ABB 3HAC028179-001 DSQC668 Servo Computer for IRC5C

Servo Computer for ABB IRC5C Robot Controller

Specifications

Industrial Applications

• Servo / motion-computing tasks inside ABB IRC5C (1st generation) robot controller cabinets.
• Replacement of a failed, faulting or intermittently communicating DSQC668 servo computer in an IRC5C cabinet.
• Preventive maintenance where controller computer boards are inspected and renewed on a schedule.
• Used wherever ABB specifies the DSQC668 servo computer (article 3HAC028179-001) for the IRC5C controller.

Design Purpose

An IRC5C controller must turn the robot program into precisely timed servo motion. The DSQC668 servo computer is the defined ABB board that carries the servo / motion-computing tasks within the cabinet, working together with the controller's main computer and drive modules. Mounted in the IRC5C rack, it is a defined ABB computer board specified so the controller's motion performance stays within the original design margins.

Because this board is defined by its article number and the controller design version it supports, it is a fitment-specific spare, not a generic control board. The correct part is tied to the exact board called out in the controller documentation, so it must be matched by article number and design version rather than by a generic "servo computer" description. This is a confirmed-fitment spare, verified against the controller's parts list, not a universal board. Note it is distinct from the IRC5 axis computer (DSQC601) and main computers (DSQC639 / DSQC1018) and is not a substitute for those boards.

Common Failure Modes

• Boot or communication failure (board not recognized by the controller).
• Intermittent servo faults / lost synchronization from degraded components or poor contact.
• Overheating or capacitor degradation from age and duty cycle.
• ESD or physical damage from improper handling / non-antistatic storage.
• Connector / backplane contact corrosion or looseness.
• Wrong board fitted (article number / design-version mismatch) causing no-go or faults.

Why Choose Us

• Genuine ABB 3HAC028179-001 DSQC668 servo computer — the defined IRC5C controller board, not a generic substitute.
• Fitment confirmation: we verify the board article number and IRC5C design version from your controller documentation so you receive the correct part.
• Condition confirmed before ordering (new original or used original); quotation-based supply with no stock or dispatch-time promises.
• Backed by the IRC5 controller spares we supply across the ABB robot range, including the related main-computer and axis-computer boards.

Related Products

• 3HAC12815-1 — ABB DSQC601 axis computer (IRC5 controller family). Different board from the DSQC668; not interchangeable — fitment confirmed per article number.
• 3HAC050363-001 — ABB DSQC1018 main computer (IRC5 controller family). Confirm which board your cabinet calls out before ordering.
• 3HAC025097-001 — ABB DSQC639 main computer (IRC5 cabinet, same controller family).
• Not sure which IRC5 controller board your unit needs? Send the controller type / existing board article number and we confirm the correct spare — including whether 3HAC028179-001 is the right servo computer for your unit.