ABB SDCS-FEX-2 (3ADT306300R1) Field Excitation Control Unit | Replacement, Equivalent & Selection Guide
The ABB SDCS-FEX-2 (part number 3ADT306300R1) is a dedicated field excitation control board designed for ABB DCS500 series DC drives. It regulates the motor field current with high precision, ensuring stable torque and speed performance in demanding industrial applications. This page provides full technical specifications, compatible replacement options, and a structured selection guide to help engineers and procurement teams make the right sourcing decision.
Technical Specifications
- Manufacturer: ABB
- Part Number / SKU: SDCS-FEX-2 / 3ADT306300R1
- Series: DCS500 / SDCS
- Function: Field Excitation Control Unit for DC Drives
- Rated Field Supply Voltage: Up to 500 V AC
- Field Current Output: Adjustable via internal parameters
- Communication Interface: Integrated with DCS500 main control board
- Mounting: Direct plug-in to DCS500 drive chassis
- Operating Temperature: 0 °C to +55 °C
- Weight: Approx. 1,400 g
- Compliance: CE marked; meets IEC/EN 61800 series standards
Compatible Replacement & Equivalent Models
The following models are functionally equivalent or direct replacements for the SDCS-FEX-2. Always verify firmware version and drive series compatibility before substitution.
- ABB SDCS-FEX-1 – Earlier revision; compatible with DCS400/DCS500 (verify current rating)
- ABB SDCS-FEX-2A – Revised variant with enhanced thermal protection
- ABB 3ADT306300R0001 – Alternative part number format for the same unit
- Third-party equivalents: Consult Konmask technical team for vetted aftermarket options with warranty
Note: Cross-referencing by part number alone is insufficient. Always confirm drive series, firmware, and field voltage rating.
Why Choose the Original SDCS-FEX-2
- Factory-calibrated field current regulation for precise motor control
- Guaranteed compatibility with ABB DCS500 drive firmware
- Full ABB traceability and quality documentation available
- Reduces commissioning time versus aftermarket alternatives
- Long-term spare parts availability through authorized channels
Typical Applications
- Paper & pulp mill winder and unwinder drives
- Steel rolling mill main drive systems
- Marine propulsion and winch control
- Mining hoist and conveyor DC drive systems
- Crane and overhead hoist applications
- Large pump and fan variable-speed DC drives
System Compatibility
- Drive Series: ABB DCS500 (DCS501, DCS502, DCS503, DCS504)
- Control Board: SDCS-CON-2, SDCS-CON-3, SDCS-CON-4
- Power Board: SDCS-POW-1, SDCS-POW-4
- I/O Boards: SDCS-IOB-1, SDCS-IOB-2, SDCS-IOB-3
- Not compatible with: ACS series AC drives; DCS400 without hardware modification
Selection Guide
Use the criteria below to confirm the SDCS-FEX-2 is the correct choice for your application:
- Step 1 – Confirm drive series: Verify your drive is DCS500 series (check nameplate or documentation)
- Step 2 – Check field voltage: Confirm AC field supply voltage ≤ 500 V
- Step 3 – Verify firmware: SDCS-FEX-2 requires DCS500 firmware v5.x or later
- Step 4 – Inspect connector type: Ensure chassis connector matches SDCS-FEX-2 pinout
- Step 5 – Consider revision: If enhanced thermal protection is needed, evaluate SDCS-FEX-2A
- Need help? Contact our technical team with your drive nameplate data for a free compatibility check.
Quality Assurance & Sourcing
- All units sourced from verified ABB authorized distributors or OEM-surplus channels
- Each unit undergoes incoming inspection: visual, functional, and label verification
- Original packaging and documentation preserved where available
- Warranty: 12 months from shipment date
- Certificates of conformity and test reports available on request
- Export compliance: HS Code 8537.10; EAR99 classification (verify for your jurisdiction)
How to Order
- SKU: SDCS-FEX-2-3ADT306300R1
- Add to cart directly, or contact us for bulk / project pricing
- Lead time: In-stock units ship within 1–3 business days; ex-stock orders within 7–14 days
- Payment: T/T, PayPal, credit card accepted
- Shipping: DHL / FedEx / UPS worldwide; sea freight available for large orders
- For urgent requirements, email support@konmask.com with your project timeline
Replacement & Compatibility FAQ
Q: Can SDCS-FEX-1 replace SDCS-FEX-2?
A: In many DCS500 applications yes, but the FEX-2 offers improved field current accuracy. Confirm with your drive documentation.
Q: Is the SDCS-FEX-2 compatible with DCS400 drives?
A: Not directly. DCS400 uses a different field excitation architecture. Contact us for DCS400-specific options.
Q: Do you supply new or refurbished units?
A: We supply both. All refurbished units are tested and carry a 12-month warranty. Condition is clearly stated on each listing.
Q: Can I get a datasheet or wiring diagram?
A: Yes. Contact support@konmask.com with your order or inquiry reference and we will provide available documentation.
Q: What is the lead time for out-of-stock units?
A: Typically 7–21 business days depending on sourcing channel. We will confirm before invoicing.
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