ABB DSQC626 3HAC026289-001 Retrofit-Ready Power Supply for IRC5 Control Systems
The ABB DSQC626 (part number 3HAC026289-001) is a factory-grade power supply module engineered for the ABB IRC5 robot controller platform. As production lines age and original spare parts become increasingly scarce, the DSQC626 has become one of the most sought-after retrofit components for facilities operating ABB IRB series industrial robots — including the IRB 1600, IRB 2400, IRB 4400, IRB 6600, and IRB 7600 families. Whether you are executing a planned control cabinet upgrade, recovering from an unplanned module failure, or migrating from an end-of-life IRC4 system to the IRC5 architecture, the DSQC626 provides a verified, drop-in power supply solution that minimises engineering risk and downtime.
Each unit supplied by SMARTNEXMSK is sourced from controlled inventory channels, subjected to pre-shipment functional testing, and backed by a 12-month warranty. We maintain standing stock to support urgent retrofit schedules and can confirm compatibility against your robot serial number and controller cabinet revision before shipment.
Upgrade Compatibility Table
| Parameter | Detail |
|---|---|
| Part Number | DSQC626 / 3HAC026289-001 |
| Compatible Controller | ABB IRC5 Single Cabinet, Dual Cabinet, Panel Mounted Controller |
| Compatible Robot Series | IRB 1600 / 2400 / 4400 / 6600 / 7600 |
| Replaces / Supersedes | DSQC609 (3HAC14265-1) in IRC5 retrofit paths; direct swap for DSQC626 variants |
| Mounting Interface | IRC5 standard backplane slot — no bracket modification required |
| Communication Compatibility | DeviceNet, PROFIBUS-DP, EtherNet/IP (via DSQC651 / DSQC652 fieldbus adapters) |
| Terminal Wiring | 24 VDC logic supply; verify cabinet harness connector P1/P2 pinout before installation |
| Installation Requirement | IRC5 cabinet power-off, ESD precautions, RobotWare 5.x or 6.x compatible |
| Retrofit Recommendation | Replace alongside DSQC662 (I/O module) if cabinet has logged repeated power fault events |
| Commissioning Note | Re-run system diagnostics via FlexPendant after installation; verify axis computer DSQC668 communication |
| Warranty | 12 Months — covers functional defects under normal operating conditions |
Retrofit Planning for Existing Automation Systems
A successful DSQC626 retrofit begins well before the module arrives on-site. Engineers should start by auditing the full IRC5 cabinet bill of materials. In many aging installations, the power supply failure is symptomatic of broader cabinet stress — particularly when the DSQC662 digital I/O module, the DSQC663 analog I/O module, or the DSQC668 axis computer have accumulated operating hours beyond their rated service intervals. Replacing the DSQC626 in isolation without inspecting these adjacent modules risks a repeat failure within months.
For facilities migrating from IRC4 to IRC5 architecture, the retrofit scope typically expands to include the DSQC639 main computer board and the DSQC643 power distribution board, both of which govern how the new power supply integrates with the updated backplane. The DSQC651 DeviceNet fieldbus adapter or the DSQC652 PROFIBUS-DP adapter must also be confirmed compatible with the plant’s existing PLC communication network — commonly a Siemens S7-300 or Allen-Bradley ControlLogix acting as the network master.
Terminal wiring adaptation is another critical checkpoint. The DSQC626 uses a standard IRC5 harness, but older cabinets retrofitted from IRC4 may have non-standard cable routing to the DSQC609 predecessor. Technicians should photograph and document all connector positions — particularly the P1 and P2 power connectors and the X1 signal harness — before removing the original module. This documentation also supports HMI screen reconfiguration: if the facility uses an ABB FlexPendant TP or a third-party SCADA panel linked to the IRC5 via EtherNet/IP, the power module replacement may trigger a controller restart that requires HMI re-synchronisation and alarm history clearance.
For I/O expansion projects running in parallel with the power supply retrofit, the DSQC355A I/O expansion unit and associated DSQC377B relay output modules are commonly installed in the same service window to avoid a second planned shutdown. Coordinating these replacements under a single maintenance event is the most effective way to control total downtime exposure.
Downtime Control During System Migration
Minimising production loss during an IRC5 power supply replacement requires a structured pre-outage preparation protocol. Before the maintenance window opens, the full robot program — including RAPID module files, system parameters, and safety configuration — must be backed up to a USB memory stick or network share using RobotStudio or the FlexPendant backup function. This backup protects against any configuration loss if the axis computer performs a cold restart after detecting a new power supply module on the backplane.
Where production scheduling allows, a hot-standby approach using a pre-configured spare IRC5 cabinet can reduce the physical swap time to under 30 minutes. For single-cabinet installations without a standby unit, the recommended sequence is: (1) controlled robot park to a safe mechanical position, (2) cabinet power-down with lockout/tagout, (3) DSQC626 swap with ESD precautions, (4) cabinet power-up and system self-test, (5) FlexPendant diagnostic check, (6) program restore if required, and (7) supervised production restart at reduced speed for the first cycle. Following this sequence, most experienced field engineers report a total outage window of 45–90 minutes for a straightforward DSQC626 replacement, preserving the original RAPID program logic and fieldbus node addresses without reprogramming.
For facilities with strict SLA requirements, SMARTNEXMSK offers advance stock reservation and same-day dispatch to support emergency retrofit schedules. Contact our technical team with your robot serial number and cabinet revision to confirm part compatibility before ordering.
Retrofit Support FAQ
Q1: Is the DSQC626 (3HAC026289-001) a direct replacement for the DSQC609?
The DSQC626 and DSQC609 serve different functional roles within the IRC5 cabinet. The DSQC609 is the power supply unit for earlier IRC5 revisions, while the DSQC626 is the designated replacement for cabinets that have been updated to the revised backplane layout. Before ordering, confirm your cabinet’s backplane revision against the ABB IRC5 product manual or contact us with your cabinet serial number for a compatibility check.
Q2: Will I need to reprogram the robot after replacing the DSQC626?
In most cases, no. The DSQC626 is a power supply module and does not store program data. Provided the axis computer (DSQC668) and main computer (DSQC639) retain their configuration during the swap, the RAPID program and system parameters will be preserved. A full backup prior to the replacement is strongly recommended as a precaution.
Q3: What wiring checks are required before installation?
Verify the P1 and P2 power connector pinout against the IRC5 cabinet wiring diagram. Confirm that the 24 VDC logic supply voltage is within specification before powering up the new module. Inspect the X1 signal harness for corrosion or damaged contacts, particularly in high-humidity or high-vibration environments. If the cabinet has experienced repeated power fault alarms, also inspect the DSQC662 I/O module connectors for signs of thermal stress.
Q4: What does the 12-month warranty cover?
The 12-month warranty covers functional defects in the DSQC626 module under normal operating conditions consistent with ABB IRC5 cabinet specifications. It does not cover damage resulting from incorrect installation, overvoltage events, or use outside the rated environmental parameters. All units are pre-shipment tested. In the event of a warranty claim, SMARTNEXMSK will arrange replacement dispatch upon receipt and inspection of the returned module.
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