ABB ACU-01B (3HNA024871-001-03) – Control Unit Module for ABB Industrial Robotics Controllers

The ABB ACU-01B, identified by spare part code 3HNA024871-001-03, is a controller-internal module designed for ABB industrial robot systems. From my experience, this unit typically serves as a control/coordination board within the controller backplane rather than a direct field I/O device. It’s a field-replaceable module aimed at restoring controller functionality quickly when a board failure causes communication or control faults. One thing I appreciate is how it’s built for straightforward swap-out: power down, ESD protection, release the front fasteners, and slide it out—technicians usually have it changed in minutes.

Company’s Order Placement Process and Guarantees

• Warranty: 365 days
• Delivery time: 1 week for in-stock; no more than one month at the latest
• Payment: 50% advance payment; full payment before delivery
• Express options: FedEx, UPS, DHL

Key Features

• Genuine ABB spare (3HNA024871-001-03) – Traceable part number for robotics service teams and maintenance logs.
• Backplane-powered design – Receives power and system bus connectivity from the host controller; no external PSU routing.
• Field-replaceable module – Designed for quick swap to minimize downtime during controller faults or preventive maintenance.
• Robust industrial build – Conformal-coated PCB and stable connectors help in many cases with vibration and cabinet heat cycles.
• Firmware/RobotWare alignment – You might notice best results when the ACU-01B revision aligns with your controller/RobotWare level.
• Non-field I/O role – Typically operates on the internal system bus; not intended as a direct digital/analog I/O card.

Technical Specifications

Application Fields

This module is used within ABB robot controller cabinets supporting applications like part handling, arc welding, machine tending, palletizing, and assembly. In many cases it’s the part you replace when the controller logs internal bus/coordination board errors and the robot won’t enable drives or complete boot.

Advantages & Value

• Downtime reduction – Direct drop-in swap helps get production running without re-engineering.
• Compatibility – Matches ABB controller architecture; less risk of firmware mismatch when the revision aligns with your RobotWare level.
• Cost control – Targeted board replacement is often more economical than full controller changeout.
• Service assurance – Backed by a 365-day warranty and practical technical guidance on fitment and commissioning.

Installation & Maintenance

• Environment: Install inside the controller cabinet that meets ABB’s ventilation and IP requirements. Keep ambient temperature typically within 0–55°C.
• Power-down & ESD: Fully power down, wait for DC bus discharge, and use ESD grounding before handling the board.
• Slot & seating: Insert into the designated slot; ensure the backplane connector seats evenly, then secure front-panel screws.
• Cabling: The module uses internal bus connections; do not route external field I/O to this board.
• Firmware alignment: After installation, verify software/RobotWare compatibility. A controller cold start and system check are usually recommended.
• Preventive care: Quarterly cabinet cleaning with dry air, check for connector oxidation, and keep controller firmware updated per maintenance windows.

Quality & Certifications

• Certifications: CE and RoHS applicable to controller-internal electronics; manufactured within ISO 9001 quality frameworks.
• Warranty: 365 days against manufacturing defects; replacement or repair support is provided during the coverage period.

Supporting Components (Typical in the Same Controller)

• ABB Main CPU/Controller Board (DSQC series) – Coordinates motion and system tasks; the ACU-01B works alongside it on the backplane.
• ABB I/O Modules (DSQC series) – Digital/analog I/O expansion for field devices; separate from the ACU-01B’s internal role.
• ABB Servo Drive/Axis Units – Power modules that drive robot axes; depend on controller boards for command signals.
• ABB FlexPendant – Teach pendant used for programming, jogging, and service diagnostics after the board swap.