ABB DSQC626A 3HAC026289-001 Migration-Ready Servo PSU

Overview

ABB DSQC626A 3HAC026289-001 Migration-Ready Servo PSU for Legacy IRC5 Control Systems

The ABB DSQC626A (part number 3HAC026289-001) is a servo power supply unit engineered for IRC5 drive cabinet installations. As ABB’s industrial robot control platforms age into end-of-life cycles, the DSQC626A has become a critical migration component for facilities transitioning from legacy IRC5 configurations to modernized or hybrid control architectures. Whether you are replacing a failed unit in a live production line or pre-staging spare inventory for a planned retrofit, this module delivers the electrical performance and form-factor compatibility required for seamless integration without cabinet redesign.

Each unit supplied by KNMKS is sourced from verified industrial channels, subjected to functional power-on testing, and backed by a support terms confirmed by quotation. Stock is maintained across regional distribution hubs to support urgent replacement timelines and minimize unplanned downtime in automotive, foundry, food processing, and general manufacturing environments.

Migration Compatibility Table

Retrofit Planning for Existing Automation Systems

A successful IRC5 servo PSU replacement requires more than a part swap — it demands a structured retrofit plan that accounts for the full control chain. When the DSQC626A is being installed as part of a broader drive cabinet upgrade, engineers should simultaneously audit the DSQC662 axis computer board and the DSQC608 power distribution unit, as these components share the same backplane and are subject to comparable wear cycles in high-duty-cycle robot cells.

For facilities running multi-robot cells under a single IRC5 MultiMove controller, the DSQC378B I/O module and associated DSQC652 digital I/O boards must be verified for signal integrity before and after the PSU replacement. Signal isolation failures at the I/O layer are a common source of post-retrofit faults that are misattributed to the power supply itself. Where legacy wiring harnesses are retained, inspect terminal block torque values and verify that the 3HAC025062-003 cable assembly connecting the drive unit to the controller cabinet is free of insulation degradation.

HMI continuity is another critical planning element. If the facility operates FlexPendant units (3HAC028357-001 or equivalent) tethered to the IRC5 controller, confirm that the teach pendant communication link remains stable during the PSU hot-swap window. In some configurations, a controller restart is required after PSU replacement, which will temporarily interrupt HMI availability — this should be scheduled within the planned maintenance window and communicated to the production floor in advance.

For systems where the IRC5 cabinet communicates upstream via PROFIBUS DP or DeviceNet to a Siemens S7 or Allen-Bradley ControlLogix PLC, verify that the fieldbus master retains its node address table and does not issue a fault on loss of the robot controller during the swap interval. Pre-staging a DSQC679 main computer board as a cold spare alongside the DSQC626A is recommended for aging IRC5 installations where multiple boards are approaching end-of-service life simultaneously.

Downtime Control During System Migration

Minimizing production interruption during an IRC5 servo PSU replacement begins with pre-migration preparation. Before powering down the cabinet, back up the complete robot system configuration using RobotStudio — including module files, RAPID program logic, tool data, work object definitions, and safety configuration parameters. Store the backup on an external medium independent of the controller’s internal memory.

During the physical swap, follow ABB’s ESD handling procedures for the DSQC626A to prevent electrostatic damage to the board’s power regulation circuitry. Label all cable connections before disconnection and photograph the terminal block layout for reference during reassembly. If the legacy unit has been in service for more than five years, inspect the backplane connector pins for oxidation and clean with appropriate contact spray before seating the replacement module.

After installation, restore the system backup and perform a controlled power-up sequence: verify DC bus voltage stabilization before enabling servo drives, confirm axis brake release signals, and run a low-speed jog cycle on all axes before returning the robot to automatic mode. This sequence protects the original program logic, maintains field control continuity, and reduces the risk of a secondary fault during the first production cycle post-retrofit. Total planned downtime for a single-robot IRC5 PSU swap, when properly prepared, can typically be contained within a two- to four-hour maintenance window.

Retrofit Support FAQ

Q: Is the DSQC626A a direct drop-in replacement for the DSQC609 in an existing IRC5 cabinet?
A: In most IRC5 configurations, yes — the DSQC626A is the designated replacement for earlier IRC5 servo PSU variants including the DSQC609. However, confirm the cabinet revision and RobotWare version before installation, as some early IRC5 builds may require a firmware update to recognize the replacement unit correctly.

Q: What commissioning steps are required after installing the DSQC626A?
A: After physical installation, restore the system backup via RobotStudio, verify axis parameter mapping, confirm drive configuration, and perform a low-speed jog test on all axes. Check that the FlexPendant communication link is stable and that all I/O signals are responding correctly before returning to automatic production mode.

Q: Does KNMKS provide pre-shipment testing and support terms coverage?
A: Yes. Every DSQC626A unit undergoes a full functional power-on test prior to shipment. All units are covered by a support terms confirmed by quotation from the date of shipment. Replacement or repair support is available through [email protected] for any unit that fails within the confirmed support period.

Q: What is the typical lead time and stock availability?
A: KNMKS maintains ready stock of the DSQC626A across regional distribution hubs. Standard orders ship within 1–3 business days. For urgent replacement requirements or bulk procurement for spare parts programs, contact [email protected] or call +86 18359268345 to confirm current inventory levels and expedited shipping options.

© 2026 KNMKS. All rights reserved.
Original Source: https://knmks.com
Contact: [email protected] | +86 18359268345

Product Identification

Brand / Ecosystem

ABB
ABB

Model / Series

IRB660 3HAC058803-001 3HAC025062-003 DSQC378B 3HNE00421-1 IRC5 DSQC626A3HAC026289-001
IRC5 Series

Product Family

Power Supplies

Availability Status

Available on request after model and quantity confirmation

Inquiry Type

B2B RFQ, replacement inquiry and project spare-part request

Pre-Quote Check

Exact SKU, brand, series, quantity, nameplate photos and destination country are checked before quotation

Specification & Inquiry Focus

Power range

DIN rail and switching power supplies

Common needs

Voltage, current and mounting style

Project support

Control cabinet and panel-builder inquiries

Inquiry Support

• 24VDC and cabinet power selection support
• Stable power support for PLC and HMI systems
• Batch inquiry support for panel builders

What to Send Us

• Brand and exact model number: ABB IRB660 3HAC058803-001 3HAC025062-003 DSQC378B 3HNE00421-1 IRC5 DSQC626A3HAC026289-001
• Quantity and required delivery time
• Application, replacement requirement or nameplate photo
• Destination country and shipping preference