Product Overview

The ABB 3ADT309600R0002​ is the SDCS-CON-2A control board — the “compute brain” of ABB’s SDCS (Direct Current Control System) drive architecture, most commonly deployed as the main control PCB inside ABB DCS800 DC drives, and also compatible with selected ABB ACS800 AC drives​ and ABB exciter/field-supply systems that share the SDCS rack mechanicals and backplane. The suffix “Without Software” in the product designation is not a defect — it is the defining commercial and engineering decision: the ABB 3ADT309600R0002​ ships as a bare/hardware-only PCBA containing the industrial-grade microprocessor, RAM, Flash memory chips, communication controllers, and power-management circuitry, but no operating system, no firmware, and no application-parameter set are pre-loaded. This makes the 3ADT309600R0002​ fundamentally different from the “firmware-sensitive matched spares” we covered earlier in this ABB series (P3LG, SAY130, PSTX motherboard, Relion 1MRK002133) — those demanded “match the host revision or DOA”; the ABB 3ADT309600R0002​ flips that: one blank hardware SKU serves DCS800, ACS800, and exciter hosts, and you flash the exact firmware + parameter archive from your drive’s project backup during commissioning. No version-mismatch risk, no “wrong stepping” DOA, no need to stock three different R-suffix boards for three drive types.Physically the ABB 3ADT309600R0002​ (SDCS-CON-2A) measures approximately 248 × 83 × 25 mm and weighs 0.41 kg, rack-insert style that slides into the DCS800/ACS800 drive chassis and locks onto the backplane for 24 V DC power (≤15 W drawn from the drive’s auxiliary backplane, same rail that feeds the SDCS-IOB and SDCS-PIN sibling boards) and data exchange with the power-interface and I/O extension cards. Communication side carries CAN (250/500/1000 kbps), RS-485 (Modbus RTU), optional Ethernet/Modbus TCP on select builds, and PROFIBUS DP via adapter/firmware — the three protocols that let the DCS800 talk up to ABB 800xA, Siemens PCS7, Emerson DeltaV, or Rockwell Logix without an external gateway. On-board DI/DO/AI/AO handle the drive-local signals (start/stop, enable, fault reset, field-current feedback, armature-voltage sense, tach/encoder input, relay-alarm outputs). LEDs for Power, Fault, and Communication sit on the faceplate. Origin is Thailand (ABB Group) for current production; the ABB 3ADT309600R0002​ is the direct hardware replacement for the earlier 3ADT309600R0001 (SDCS-CON-2A R0001), sharing the same envelope, pinout, and backplane, so a “R0001 died, R0002 is the catalog substitution” is a clean slot-swap — provided you have the drive’s firmware image and parameter archive ready to load.For maintenance teams running DCS800 DC mains in steel rolling, mine winders, paper-machine DC sections, and ore-grinder drives — places where DC torque control still beats VFD for low-speed high-torque — the ABB 3ADT309600R0002​ is the spare that ends the “which R-suffix fits my DCS800-0050 vs DCS800-4000” debate. One SKU, flash what the drive needs.

Technical Specifications

Main Features and Advantages

Blank-hardware design eliminates firmware-mismatch DOA:​ The single biggest differentiator of the ABB 3ADT309600R0002​ versus every other ABB PCBA we have covered in this series is the “Without Software” intent. P3LG, SAY130, PSTX motherboard, Relion 1MRK002133, 2UBA interface — all of those carried Flash and demanded host-revision matching or the swap failed. The ABB 3ADT309600R0002​ carries the silicon (microprocessor, RAM, Flash chips) but leaves them empty — you load the DCS800- or ACS800-specific firmware and the project parameter archive via ABB’s drive commissioning PC tool (DriveWindow / DCS800 commissioning SW) after installation. The upside: one spare SKU covers DCS800 frame sizes from -0050 up to -4000, covers ACS800-adjacent SDCS racks, covers exciter builds — no “oops, ordered R0002 but my drive needs the PROFIBUS build not the CAN build” because the build is what you flash onto it. For plants with a mixed DCS800/ACS800/exciter fleet, the 3ADT309600R0002​ is the consolidation spare.DCS800/ACS800/Exciter multi-host compatibility:​ The SDCS rack architecture (CON + IOB + PIN boards) is the mechanical/backplane constant; the ABB 3ADT309600R0002​ is the CON (control) slot occupant. DCS800 DC drive uses it for armature-current loop, speed loop, field-exciter loop, and thyristor firing-angle calculation. ACS800 in SDCS-configured builds (older ACS800 cabinets used SDCS-CON-2 variants before the drive-control migrated fully to AMxC/DSU architectures) uses the same board for the AC-vector algorithm and the power-section handshake. ABB exciter/static-field systems reuse the SDCS rack for the field-current regulator. One 3ADT309600R0002​ PCB, three host families — the “Without Software” label is what enables that.Direct slot-replacement for R0001 (3ADT309600R0001):​ The ABB 3ADT309600R0002​ is the catalog successor to the R0001. Same 248×83×25 mm envelope, same guide-rail tabs, same backplane header pinout, same LED positions. A DCS800 cabinet that was commissioned with R0001 and now shows “Control Board Fault” or a dead microprocessor can take a 3ADT309600R0002​ with no mechanical or cabling change — the only added step vs a pre-flashed spare is “load the firmware + parameter archive.” For plants that have been running DCS800 since the mid-2000s, the R0001→R0002 substitution is the standard lifecycle move, and the ABB 3ADT309600R0002​ is the currently-available hardware.Multi-protocol comms without gateway boxes:​ CAN (250/500/1000 kbps), RS-485 Modbus RTU, PROFIBUS DP, and on some builds Ethernet/Modbus TCP are all reachable from the ABB 3ADT309600R0002​ depending on which firmware image you flash. That means a DCS800 in a Siemens PCS7 plant can run PROFIBUS DP up to the PLC; the same 3ADT309600R0002​ hardware in an ABB 800xA plant can run Modbus TCP; in a Rockwell plant, CAN/Modbus RTU. The board doesn’t care — the firmware image you load decides. That flexibility is why “Without Software” is a feature, not a gap.Backplane 24 V DC, ≤15 W, DI/DO/AI/AO on-board:​ The ABB 3ADT309600R0002​ pulls from the DCS800/ACS800 auxiliary backplane (same 24 V DC that feeds SDCS-IOB and SDCS-PIN), draws ≤15 W, and carries the drive-local I/O: start/stop pushbutton dry contacts, enable, field-current analog, armature-voltage analog, tach/encoder, relay-alarm (Run/Fault/Trip). No separate PSU, no separate I/O rack for the drive-local signals — the 3ADT309600R0002​ is the aggregator.LED diagnostics at the faceplate + -25°C to +70°C:​ Power, Fault, Com LEDs let a drive-room technician tell “24 V backplane dead,” “firmware not loaded (Com dark, Power on),” or “CAN/Profibus link lost” without DriveWindow. The -25°C cold-start covers unconditioned drive rooms (mine winder electrical galleries, Arctic ore plants, paper-mill basements), and the +70°C top-end covers a DCS800 cabinet next to a reheating furnace MCC.