‑loop, voltage, current/torque, IR compensation, Hall sensor, encoder, tachogenerator, analog position loop (ANP)

  • Feedback Interfaces:

    • Incremental encoder (5 V/24 V, up to 1 MHz)

    • Hall sensor inputs

    • Analog tachometer (±10 V)

  • Analog I/O:

    • 4 × 16‑bit AI (0–10 V / 4–20 mA)

    • 2 × 12‑bit AO (0–10 V / 4–20 mA)

  • Digital I/O:

    • 8 × isolated DI (24 VDC)

    • 4 × relay DO (250 VAC / 5 A)


5. Environmental Ratings

  • Operating Temperature: −20 °C to +70 °C

  • Storage Temperature: −40 °C to +85 °C

  • Humidity: 5%–95% RH, non‑condensing

  • Vibration: 1 g (5–150 Hz, IEC 60068‑2‑6)

  • Shock: 15 g peak (11 ms)

  • Protection: IP20 (board level)

  • Certifications: CE, UL, RoHS, IEC 61000‑6‑2/4


6. Mechanical

  • Dimensions (W × H × D): 210 × 180 × 35 mm

  • Weight: 0.68 kg

  • Mounting: Rack slot (ABB 800PEC cabinet)

  • Cooling: Natural convection (no fan required)


7. Key Features

  • High Precision: Excitation current control accuracy ≤ ±0.5%

  • Fast Response: Closed‑loop bandwidth > 5 kHz

  • Diagnostics: LED status, fault logging, real‑time monitoring

  • Protection: Overvoltage, overcurrent, short‑circuit, overtemperature

  • MTBF: >250,000 hours (25 °C ambient)


8. Compatibility

  • Systems: ABB 800xA, 800PEC, AC 800M

  • Related Modules: PDD500A101, CMA120, CMA132, CMA136


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