FEX-2A 3ADT311500R0001 ABB Input module

Description

FEX-2A 3ADT311500R0001 ABB Input module

Product Dimensions：

Product Description

The FEX-2A is an internal field exciter module that provides a controlled DC voltage to the motor’s field winding. It is a fundamental component for the DCS500 drive system, converting the AC supply into a regulated DC output. This module is known for its robust construction and its ability to interface directly with the drive’s main control electronics to provide precise, high-speed regulation of the magnetic flux within the motor.

Technical Specifications

Product Advantages

• Optimized Control: Provides highly accurate current regulation, which ensures stable motor operation even during rapid load changes.

• Compact Integration: Its design allows it to be tucked neatly within the drive’s chassis, reducing external wiring and saving panel space.

• Enhanced Protection: Includes built-in monitoring for field loss, which prevents the motor from reaching dangerous overspeed conditions if the field current is interrupted.

• Proven Reliability: As a legacy component of the DCS500 range, it has a long track record of durability in harsh industrial environments.

• Easy Maintenance: The board is designed with accessible test points, making it straightforward for technicians to measure voltages during troubleshooting.

Precautions

• High Voltage Safety: The board handles lethal voltages. Always ensure the main power is disconnected and the DC bus is fully discharged before touching the board.

• Legacy Compatibility: Ensure this board is being used specifically with the DCS500 series. While it looks similar to later “FEX” models, the control interfaces are not always cross-compatible.

• Static Protection: Like all printed circuit boards, the FEX-2A is sensitive to Electrostatic Discharge (ESD). Use a grounded wrist strap when handling the unit.

• Correct Phase Synchronization: Ensure the AC input to the field exciter is correctly synchronized with the drive’s control logic to avoid firing angle errors.

Product Applications

The FEX-2A is commonly found in older but high-performance industrial installations, including:

• Steel Mills: Regulating the field current for motors used in heavy-duty rolling and tensioning applications.

• Crane and Hoist Systems: Providing the necessary torque control for lifting and lowering heavy loads safely.

• Extruders: Managing the motor performance in plastic or rubber extrusion lines where constant torque is required at low speeds.

• Pulp and Paper: Controlling sectional drives in paper machines where precise speed coordination is vital.

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