ABB SDCS-CON Modules

Technical Dossier

Product Details And Specifications

ABB SDCS-CON Series: Comprehensive Module Range and Technical Overview

The ABB SDCS-CON series represents the core control board platform for ABB's DCS400 and DCS800 family of DC drive systems. These modules are deployed across global heavy industry — including petrochemical refineries, nuclear auxiliary systems, pulp and paper mills, steel rolling mills, and offshore platforms — where precise DC motor speed and torque control is a process-critical requirement. The SDCS-CON architecture integrates the drive's closed-loop regulation, field excitation control, I/O interfacing, and fieldbus communication into a single compact board, making it the central intelligence of the drive cabinet. Installed base spans hundreds of thousands of units across Europe, Asia, and the Americas, with many sites still operating first-generation hardware under long-term maintenance contracts.

The Evolution of SDCS-CON Architecture

The SDCS-CON lineage traces to ABB's transition from the analog-controlled DCREG and MENTOR platforms toward fully digital DC drive control in the early 1990s. The original SDCS-CON-1 introduced microprocessor-based speed regulation with serial parameter access, replacing potentiometer-based tuning. The SDCS-CON-2 (part number 3ADT220090R0001) extended this with expanded I/O capacity and support for the SDCS-FEX field excitation modules, becoming the dominant variant in DCS400 installations through the late 1990s and 2000s.

The SDCS-CON-3 (3ADT313900R0001) introduced a revised backplane bus architecture compatible with the DCS800 platform, adding support for DDCS fiber-optic communication and the SDCS-AMC application module. The SDCS-CON-4 (3ADT313900R1001) is the current production revision of the CON-3, incorporating revised FPGA firmware, improved EMC filtering on the analog input stage, and compatibility with the SDCS-AMC-DC application controller. As of 2024, the DCS800 platform has entered the mature/end-of-active-development phase; ABB continues to supply spare parts and firmware support but no new hardware revisions are planned. Sites operating SDCS-CON-2 hardware are advised to maintain a buffer stock of control boards, as cross-compatibility with CON-3/CON-4 requires parameter migration and hardware adapter verification.

SDCS-CON Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly stocked modules within the SDCS-CON ecosystem and associated DCS800 drive platform. Each entry reflects a discrete hardware function.

Control Boards (CON Series)

• 3ADT220090R0001 — SDCS-CON-2: Main control board for DCS400; analog/digital I/O, serial comms, speed regulation core.
• 3ADT313900R0001 — SDCS-CON-3: DCS800 control board; DDCS fiber port, expanded parameter set, AMC slot.
• 3ADT313900R1001 — SDCS-CON-4: Revised DCS800 control board; updated FPGA, improved EMC, AMC-DC compatible.

Application Controller Modules (AMC Series)

• 3ADT309600R0001 — SDCS-AMC-DC: Application/motion controller add-on for DCS800; DriveAP programming environment.
• 3ADT220100R0001 — SDCS-AMC: Earlier application module for DCS800 CON-3; supports function block programming.

Field Excitation Modules (FEX Series)

• 3ADT220080R0001 — SDCS-FEX-2: Field excitation board for DCS400/DCS800; single-phase thyristor bridge, up to 16 A field current.
• 3ADT220080R0002 — SDCS-FEX-2A: Enhanced field excitation; extended current range, improved thermal management.
• 3ADT309500R0001 — SDCS-FEX-4: High-current field excitation module for large DC motors; up to 30 A continuous.

I/O Extension Modules (IOE Series)

• 3ADT220070R0001 — SDCS-IOE-1: I/O extension board; adds 8 DI, 4 DO, 4 AI, 2 AO to DCS800 base configuration.
• 3ADT220070R0002 — SDCS-IOE-2: Extended I/O module; relay outputs, encoder interface, thermistor input.

Communication Adapter Modules

• 3AFE68315735 — RDCO-03: DDCS fiber-optic communication module; connects DCS800 to NDBU branching unit or master controller.
• 3AFE68315735 — RDCO-04: DDCS module with extended fiber port count for multi-drive configurations.
• 3AFE68836059 — RPBA-01: PROFIBUS-DP adapter for DCS800; cyclic and acyclic data exchange, GSD file supported.
• 3AFE68836060 — RCAN-01: CANopen adapter for DCS800; DS402 drive profile, 1 Mbit/s max.
• 3AFE68836061 — REPL-01: EtherNet/IP and Modbus TCP adapter for DCS800; dual-port switch topology.

Power Supply & Auxiliary Boards

• 3ADT220060R0001 — SDCS-PIN-205: Power interface board for DCS800 size D5; thyristor gate drive, snubber circuits, current feedback.
• 3ADT220060R0002 — SDCS-PIN-48: Power interface board for DCS800 size D4; compact thyristor firing board.
• 3ADT220050R0001 — SDCS-DSL-4: Diagnostic and signal level board; analog measurement conditioning for armature current and voltage feedback.

Sourcing Hard-to-Find & Obsolete SDCS-CON Parts

Quality Control for the SDCS-CON Range

Each SDCS-CON board processed by DriveKNMS undergoes a structured test protocol designed around the specific failure modes of this platform. Known failure points include: FPGA configuration loss due to battery-backed SRAM degradation (CON-3/CON-4), analog input op-amp drift on the speed feedback channel (CON-2), and DDCS fiber transceiver degradation causing intermittent communication faults. The test sequence includes: (1) visual inspection of solder joints, capacitor condition, and connector integrity; (2) powered bench test using a DCS800 drive frame with a resistive load, verifying all I/O channels against ABB's hardware test specification; (3) DDCS loopback test for CON-3/CON-4 units; (4) 24-hour burn-in at elevated ambient temperature; (5) final parameter load and firmware version confirmation. Test records are retained and available upon request. Units that fail any stage are either repaired to component level or quarantined — no board is dispatched without a passing test record.

© 2026 DriveKNMS. All trademarks belong to their respective owners. Specifications are for reference only and subject to change without notice. Verify all parameters against official documentation before installation.