Product Overview

The ABB DDC779BE02, part number 3BHE006805R0002, is an ABB electronic control board associated with power-electronic and high-power converter systems. ABB's own PCS6000 service documentation identifies DDC779BE02 as a 12-pulse firing board, with the SAP number 3BHE037945R0001 for that service-manual configuration.

The exact part-number relationship is important because third-party listings sometimes describe 3BHE006805R0002 as a controller, communication module, distributed module, or interface board. However, technical references also identify DDC779BE02 / 3BHE006805R0002 as an electronic board used within ABB power-conversion equipment.

For maintenance teams, the DDC779BE02 is therefore best treated as a specialized ABB control/interface component rather than a general-purpose PLC I/O module.

Technical Parameters

• Manufacturer: ABB
• Model: DDC779BE02
• Part Number: 3BHE006805R0002
• Product Type: Electronic control / firing board
• Associated System: ABB PCS6000 and related power-electronic equipment
• Documented Function: 12-pulse firing board
• Board Format: Plug-in electronic control board
• Typical Application: High-power converter and power-electronic control
• System Role: Control and interface circuitry within a larger converter system
• Service Consideration: Exact configuration should be verified against the equipment documentation and board revision

ABB's PCS6000 service manual specifically lists DDC779BE02 under replaceable control components in the drive unit (DRU) and identifies it as a 12-pulse firing board.

Because some online sources publish conflicting specifications for this part number, parameters such as operating temperature, current rating, dimensions, communication interfaces, or memory capacity should not be treated as confirmed ABB specifications unless they are verified against the applicable equipment documentation.

Functional Design

The DDC779BE02 belongs to the control electronics used in high-power conversion equipment. A firing board typically forms part of the control chain responsible for generating and managing firing signals for power semiconductor devices.

In a converter system, the control electronics must coordinate switching events accurately while maintaining appropriate electrical isolation between low-voltage control circuitry and higher-power sections. The DDC779BE02 is consequently an important component within the converter's overall control architecture.

Its surrounding system may include:

• Control processors
• Power semiconductor assemblies
• Pulse and interface circuits
• Measurement and feedback circuitry
• Protection and diagnostic functions
• Auxiliary power supplies
• Converter cooling and mechanical assemblies

The board should therefore be evaluated together with the complete converter architecture rather than as a standalone PLC controller.

Application Areas

ABB PCS6000 equipment is used in demanding power-electronics applications, and the DDC779BE02 is relevant to systems where precise converter control is required. Depending on the specific equipment configuration, applications can include:

• High-power industrial converters
• Medium-voltage drive systems
• Renewable-energy power conversion
• Large rotating-machine applications
• Generator and excitation-related systems
• Industrial process drives
• Heavy-duty electrical power systems

Current industry listings also associate DDC779BE02 with ABB power-electronic control boards used in PCS6000 high-power converter applications.

For maintenance engineers, this makes the part particularly relevant when servicing older ABB converter installations where an original control board may need replacement.

Installation and Maintenance

Replacement of the ABB DDC779BE02 3BHE006805R0002 should be performed by qualified personnel familiar with ABB converter systems. The board may be part of equipment containing hazardous electrical energy, so the applicable isolation, discharge, and lockout procedures must be completed before accessing the converter electronics.

Before installation, verify:

1. The complete part number 3BHE006805R0002.
2. The board designation DDC779BE02.
3. Hardware and revision information.
4. The converter model and system configuration.
5. Connector positions and cable identification.
6. Power-supply and interface requirements.
7. Any parameter or calibration requirements associated with the replacement.
8. Diagnostic status after the system is returned to service.

ABB's PCS6000 service documentation identifies the DDC779BE02 as a customer-replaceable control component in the DRU section, which provides useful guidance for maintenance planning.

When replacing a board, technicians should avoid assuming that a visually similar DDC-series board is interchangeable. The exact part number, revision, application, and associated converter configuration should be confirmed first.

Spare Parts and Supply

The ABB DDC779BE02 3BHE006805R0002 is a specialized industrial automation spare part suited to maintenance and repair of compatible ABB power-electronic systems. Keeping the correct replacement board available can help reduce the time required to restore equipment following an electronic control-board failure.

We supply ABB industrial automation and power-electronics spare parts, including control boards, converter components, DCS modules, PLC components, communication modules, and related industrial control hardware.

For DDC779BE02 / 3BHE006805R0002, customers can contact us to confirm availability, product condition, hardware revision, compatibility, lead time, and quotation before ordering.