ABB IRB6700 Series Robot Servo Modules: 3HAC055700-003 / 3HAC043075-002 / 3HAC043075-003 / 3HAC034712-001 | IRB6700-300 & IRB2400

Technical Dossier

Product Details And Specifications

ABB IRB6700 Series: Comprehensive Module Range and Technical Overview

The ABB IRB6700 is a large industrial robot series engineered for heavy-duty payload applications in the range of 150–300 kg. It is deployed across global heavy industry sectors including automotive body-in-white assembly, chemical plant material handling, nuclear facility maintenance robotics, and refinery pipeline welding automation. The IRB6700 platform replaced the IRB6640 as ABB's primary large-robot offering and has accumulated significant installed base across Tier-1 automotive OEMs in Europe, North America, and Asia-Pacific. Its servo drive and axis computer modules are critical long-lifecycle components subject to high demand in the MRO (Maintenance, Repair & Overhaul) market.

The Evolution of IRB6700 Architecture

The IRB6700 series was introduced in 2013 as a successor to the IRB6640, built on ABB's IRC5 controller platform. The IRC5 controller uses a modular drive architecture (DSQC series boards) paired with axis computers and servo drive units identified by 3HAC-prefixed part numbers. Early IRB6700 units (2013–2016) used first-generation axis computer assemblies. From 2017 onward, ABB introduced revised servo motor harness assemblies and updated axis computer boards to improve thermal performance and reduce cable fatigue in high-cycle applications. The IRB6700-300/2.6 and IRB6700-235/2.65 variants share a common mechanical platform but differ in servo motor sizing on axes 1–3. Compatibility between 3HAC043075-002 and 3HAC043075-003 is revision-level only; both are functionally interchangeable within the same axis group. The IRB2400 (referenced in the original SKU bundle) is a separate, earlier-generation medium-payload robot (7–20 kg) also on the IRC5 platform, sharing some common spare part logic with the IRB6700 supply chain.

IRB6700 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified components within the ABB IRB6700 and associated IRC5 ecosystem. Each entry reflects a discrete, sourced part number with defined function:

3HAC055700-003: Axis computer unit, IRB6700 series, primary motion control processor board.
3HAC043075-002: Servo drive module, IRB6700 axis 1–3, revision 2, high-current output stage.
3HAC043075-003: Servo drive module, IRB6700 axis 1–3, revision 3, updated thermal interface.
3HAC034712-001: Cable harness assembly, IRB6700 lower arm, axis 2–3 motor power routing.
3HAC026253-001: Axis computer, IRC5 controller, DSQC668 equivalent, multi-axis coordination.
3HAC025338-001: Drive unit, IRC5 single-drive module, 400V input, axes 4–6 servo output.
3HAC031670-001: Brake release unit, IRB6700, safety-rated axis brake control module.
3HAC044168-001: Balancing cylinder assembly, IRB6700-300, axis 2 counterbalance hydraulic unit.
3HAC028357-001: Teach pendant cable, IRC5, 10m, FlexPendant interface harness.
3HAC029157-001: Power supply unit, IRC5 controller cabinet, 24VDC auxiliary rail.
3HAC032885-001: Wrist unit, IRB6700, axes 4–6 integrated gearbox and motor assembly.
3HAC040508-001: Serial measurement board (SMB), IRB6700, resolver signal processing unit.
3HAC026254-001: Drive system, IRC5, dual-drive module, 400V, axes 1–2 high-torque output.
3HAC057546-001: Motor, IRB6700 axis 1, 3-phase AC servo, flange-mount, high-inertia rated.
3HAC057547-001: Motor, IRB6700 axis 2, 3-phase AC servo, vertical load optimized.
3HAC057548-001: Motor, IRB6700 axis 3, 3-phase AC servo, upper arm drive unit.
3HAC057549-001: Motor, IRB6700 axis 4, 3-phase AC servo, wrist rotation primary.
3HAC022033-001: Contactor unit, IRC5 main cabinet, motor power switching relay assembly.

Sourcing Hard-to-Find & Obsolete IRB6700 Parts

DriveKNMS maintains a dedicated inventory program for ABB IRB6700 and IRC5 ecosystem components, including parts that have reached end-of-production status at ABB's factory. For facilities operating IRB6700 robots beyond their standard 10-year service window, sourcing replacement axis computers (3HAC055700-003) and servo drive modules (3HAC043075-002 / -003) through the open market is the primary path to lifecycle extension without full robot replacement. DriveKNMS sources these units from decommissioned robot lines, certified refurbishers, and bonded warehouse stock. All units are cross-referenced against ABB's published revision history to ensure hardware compatibility with the target robot's software version and IRC5 cabinet generation. Customers are advised to provide their robot serial number and IRC5 cabinet serial number when inquiring, to allow precise revision matching.

Quality Control for the IRB6700 Range

IRB6700 servo drive and axis computer modules undergo a structured test protocol at DriveKNMS prior to dispatch. Axis computer boards (e.g., 3HAC055700-003) are bench-tested for resolver signal integrity, EtherNet/IP communication handshake, and EEPROM parameter retention. Servo drive modules (3HAC043075-002 / -003) are load-tested at rated current output across all three phases, with thermal imaging used to verify IGBT junction integrity. Cable harness assemblies (3HAC034712-001) are continuity-tested pin-by-pin and inspected for insulation breakdown at connector terminations. Serial measurement boards (3HAC040508-001) are validated against known-good resolver feedback signals to confirm ADC linearity. All tested units are issued a DriveKNMS inspection record with test date, technician ID, and pass criteria documentation.