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      ABB SDCS-FEX-2A
      ABB SDCS-FEX-2A

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      Internal digital field exciter board

      SDCS-FEX-2A

      Spare Part Number

      PN3ADT311500R0001

      Product Information:

      This internal field exciter combines a half-controlled power section with microprocessor-based control for ABB DCS converter modules. It accepts a single-phase 110 to 500 V AC input and regulates motor-field current across selectable ranges up to 16 A. Installation is inside the converter beside the SDCS-POW-1 supply, with control and feedback exchanged through the X14 connection.

      Product image is representative; revision or series may vary. Contact us to request a specific version.
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      • One-year warranty
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        • PRODUCT OVERVIEW

          What is this product?

          ABB SDCS-FEX-2A, article 3ADT311500R0001, is an internal field exciter for specified DCS converter modules. Its half-controlled bridge and microprocessor control accept a single-phase 110 to 500 V AC supply and regulate field current from 0.3 A up to 8 or 16 A according to converter size. The board mounts beside SDCS-POW-1 and exchanges supply, control and actual-current information through the documented X14 and X1 connections.

          Official source

          ABB DCS technical data document 3ADW000165R0201, section 8.2, provides the electrical data and converter-size restrictions for SDCS-FEX-2 / FEX-2A.
        • APPLICATIONS

          Where it may be used

          Use this field exciter only in the documented DCS converter arrangement. Confirm converter frame, field-current range, X14 control cable and X1 field circuit before energizing.

          Internal Field Supply

          Provides the controlled DC field current for a matched converter and motor field circuit.

          C1–C2 Converter Service

          Restores the specified internal exciter function in documented C1 and C2 converter modules.

          A5 Frame Replacement

          Supports the documented A5 installation when article identity and wiring are verified.

          Field-Weakening Control

          Maintains regulated field current where the motor configuration requires verified field weakening.
      Technical specifications for

      SDCS-FEX-2A

      0 TECHNICAL PARAMETERS
      • Manufacturer:
        ABB
      • Product Category:
        DC Drives
      • Spare Part Number:
        3ADT311500R0001
      • Product Type:
        Internal field exciter board
      • Power Circuit:
        Half-controlled bridge
      • Control Method:
        Fully digital microprocessor control
      • AC Input Voltage:
        110 V -15% to 500 V +10%, single phase
      • AC Isolation Voltage:
        600 V
      • Frequency:
        Same as DCS converter module
      • DC Output Current:
        0.3 to 8 A for 25 to 75 A converters; 0.3 to 16 A for 100 to 2000 A converters
      • Selectable Current Limits:
        3, 5, 7, 9, 11, 13, 15 or 17 A
      • Power Loss at Rated Field Current:
        40 W maximum
      • Terminal X1 Conductor Area:
        4 mm²
      • Mounting Position:
        Inside converter beside SDCS-POW-1
      • Documented Converter Sizes:
        C1, C2 and A5; not A6, A7 or C4
      • Stock Availability:
        4
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      • 06

        Verify and dispatch

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      BUYER INFORMATION

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      • 01

        Factory Sealed

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      • 02

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      • 03

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        New and current product sourced through the manufacturer or authorized supply channel when expressly confirmed in the quotation.

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      Alternative Names

      SDCS-FEX-2A SDCS FEX 2A FEX-2A 3ADT311500R0001

      Information

      Overview Manuals Field Exciter Data Converter Compatibility Commissioning Notes

      Features:

      • Digitally controlled internal field exciter with a half-controlled bridge power section.
      • Single-phase 110 to 500 V AC input with selectable field-current ranges up to 16 A.
      • Specified for C1, C2 and A5 DCS converter modules with documented X14 and X1 connections.

      SDCS-FEX-2A is selected by its complete article number, converter size and motor field-current requirement. ABB technical data must be followed for mounting, insulation and current-range setup.

      Official source: ABB DCS technical data document 3ADW000165R0201, section 8.2, provides the electrical data and converter-size restrictions for SDCS-FEX-2 / FEX-2A.
      SDCS-FEX-2A official product documentation and verified Moore Automated resources Manuals / Datasheets / Links Important Notice: Other accessories, manuals, cables, calibration data, software, licenses and related items are not included unless listed in the stock item description. All prices are shown in USD.

      The power section uses two diode/thyristor modules in a half-controlled bridge. ABB specifies 600 V AC isolation, a maximum 40 W loss at rated field current and selectable current limits from 3 to 17 A.

      Internal mounting is documented for converter sizes C1, C2 and A5. A6, A7 and C4 require a different exciter arrangement, so the frame designation must be verified before replacement.

      Inspect X14 and X1 connections, verify motor field polarity and current-range selection, then confirm current feedback and firing control before returning the drive to service.

      Technical notes

      ABB identifies SDCS-FEX-2A as an internal field exciter built from a half-controlled power section and a digitally controlled firing circuit. The documented input is single-phase 110 V -15% to 500 V +10%, the isolation voltage is 600 V and the regulated field-current range extends from 0.3 A to 16 A depending on converter size. Before replacement, match article 3ADT311500R0001, converter frame, X14 control connection, X1 field wiring and the installed current-range configuration.

      Exact Field-Exciter Verification

      Confirm the complete SDCS-FEX-2A and 3ADT311500R0001 identity, converter frame size, X14 ribbon-cable position, X1 field terminals and current-range configuration. If any label or suffix is unclear, send a clear nameplate and installed-board photograph before quotation.

      Quotation Details for SDCS-FEX-2A

      Provide the required quantity, full article number, board and converter nameplate photos, converter type, motor field-current data, destination country and required delivery date. Moore Automated uses these details to match the exact exciter and quote the verified supply scope.

      Customs & shipping dimensions / weight

      • Packed shipping dimensions
        Confirmed after final packing
        ABB board layout shows approximately 240 × 90 mm; final packed size is confirmed after packing.
      • Packed shipping weight
        Confirmed after final packing
        Actual item weight is confirmed before shipment.
      • HS / customs code
        Not officially confirmed
        Verify with destination customs before shipment.
      • Country of origin
        Not officially confirmed
        Verify from the supplied item nameplate or certificate of origin.
      • Ships from
        Xiamen, Fujian, China
        Dispatch location is confirmed in the written quotation.
      • Customs documents
        Confirmed for the destination
        Available document scope is stated in the written quotation.
      PRODUCT & ORDER FAQS

      Questions buyers ask about SDCS-FEX-2A

      • How is the exact SDCS-FEX-2A board identified?

        Verify the SDCS-FEX-2A marking together with ABB article 3ADT311500R0001 and compare the installed connector and converter frame before ordering.

      • Which converter sizes are documented for this field exciter?

        ABB documents internal use with DCS converter module sizes C1, C2 and A5; it is not the specified internal exciter for A6, A7 or C4.

      • What AC supply range does SDCS-FEX-2A accept?

        The official technical data specifies a single-phase input from 110 V -15% to 500 V +10%, with frequency following the converter module.

      • What must be checked during installation?

        Confirm the mounting position beside SDCS-POW-1, the X14 flat-cable connection, X1 field wiring, insulation condition and the converter current class.

      • Can Moore Automated confirm current stock?

        Yes. Availability for 3ADT311500R0001 is confirmed in writing against the requested quantity and required condition before quotation.

      • What warranty applies to the supplied board?

        Moore Automated provides a one-year warranty; the written quotation states the supplied condition, inspection scope and warranty start date.

      • How quickly can this ABB field exciter ship?

        The listing is set for three-day fast dispatch when stock and inspection are confirmed; destination transit time is quoted separately.

      • Which official document supports these specifications?

        The technical values are taken from ABB DCS technical data document 3ADW000165R0201, section 8.2 for SDCS-FEX-2 and FEX-2A.
      All FAQ
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            Over 20 years of experience in industrial automation and hard-to-source legacy parts.

          • Product Lifecycle Stage

            Classic / Legacy product

            Moore Automated supplies high-quality ABB SDCS-FEX-2A replacement boards and DCS drive spares. The complete converter and motor-field configuration is verified before supply to reduce commissioning risk and production downtime.

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          Moore Disclaimer: Moore Automated's sales automation equipment and related solutions are intended for industrial automation and business operational efficiency improvement purposes only. Product information, technical parameters, and application cases are for reference only and do not constitute an absolute guarantee of performance for any specific industry, scenario, or final application. Actual equipment performance may vary depending on factors such as the usage environment, system integration method, and maintenance conditions. Users should confirm compatibility and safety based on professional technical assessments. Moore Automated assumes no liability for any direct or indirect losses caused by improper use, modification, or failure to operate according to specifications, to the extent permitted by law.

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