Cummins PCC3.3 AUX 103 AVR PCB 0327-1593

CUMMINS PCC3.3 AUX 103 AVR PCB ASSY (P/N: 0327-1593)

The Cummins PowerCommand® PCC3.3 AUX 103 Automatic Voltage Regulator (AVR) PCB Assembly (P/N: 0327-1593) is an auxiliary excitation and voltage regulation interface module engineered for heavy-duty marine, prime, and critical standby generating sets. Integrated into the PowerCommand® 3.3 (PCC 3300 series) architecture, the AUX 103 sub-assembly handles closed-loop exciter field driver control, alternator terminal sensing, and transient stabilization.

Model Details

• Manufacturer: Cummins Inc. / Cummins Power Generation
• Assembly Type: Auxiliary AVR Printed Circuit Board Assembly (AUX 103)
• OEM Part Number (MPN): 0327-1593
• Alternate Part Formats: 327-1593, 03271593, 3271593
• Hardware Revision Identity: AUX 103 Sub-board / Field Driver Card
• Target Controller Host: Cummins PowerCommand® PCC 3.3 / PCC 3300 System

Technical Details

Features

1. Integrated PMG & Shunt Excitation Drive: Compatible with Permanent Magnet Generator (PMG) and auxiliary winding excitation topologies, delivering up to 12 A peak field forcing during motor startup.
2. Closed-Loop Digital/Analog Regulation: Operates in direct coordination with the PCC3.3 DSP core, ensuring steady-state line-to-line RMS voltage regulation within ±0.5%.
3. Fast Transient Load Compensation: Mitigates severe voltage dip and overshoot via high-speed excitation field boost circuits during single-step 100% block loading.
4. Under-Frequency Roll-Off (V/Hz) Protection: Incorporates slope-configurable under-frequency limiting to safeguard alternator rotor/stator coils against thermal saturation when engine RPM droops.
5. Conformal Coated Marine Construction: Heavy-duty solder masking and Class III conformal coating provide moisture, salt spray, and hydrocarbon vapor isolation across high-vibration engine-skid mounts.

Compatibility

• Engine Platforms
  • Cummins QSK Series: QSK19, QSK23, QSK38, QSK50, QSK60, QSK78
  • Cummins QST & KTA Series: QST30, KTA19, KTA38, KTA50
  • Cummins QSN / QSX / L-Series Platforms: QSX15, L9, and heavy-duty industrial/marine derivatives
• Alternator Frames & Control Consoles
  • Alternators: Stamford (HC4, HC5, HC6, LVSI, P7, P80 series) and AvK alternators equipped with PMG.
  • Controller Panels: Cummins PowerCommand® 3.3 (PCC 3300), PCC 3200 (upgrade retrofits), and high-spec synchronizing power panels.

Part Number Cross-References

• Cummins Standard: 0327-1593
• Cummins Abbreviated: 327-1593
• Alternate Engineering Assembly Codes: 0327-1593-00, 327-1593-01, AUX103 PCB

Applications

• Commercial Marine & Offshore Vessels: Main propulsion auxiliary sets, emergency diesel gensets (EDG), bow-thruster dynamic-response units, and DP2/DP3 offshore vessel sync systems.
• Critical Emergency Backup Power: Mission-critical data center generator banks, tier-4 hospital life support switchboards, and public utilities.
• Industrial & Resource Extraction: Underground mining power stations, remote microgrids, oil & gas drilling rigs, and heavy construction gen-units.
• Parallel Bus Configurations: Switchgear setups utilizing reactive droop compensation (VAr control) and power-factor regulation across multiple synchronizing gensets.

Frequently Asked Questions

What is the primary function of the Cummins AUX 103 PCB (0327-1593)?

The AUX 103 board is the dedicated automatic voltage regulation and excitation driver interface module inside the Cummins PowerCommand 3.3 controller. It samples alternator terminal output voltage, compares it against the controller setpoint, and switches DC power to the exciter stator to maintain stable voltage under varying electrical loads.

Can the 0327-1593 card be used with non-PMG alternators?

Yes, while optimal transient response occurs when paired with a Permanent Magnet Generator (PMG), the board can operate in auxiliary winding / shunt-fed arrangements, provided the input voltage and frequency windows fall within the PCC3.3 application guidelines.

How do I tell if my 0327-1593 board is damaged?

Common physical indicators include discolored thermal trace pads near the heat sinks, blown exciter output fuses, or burning odor near the field terminal block. Functional indicators in the PCC3300 panel include “Exciter Overcurrent,” “Alternator Overvoltage / Undervoltage,” or failure to build up residual voltage during engine run-up.

Does the replacement board require software flashing or firmware programming?

The AUX 103 is primarily a hardware/analog excitation switching card. However, because it interfaces directly with the PowerCommand 3.3 host board, voltage trim, under-frequency slopes, and droop percentages are calibrated through the HMI display or Cummins InPower™ service tool.

What is the difference between part number 0327-1593 and 327-1593?

They represent the exact same component. Cummins commonly adds a leading zero (“0327-1593”) in catalog databases and ERP systems, while physical castings, PCBs, or parts book diagrams frequently drop the zero (“327-1593”).