3HAC043904-001 ABB DSQC633C Robot SMB Unit

3HAC043904-001 is an ABB DSQC633C Measurement Unit, commonly identified as an SMB Unit or Serial Measurement Board in ABB robot documentation.

 

The unit is part of the measurement system used in ABB industrial robots. ABB's spare-parts documentation for the IRB 6700 / IRB 6700Inv identifies DSQC633C as the SMB measurement unit and assigns 3HAC043904-001 as its spare-part number.

 

ABB documentation for other robot platforms also continues to identify 3HAC043904-001 as DSQC633C, including the OmniCore V400XT product manual, where it is listed as the required Measurement Unit spare part.

 

For replacement sourcing, the complete article number 3HAC043904-001 and the designation DSQC633C should be checked together, particularly when maintaining an existing ABB robot installation.

 

 

 

The SMB, or Serial Measurement Board, is associated with the robot's measurement system. It provides the hardware interface used for serial measurement information from the robot's motor/axis feedback system.

 

This function is important for the controller's ability to determine robot-axis position and maintain the measurement information required by the robot control system.

 

ABB's RobotWare technical reference documentation specifically refers to DSQC633C in connection with serial measurement board functionality and states that systems requiring this level of SMB functionality need DSQC633C or a later supported SMB version.

 

This makes DSQC633C a distinctly different component from general-purpose ABB I/O modules. Its primary role is related to the robot's measurement and feedback architecture.

 

 

3HAC043904-001 is documented across several ABB robot platforms.

 

For the IRB 6700 / IRB 6700Inv, ABB's spare-parts documentation places DSQC633C under the electrical-parts section titled SMB unit. The same part number is listed for all variants covered by that spare-parts document.

 

ABB's IRB 6700 product manual also provides a dedicated procedure for replacing the SMB unit and identifies the installed component as SMB (serial measurement board).

 

The same article number is also used in ABB documentation for the OmniCore V400XT, where 3HAC043904-001 is listed as the DSQC633C Measurement Unit.

 

Because ABB has used DSQC633C across more than one robot/controller generation, replacement should always be checked against the specific robot model and existing configuration rather than relying on the part number alone.

 

 

The term SMB is important when searching for this component.

 

ABB documentation uses several closely related descriptions:

 

• SMB
• SMB unit
• Serial Measurement Board
• Measurement Unit
• DSQC633C
• 3HAC043904-001

 

These terms refer to the same basic ABB identification in the documentation reviewed for this product. The official spare-parts description is DSQC633C Measurement unit, while service documentation commonly refers to the component as the SMB unit or serial measurement board.

 

For your product page, I recommend keeping SMB Unit and Serial Measurement Board prominent because they correspond closely with the terminology used by robot maintenance personnel.

 

 

 

When replacing an ABB DSQC633C SMB unit, the complete part number should be verified before ordering.

 

Recommended identification points include:

 

• ABB article number: 3HAC043904-001
• Type designation: DSQC633C
• Existing SMB unit identification
• Robot model
• Controller generation
• Existing battery/SMB arrangement
• Mechanical mounting arrangement
• Connector and harness configuration

 

ABB's IRB 6700 spare-parts documentation shows that the SMB assembly is associated with other nearby components such as the SMB cover, battery unit, battery/SMB cable and battery holder.

 

Therefore, if a customer is replacing only the measurement unit, it is useful to distinguish 3HAC043904-001 / DSQC633C from the surrounding SMB enclosure and battery components.

 

 

The SMB assembly in ABB robot systems is closely associated with the robot's battery-backed measurement system.

 

For the IRB 6700/6700Inv spare-parts assembly, ABB lists:

 

• DSQC633C Measurement Unit - 3HAC043904-001
• Battery Unit - 3HAC044075-001
• Cable Battery/SMB - 3HAC046287-001
• Battery Holder - 3HAC044161-001
• SMB Bracket - 3HAC044073-001

 

These are separate spare parts and should not be confused with the DSQC633C measurement unit itself.

 

This distinction can be particularly useful when customers are diagnosing an SMB-related maintenance issue and are unsure whether they need the board, battery, cable, or mounting components.

 

 

 

The ABB documentation located for this exact part provides reliable identification and application information, but does not provide a complete set of standalone electrical specifications for the 3HAC043904-001 unit.

 

Property	Confirmed Information
ABB Article Number	3HAC043904-001
Type Designation	DSQC633C
Description	Measurement Unit
Common Identification	SMB Unit
Board Type	Serial Measurement Board
Product Family	ABB Robotics
Application	Robot measurement system
IRB 6700 Spare-Part Reference	Yes
OmniCore V400XT Spare-Part Reference	Yes

 

I recommend not adding unverified voltage, current, dimensions, weight, communication protocol, number of encoder channels or I/O counts to this page. A number of third-party listings describe DSQC633C as an I/O board and publish detailed I/O specifications, but those descriptions conflict with ABB's own documentation, which identifies the unit as a measurement/SMB component.

 

For your site, keeping this distinction clear is much safer than filling the page with questionable specifications.

 

 

Customers may encounter several different descriptions for this same ABB part while searching older documentation or supplier inventories:

 

• 3HAC043904-001
• 3HAC043904001
• 3HAC043904 001
• 3HAC 043904-001
• DSQC633C
• DSQC 633C
• DSQC-633C
• ABB DSQC633C
• ABB 3HAC043904-001
• DSQC633C SMB Unit
• DSQC633C Measurement Unit
• ABB Serial Measurement Board
• ABB SMB Unit
• ABB Robot SMB Board
• ABB Robot Measurement Unit

 

The exact ABB article number should remain the primary identification because similar DSQC designations exist within the ABB Robotics product family.

 

 

For internal navigation, this page can naturally connect to other ABB robot spare-part pages involving the measurement and electrical assembly.

 

Relevant themes include:

 

• ABB Robot SMB Units
• ABB Serial Measurement Boards
• ABB Robot Measurement Units
• ABB Robot Electrical Parts
• ABB IRB 6700 Spare Parts
• ABB Robot Spare Parts
• ABB Legacy Robot Parts

 

If you later have the associated battery, cable, SMB bracket and cover pages online, those products would also make useful same-assembly internal links.

 

 

What is ABB 3HAC043904-001?

3HAC043904-001 is the ABB article number for the DSQC633C Measurement Unit, commonly referred to as an SMB Unit or Serial Measurement Board.

 

What is DSQC633C?

DSQC633C is an ABB robot Measurement Unit / Serial Measurement Board used as part of the robot's measurement system. ABB identifies 3HAC043904-001 as its spare-part number.

 

Is 3HAC043904-001 an I/O module?

It should not be presented as a general-purpose I/O module. ABB's own documentation identifies it as a Measurement Unit / SMB Unit, associated with the robot's serial measurement system.

 

Which ABB robots use DSQC633C?

ABB documentation confirms its use in systems including the IRB 6700 / IRB 6700Inv, and ABB's OmniCore V400XT documentation also lists 3HAC043904-001 as the DSQC633C Measurement Unit.

 

Is DSQC633C still relevant to newer ABB robot systems?

ABB documentation continues to reference 3HAC043904-001 / DSQC633C in recent manuals, although actual compatibility depends on the specific robot and controller configuration.

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