ABB SDCS-CON-2A 3BHE004059R0001

Technical Dossier

Product Details And Specifications

ABB SDCS Series Technical Notes

The Evolution of SDCS Architecture

The SDCS series was introduced as the control backbone for ABB's second-generation DC drive platforms. Early variants such as the SDCS-CON-1 and SDCS-CON-2 used parallel backplane communication with discrete analog signal conditioning. The SDCS-CON-2A (3BHE004059R0001) introduced revised firmware compatibility and improved EMC filtering, making it the dominant replacement unit for DCS 400/500 installations. Subsequent revisions addressed IGBT gate driver compatibility and expanded the operating temperature range for high-ambient environments. The SDCS-CON-3 and SDCS-CON-4 variants introduced DDCS (Distributed Drive Control System) fiber-optic communication, enabling integration with ABB's AC800M and Advant OCS control platforms. As of 2026, the SDCS series is in the mature/end-of-life phase. ABB has transitioned new projects to the DCS880 platform. However, the installed base of SDCS-based drives remains extensive, and ABB's official spare parts availability for early SDCS variants is increasingly constrained, making third-party MRO sourcing essential for plant continuity.

SDCS Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly deployed modules within the ABB SDCS series. Each entry reflects the module's primary functional role within the drive system.

SDCS-CON-2A (3BHE004059R0001): Main control board for DCS 400/500; armature current and speed regulation.
SDCS-CON-2 (3BSE003827R1): Earlier revision control board; compatible with DCS 500B base drives.
SDCS-CON-1 (3BSE003825R1): First-generation SDCS control board; analog speed reference input.
SDCS-CON-3 (3BSE012489R1): Enhanced control board with DDCS fiber-optic port for fieldbus integration.
SDCS-CON-4 (3BSE014227R1): High-performance control board; supports encoder and resolver feedback simultaneously.
SDCS-IOB-1 (3BSE003832R1): I/O expansion board; 8 DI, 4 DO, 4 AI, 2 AO for auxiliary control signals.
SDCS-IOB-2 (3BSE003833R1): Extended I/O board; adds relay outputs and additional analog channels.
SDCS-IOB-3 (3BSE014228R1): High-density I/O board; 16 DI, 8 DO for complex interlock wiring.
SDCS-FEX-1 (3BSE003834R1): Field excitation board; controls DC motor field current via thyristor bridge.
SDCS-FEX-2 (3BSE003835R1): Dual-bridge field excitation board; supports reversible field weakening.
SDCS-PIN-11 (3BSE003836R1): Power interface board; interfaces control section to thyristor firing circuits.
SDCS-PIN-21 (3BSE003837R1): Power interface board for larger frame sizes; 6-pulse bridge synchronization.
SDCS-DSL-1 (3BSE003838R1): Drive serial link board; RS-485 Modbus RTU communication adapter.
SDCS-COM-1 (3BSE003839R1): PROFIBUS DP communication adapter; slave mode, 12 Mbit/s.
SDCS-COM-5 (3BSE014229R1): DeviceNet communication adapter; supports explicit and implicit messaging.
SDCS-COM-8 (3BSE014230R1): Ethernet/IP adapter; enables integration with Rockwell and Siemens SCADA systems.
SDCS-MEM-8 (3BSE003840R1): Memory expansion module; stores drive parameter sets and fault logs.
SDCS-PSU-1 (3BSE003841R1): Internal 24 VDC power supply board; feeds control electronics from AC mains.
SDCS-PSU-2 (3BSE014231R1): Redundant power supply board; hot-swap capable for critical process applications.