ABB IRB 6600 Modules IRB66003HAC037635-003 VR3HAC037635-001/002/003/005 3HAC037635-001

Technical Dossier

Product Details And Specifications

ABB IRB 6600 Series Technical Notes

The ABB IRB 6600 is a heavy-duty industrial robot platform engineered for high-payload applications across global process industries. With a payload capacity ranging from 175 kg to 500 kg and a reach envelope of up to 2.55 m, the IRB 6600 has established a significant installed base in automotive body-in-white assembly, chemical plant material handling, nuclear facility maintenance operations, and petroleum refinery process automation. Its IRC5 controller architecture, combined with a modular mechanical design, enables field-replaceable axis computer units, drive modules, and wrist assemblies — making long-term spare parts availability a critical operational requirement for plant maintenance teams worldwide.

The Evolution of IRB 6600 Architecture

The IRB 6600 platform was introduced by ABB Robotics as a successor to the IRB 6400 series, transitioning from the S4C+ controller to the IRC5 single-cabinet controller architecture. This generational shift introduced a distributed motion control topology, where axis computer boards (DSQC series) communicate over a proprietary SERNET bus rather than the earlier parallel backplane design. Key architectural milestones include:

• Generation 1 (IRC5 launch, ~2004): Introduction of the modular drive unit (MDU) concept. Axis computers DSQC 668 and DSQC 601 defined the control layer.
• Generation 2 (mid-cycle refresh): Integration of SafeMove safety supervision modules and updated teach pendant (FlexPendant) compatibility. Wrist unit assemblies were revised with updated encoder harness routing (3HAC037635-001 family).
• Generation 3 (current production): RobotWare 6.x compatibility, updated axis computer DSQC 1000, and revised upper arm / wrist mechanical assemblies with improved IP67 sealing. Backward compatibility with earlier IRC5 cabinets is maintained at the controller level but requires firmware alignment.

IRB 6600 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified components within the ABB IRB 6600 mechanical and control ecosystem. Each entry reflects a discrete, field-replaceable unit (FRU) with a defined functional role.

Wrist & Upper Arm Assemblies

• 3HAC037635-001: Wrist unit assembly, axis 4/5/6, IRB 6600 — primary FRU for wrist rebuild or replacement after collision or bearing failure.
• 3HAC037635-003: Wrist unit assembly variant, revised sealing specification — direct replacement for 3HAC037635-001 in updated production batches.
• 3HAC14980-1: Upper arm assembly, IRB 6600-175/2.55 — structural upper arm with integrated cable conduit.
• 3HAC025338-001: Axis 5 motor unit, IRB 6600 — AC servo motor with resolver, direct-mount to upper arm gearbox.
• 3HAC025339-001: Axis 6 motor unit, IRB 6600 — compact AC servo motor for wrist rotation axis.

Gearbox & Drive Components

• 3HAC028357-001: Axis 1 gearbox, IRB 6600 — primary swing axis reduction unit, grease-lubricated.
• 3HAC028358-001: Axis 2 gearbox, IRB 6600 — lower arm pivot reduction unit.
• 3HAC028359-001: Axis 3 gearbox, IRB 6600 — upper arm elevation reduction unit.
• 3HAC025337-001: Axis 4 gearbox, IRB 6600 — wrist roll reduction unit, integrated into upper arm casting.

Controller & Axis Computer Modules (IRC5)

• DSQC 668 / 3HAC025338-001: Axis computer board, IRC5 — manages motion control for axes 1–6 via SERNET bus.
• DSQC 601 / 3HAC12815-1: Main computer unit, IRC5 — system CPU running RobotWare OS.
• DSQC 662 / 3HAC026254-001: I/O module, digital 24 VDC — 16 DI / 16 DO, DeviceNet compatible.
• DSQC 663 / 3HAC026257-001: I/O module, analog — 4 AI / 4 AO, ±10 V / 4–20 mA configurable.
• DSQC 609 / 3HAC14279-1: Power supply unit, IRC5 cabinet — 24 VDC regulated output for control electronics.

Encoder & Harness Components

• VR3HAC037635-001: Encoder harness, wrist unit, variant 001 — resolver signal cable assembly for axis 4/5/6.
• VR3HAC037635-002: Encoder harness, wrist unit, variant 002 — revised connector pinout for updated wrist assembly.
• VR3HAC037635-003: Encoder harness, wrist unit, variant 003 — extended length version for floor-mount configurations.
• VR3HAC037635-005: Encoder harness, wrist unit, variant 005 — high-flex cable specification for continuous rotation applications.
• 3HAC037635-003: Wrist harness assembly, complete — includes VR3HAC037635 series cables pre-routed and terminated.

Quality Control for the IRB 6600 Range

IRB 6600 wrist and upper arm assemblies present specific quality verification challenges due to their multi-axis mechanical integration and resolver-based encoder architecture. DriveKNMS applies the following test protocol to all IRB 6600 units prior to shipment:

• Dimensional Inspection: Wrist flange runout measured per ABB tolerance specification using CMM. Axis 4/5/6 backlash verified against OEM service manual limits.
• Resolver Signal Verification: VR3HAC037635 series encoder harnesses tested for signal continuity, insulation resistance (>100 MΩ at 500 VDC), and resolver excitation response using a dedicated resolver analyzer.
• Torque & Load Test: Gearbox output torque verified under rated load conditions. Abnormal noise, vibration, or thermal rise triggers rejection and root-cause analysis.
• IP Sealing Check: Wrist assemblies subjected to IP67 pressure test per IEC 60529 to verify gasket and seal integrity after rebuild.
• Functional Run-In: Reconditioned units are cycled through a defined motion profile on an IRC5-compatible test rig for a minimum of 4 hours before final inspection sign-off.