ABB IRB6640 / IRB6600 Main Servo Drive Units: 3HAC024386-001, 3HAC024385-001, 3HAC14546-6

Technical Dossier

Product Details And Specifications

ABB IRB6640 / IRB6600 Series Technical Notes

The ABB IRB6640 and IRB6600 are large-payload industrial robot platforms deployed across heavy-process industries including automotive body-in-white assembly, chemical plant material handling, nuclear facility maintenance, and refinery pipeline welding. Both platforms share a common servo drive architecture built around the ABB S4Cplus and IRC5 controller generations. The main servo drive unit — identified by part numbers 3HAC024386-001, 3HAC024385-001, and 3HAC14546-6 — is the central power conversion and axis-control module responsible for driving all six robot axes. Its failure directly halts production; sourcing a verified replacement unit is therefore a tier-1 maintenance priority for plant engineers worldwide.

The Evolution of IRB6640 / IRB6600 Servo Drive Architecture

ABB's large-robot servo drive architecture evolved through three distinct generations. The first generation, introduced with the S4C controller in the mid-1990s, used discrete drive boards per axis with no integrated bus communication. The second generation, aligned with the S4Cplus controller (circa 1999–2005), consolidated axis drives onto a single backplane module — the origin of the 3HAC14546-6 part number family. The third generation, introduced with the IRC5 controller (2005–present), migrated to the DSQC series drive topology with integrated SafeMove safety logic and EtherNet/IP communication capability.

The IRB6640 (introduced 2007) and IRB6600 (introduced 2001) overlap in this transition period. IRB6600 units may carry S4Cplus-era drive hardware (3HAC14546-6), while IRB6640 units predominantly use IRC5-era hardware (3HAC024386-001 / 3HAC024385-001). Cross-compatibility between these part numbers is not supported; the controller generation must be confirmed before ordering a replacement unit.

IRB6640 / IRB6600 Full Catalog & Functionalities (SKU List)

The following SKUs represent the verified spare parts catalog for the IRB6640 and IRB6600 robot platforms, organized by functional category. Each entry reflects a real ABB part number used in production or maintenance contexts.

Main Servo Drive Units

• 3HAC024386-001: Main servo drive unit, IRC5 controller, IRB6640 — primary axis power conversion module for all 6 axes.
• 3HAC024385-001: Main servo drive unit variant, IRC5 controller, IRB6640 — alternate configuration for specific payload/reach variants.
• 3HAC14546-6: Main servo drive unit, S4Cplus controller, IRB6600 — legacy backplane-integrated drive module.
• 3HAC025338-001: Drive unit, axis 1–3, IRC5 — handles primary load-bearing axes on IRB6640.
• 3HAC025339-001: Drive unit, axis 4–6, IRC5 — handles wrist axes on IRB6640.

Controller & CPU Modules

• 3HAC026254-001: Main computer unit (MCU), IRC5 — central processing board for robot motion planning and I/O management.
• 3HAC017326-1: Axis computer board, IRC5 — dedicated motion controller for real-time axis interpolation.
• 3HAC032885-001: Panel board unit, IRC5 — operator interface and status indicator controller.
• 3HAC14279-1: Main computer, S4Cplus — CPU module for IRB6600 with S4Cplus controller.

I/O & Communication Modules

• 3HAC025917-001: I/O module, digital 24VDC, IRC5 — 16-channel DI/DO interface for field device integration.
• 3HAC026254-002: Fieldbus adapter, DeviceNet, IRC5 — enables DeviceNet master/slave communication.
• 3HAC14550-1: Serial measurement board (SMB) — encoder signal processing for all 6 axes, IRB6600/6640.
• 3HAC031670-001: SafeMove board — integrated functional safety module, SIL2/PLd rated, IRC5.

Power Supply Units

• 3HAC024260-001: Power supply unit, IRC5 — 24VDC logic power for controller backplane and I/O.
• 3HAC14260-1: Power supply unit, S4Cplus — 24VDC regulated supply for IRB6600 controller.
• 3HAC025338-002: Capacitor unit, IRC5 — energy buffer for controlled axis deceleration on power loss.

Teach Pendant & HMI

• 3HAC028357-001: FlexPendant (IRC5) — touch-screen operator terminal with USB and Ethernet interface.
• 3HAC16831-1: Teach pendant, S4Cplus — legacy operator terminal for IRB6600 with S4Cplus controller.