DSQC 664 (3HAC030923-001) is the Additional Drive Unit (ADU-790A) for the ABB IRC5 robot controller — the expansion drive module that enables the IRC5 to control external servo axes such as track units, rotary positioners, and gantry systems beyond the robot’s standard axis count.
Ordered under part number 3HAC030923-001 and designated DSQC 664 (ADU-790A), this unit connects directly to the DSQC 663 Main Drive Unit (3HAC029818-001) via a dedicated DC-bus harness (3HAC032612-001) and an Ethernet data link. Up to three DSQC 664 units can be added to a single IRC5 controller, each managing one additional servo axis.
The DSQC 664 is available through Atlantech Drives — typical delivery 1–2 weeks, worldwide express shipping, 12-month warranty.
What Is the DSQC 664 (3HAC030923-001)?
The DSQC 664 is the expansion drive unit within the IRC5 M2004 drive system architecture. While the DSQC 663 MDU-790A handles the robot’s primary axes, the DSQC 664 ADU-790A extends the system’s motion control capability to external mechanical units — track units that reposition the robot along a linear axis, rotary positioners that orient the workpiece, or multi-robot MultiMove configurations requiring coordinated axis control.
The DSQC 664 is not a standalone unit — it requires the DSQC 663 as the primary drive module and shares its DC bus. This dependency is critical for procurement: a DSQC 664 cannot replace a DSQC 663, and an IRC5 without a functioning DSQC 663 cannot operate a DSQC 664.
One important exception documented in the ABB IRC5 Product Manual: the IRB 8700 robot requires two DSQC 664 units in addition to the DSQC 663 for its own axes. This leaves no ADU capacity for an additional external axis on an IRB 8700 installation — a constraint that affects system design decisions before procurement.
Key Technical Specifications
- Part Number: 3HAC030923-001
- Secondary Reference: DSQC 664
- ABB Designation: ADU-790A (Additional Drive Unit)
- Function: Additional drive unit for external servo axes — track units, positioners, gantries
- Approximate Dimensions: 380 × 240 × 120 mm
- Maximum units per IRC5: 3 (one per additional axis)
- Required prerequisite: DSQC 663 MDU-790A (3HAC029818-001)
- DC-bus harness: 3HAC032612-001 (Harn-MDU/ADU DC-bus)
- Compatible Controllers: IRC5 Single, IRC5P Paint Controller
- Country of Origin: China (CN)
- Minimum Order Quantity: 1 unit
DSQC 664 vs. Related IRC5 Drive System Components — Series Comparison
| Model | Part Number | Function | Role | Max per IRC5 | Requires |
|---|---|---|---|---|---|
| DSQC 663 | 3HAC029818-001 | Main Drive Unit (MDU-790A) | Primary — mandatory | 1 | — |
| DSQC 664 | 3HAC030923-001 | Additional Drive Unit (ADU-790A) | Optional — external axes | 3 | DSQC 663 |
| DSQC 668 | 3HAC029157-001 | Axis Computer | Motion control processor | — | — |
| DSQC 662 | 3HAC026254-001 | Power Distribution Unit | Upstream power distribution | 1 | — |
Data sourced from official ABB manufacturer documentation. Contact Atlantech Drives to verify current availability of specific models.
Typical Industrial Applications
The DSQC 664 is essential in any IRC5 installation that uses external mechanical units coordinated with the robot’s motion. The most common applications are linear track systems (7th axis) where the robot travels along a rail to extend its working envelope, and rotary positioners (also typically the 7th axis) that index the workpiece while the robot works on the opposite side.
In automotive welding cells, a single IRC5 with one DSQC 664 typically manages the robot plus a rotary positioner — allowing continuous production while one side is being worked on. In larger multi-robot cells using MultiMove, additional DSQC 664 units coordinate axes shared across multiple manipulators under a single IRC5 controller.
Paint booth variants (IRC5P) also support the DSQC 664 for positioner control, though paint-specific environmental requirements apply to adjacent components. Confirm the exact IRC5P configuration with ABB documentation before ordering for paint applications.
DSQC 664 as a Replacement — Installation and Compatibility Notes
The DSQC 664 (3HAC030923-001) connects to the IRC5 via two physical links: a DC-bus harness (3HAC032612-001) shared with the DSQC 663, and an Ethernet data cable between the MDU (A41.1) and the ADU (A41.3) as specified in the IRC5 Product Manual (3HAC047136-001). Both connections must be correctly established for the DSQC 664 to initialise on the IRC5 bus.
After physical installation, the additional axis controlled by the DSQC 664 must be configured in RobotStudio — unlike the main robot axes which are pre-configured, external axes require explicit definition of the mechanical unit, axis parameters, and motion coordination mode. No automatic axis detection occurs; the IRC5 will not use the DSQC 664 until the software configuration is complete.
Perform a full lockout/tagout procedure before installing or replacing a DSQC 664. The unit shares the DC bus with the DSQC 663 and is subject to the same residual capacitor charge risk — always allow 5 minutes after power-off and verify bus discharge with a calibrated high-voltage meter before touching internal connections.
Frequently Asked Questions
Q: Can the DSQC 664 (3HAC030923-001) be used without the DSQC 663 Main Drive Unit?
A: No. The DSQC 664 is an expansion unit that depends entirely on the DSQC 663 (3HAC029818-001) for its DC bus connection and control interface. It cannot function as a standalone drive unit and cannot replace the DSQC 663 in any IRC5 configuration.
Q: How many DSQC 664 units can be installed in a single IRC5 controller?
A: Up to three DSQC 664 units can be added to a standard IRC5 Single Cabinet controller — one for each additional servo axis. The exception is the IRB 8700, which requires two DSQC 664 units for its own robot axes, leaving only one ADU position available for an external axis, or none if all three positions are used by the robot.
Q: After installing a replacement DSQC 664, the external axis does not respond — what should I check first?
A: Verify both physical connections: the DC-bus harness (3HAC032612-001) between the DSQC 663 and DSQC 664, and the Ethernet data cable between MDU port A41.1 and ADU port A41.3. Then confirm the external axis mechanical unit is correctly defined in the IRC5 system parameters in RobotStudio. A physically installed DSQC 664 that is not configured in software will not appear in the IRC5 axis list and will not generate motion output.
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