ABB DSQC626 3HAC026289-001 Migration-Ready Power Supply for IRC5

Overview

ABB DSQC626 3HAC026289-001 Migration-Ready Power Supply for IRC5 Legacy Control Systems

The ABB DSQC626 (part number 3HAC026289-001) is a critical power supply module designed for the IRC5 robot controller platform. As industrial facilities accelerate legacy system migrations and aging automation lines approach end-of-support, the DSQC626 remains one of the most requested replacement components for IRC5 single-cabinet and dual-cabinet configurations. Whether you are restoring a production line after an unplanned failure or executing a planned retrofit of an S4C+ to IRC5 upgrade path, this module provides the regulated DC power backbone that the IRC5 drive system, computer unit, and I/O network depend on.

The DSQC626 supplies the internal 24 VDC and auxiliary voltages required by the IRC5 main computer (typically paired with the DSQC639 or DSQC645 computer unit), the axis computer boards, and the distributed I/O modules connected via DeviceNet. During a retrofit or replacement, engineers must verify the incoming AC supply voltage range (200–600 VAC, 50/60 Hz), confirm that the existing cabinet wiring harness connector pinout matches the DSQC626 terminal layout, and check that the backplane slot assignment in the IRC5 cabinet has not been modified by a previous field repair. Incorrect slot positioning can cause the system to fail its power-on self-test and prevent the FlexPendant from establishing communication with the main computer.

When integrating the DSQC626 into an existing IRC5 cabinet during a migration from an older S4 or S4C+ controller, the most common compatibility checkpoints include confirming the firmware revision of the IRC5 system software (RobotWare 5.x or 6.x), verifying that the DSQC608 I/O module addresses on the DeviceNet bus do not conflict with the replacement unit’s default configuration, and ensuring that the DSQC662 fieldbus adapter or DSQC688 PROFINET device module is still correctly mapped in the robot configuration files. HMI screens built on the FlexPendant or on an external SCADA panel that reference specific I/O signal names must be validated after the power supply swap to confirm that no signal aliasing has occurred due to the reboot sequence.

For facilities running multi-robot cells, the DSQC626 replacement procedure should be coordinated with the cell PLC — often a Siemens S7-300 or Allen-Bradley ControlLogix — to ensure that the robot’s safety interlock signals (emergency stop chain, safeguard input, and automatic stop) are correctly re-established after the module is seated and the cabinet is powered up. The IRC5 safety board monitors these inputs during the startup sequence, and any open circuit in the safety chain will prevent the system from transitioning from Motors Off to Motors On state.

Migration Compatibility Table

Retrofit Planning for Existing Automation Systems

A successful DSQC626 replacement begins well before the module arrives on-site. Maintenance engineers should pull the IRC5 cabinet’s electrical drawings to confirm the exact harness routing from the power supply bay to the drive unit and to the DSQC609 or DSQC611 panel board. In multi-axis systems, the power sequencing between the DSQC626 and the axis computers must follow the IRC5 startup order defined in the system parameters; deviating from this sequence can corrupt the resolver offset data stored in the axis computer’s non-volatile memory.

If the retrofit is part of a broader control cabinet upgrade — for example, replacing an aging S4C+ controller with a refurbished IRC5 unit — the project scope typically also includes replacing the DSQC639 main computer, re-terminating the customer I/O wiring to the new DSQC652 or DSQC662 I/O modules, and updating the robot program backup to a RobotWare 6.x compatible format. The DSQC626 is the power foundation for all of these downstream components, so its installation and verification should be the first step in the commissioning sequence.

For facilities that rely on PROFIBUS or PROFINET communication between the robot and the plant PLC, the DSQC688 PROFINET device module or the DSQC667 PROFIBUS adapter must be re-configured after the power supply replacement to ensure that the GSD/GSDML device description files still match the network topology. Any change in the IRC5 system software version during the retrofit may require a re-import of the device description file into the PLC engineering tool (TIA Portal or RSLogix 5000) to restore the cyclic data exchange.

Signal isolation between the robot’s 24 VDC I/O commons and the plant’s field wiring commons is another area that requires attention during a DSQC626 swap. If the original installation used external signal isolators or relay barriers between the DSQC608 I/O terminals and the field sensors, these isolators must be re-verified for correct polarity and voltage compatibility after the new power supply is energized.

Downtime Control During System Migration

Minimizing unplanned downtime during a DSQC626 replacement requires a structured hot-swap preparation protocol. Before de-energizing the IRC5 cabinet, the robot program and system parameters should be backed up to a USB drive using the FlexPendant backup function or the RobotStudio PC tool. This backup captures the current module configuration, I/O signal definitions, safety configuration, and motion program, ensuring that the system can be restored to its pre-failure state within minutes of the new module being seated.

The physical replacement of the DSQC626 is a tool-free operation in most IRC5 cabinet configurations — the module slides into the power supply bay and is secured by a latch mechanism. However, the cabinet must be fully de-energized and locked out before the module is removed, and the incoming AC supply must be verified as isolated before any internal work begins. After the new module is installed and the cabinet is re-energized, the IRC5 will perform its power-on self-test automatically; the FlexPendant will display the system startup sequence, and any fault codes generated during this sequence should be recorded and cross-referenced against the IRC5 Troubleshooting Manual before the robot is returned to automatic mode.

For production environments where stopping the robot cell for more than 30 minutes is not acceptable, a pre-staged spare DSQC626 held in the maintenance store — verified against the 3HAC026289-001 part number label and pre-tested before storage — is the most effective strategy for controlling mean time to repair. Our stock is pre-shipment tested and available for same-week dispatch, supporting your spare parts lifecycle management program.

Retrofit Support FAQ

Q1: Is the DSQC626 (3HAC026289-001) a direct drop-in replacement for all IRC5 cabinet variants?
The DSQC626 is compatible with the standard IRC5 single-cabinet and dual-cabinet configurations. Before ordering, confirm the cabinet variant (M2004, M2006, or later) and verify the part number label on the existing power supply. Some early IRC5 cabinets used a predecessor module with a different connector layout; cross-referencing the 3HAC026289-001 label against the cabinet’s electrical BOM is the recommended verification step.

Q2: What commissioning steps are required after installing the DSQC626?
After installation, restore the system backup from the FlexPendant or RobotStudio, verify that all I/O signals on the DSQC608 modules are correctly mapped, confirm that the safety chain (emergency stop, safeguard, and automatic stop) is intact, and perform a controlled jog of each axis to verify resolver feedback before returning the robot to automatic mode. If the system was running RobotWare 5.x, confirm that the firmware version on the new module is compatible before applying power.

Q3: Can the DSQC626 be used in a system that has been upgraded from S4C+ to IRC5?
Yes. The DSQC626 is the standard power supply for the IRC5 platform regardless of whether the cabinet is a new build or a field-upgraded unit. During an S4C+ to IRC5 migration, the power supply, main computer (DSQC639/DSQC645), and I/O modules are typically replaced as a set. Ensure that the customer I/O wiring is re-terminated to the new I/O module terminal blocks and that the robot program has been converted to RobotWare 5.x or 6.x format before commissioning.

Q4: What support terms and testing does this unit include?
Every DSQC626 unit shipped by KNMKS is covered by a support terms confirmed by quotation and has been pre-shipment tested to verify output voltage regulation and connector integrity. In-stock units are available for same-week dispatch. For bulk orders or spare parts program inquiries, contact our technical sales team directly.

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

Product Identification

Brand / Ecosystem

ABB
ABB

Model / Series

DSQC626-3HAC026289-001
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 DSQC626-3HAC026289-001
• Quantity and required delivery time
• Application, replacement requirement or nameplate photo
• Destination country and shipping preference