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SDCS-FEX-1

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The ABB SDCS-FEX-1 is an internal single-phase diode field exciter board for DCS 500 converters, delivering stable DC excitation with adjustable current via an external resistor.
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Technical specifications for SDCS-FEX-1

  • Manufacturer:
    ABB
  • Part Number:
    SDCS-FEX-1
  • Product Family:
    ABB Drives
  • AC input voltage:
    110 V -15%...500 V +10%
  • max. DC output current:
    6 A; IF rated
  • DC output curr. monitoring:
    20 mA...6 A
  • Power loss at IF rated:
    ≤10 W
  • AC Isolating voltage:
    600 V
  • Terminals X1: Cross sectional area:
    2,5 mm²
  • Weight:
    0.1 kg
  • Estimated shipping dimensions:
    8.3x4.4x13.3cm
  • Tariff Code:
    8537101190
  • Country of origin:
    Sweden
  • Place of shipment:
    Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.
Description
The ABB SDCS-FEX-1 is an integrated single-phase diode field exciter board specifically engineered for ABB DCS 500 converter systems, functioning as a reliable internal solution to deliver DC excitation for the converter’s field windings. As a passive diode rectifier, its core role is to convert single-phase AC input power into stable DC output, with the DC output voltage fixed at 0.9 times the AC line voltage—field current is determined by this output voltage and the field winding resistance, and can be slightly adjusted by adding an external series resistor to meet application-specific requirements. The board also incorporates DC output current monitoring (ranging from 20mA to 6A) to track excitation levels and safeguard the field winding against abnormal current conditions.

Key electrical parameters include a single-phase AC input voltage range of 110V (-15%) to 500V (+10%), a maximum DC output current of 6A (rated IF), and a power loss of ≤10W at rated field current, ensuring energy efficiency during operation. It features an AC isolation voltage rating of 600V, providing robust electrical separation between input/output circuits and other converter components to prevent interference and enhance safety. Terminal X1 is designed to accept wiring with a 2.5mm² cross-sectional area, aligning with standard industrial wiring practices. Configuration-wise, the SDCS-FEX-1 is exclusively compatible with ABB DCS 500 armature converter modules (as part of the system’s integrated field supply option) and requires seamless integration with the SDCS-POW-1 electronic power supply and SDCS-CON-2 control board for full functionality.

Installation requires mechanical mounting of the board beside the SDCS-POW-1 inside the armature converter module, with electrical connection to the SDCS-CON-2 via a flat cable at terminal X14—following ABB’s DCS 500 system installation guidelines to ensure proper alignment and signal integrity. Safety is further reinforced by the 600V isolation rating and current monitoring capabilities, while the board adheres to industrial environmental standards for DCS 500 auxiliary components, operating reliably in typical industrial temperature ranges and non-condensing humidity conditions (consistent with ABB’s specifications for converter-related electronic boards). Its passive design minimizes maintenance needs and ensures long-term reliability, making it a cost-effective choice for applications requiring straightforward, fixed-field excitation.
Alternative Names
SDCS-FEX-I SDCSFEX1 SDCSFEXI SDCS FEX-01 SDCS FEX1 SDCS-FEX 1
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
What AC input voltage range does it support?
110 V -15% to 500 V +10% single-phase.
What is the maximum DC output current?
6 A (IF rated).
How can the DC output current be monitored?
The current can be monitored from 20 mA to 6 A.
What is the power loss at rated current?
≤10 W.
What is the AC isolation voltage?
600 V.
How is the board electrically connected?
Via a flat cable to SDCS-CON-2 using terminal X14, with terminal X1 supporting 2.5 mm² cross-sectional area.

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