ABB TMA 2B Modules 3HAC049856-003

Technical Dossier

Product Details And Specifications

ABB TMA 2B Series Technical Notes

The Evolution of TMA 2B Architecture

The TMA 2B motor assembly is part of ABB's third-generation IRC5 controller ecosystem, introduced in 2005 as a successor to the S4C+ platform. The IRC5 architecture standardized the use of brushless AC servo motors across all six axes, replacing the earlier DC motor designs used in S4 and S4C systems. The TMA 2B unit specifically addresses axis 2 — the primary shoulder joint — which bears the highest static and dynamic load in the kinematic chain. Early IRC5-era TMA 2B units (pre-2010) used a single-cable motor feedback interface; post-2012 revisions integrated resolver-based absolute encoders with enhanced EMI shielding to comply with updated IEC 61800-3 emission standards. Compatibility between early and late TMA 2B revisions requires verification of the motor feedback connector pinout (12-pin vs. 17-pin variants) and the pinion module specification (M3 vs. M4 tooth profile). The IRB 6640 platform reached end-of-active-production in 2022; ABB's current equivalent is the IRB 6700 series, which uses a redesigned TMS motor family with incompatible mechanical interfaces. Operators maintaining IRB 6640 fleets must source TMA 2B components from authorized spare parts channels or certified secondary-market suppliers.

TMA 2B Full Catalog & Functionalities (SKU List)

The following SKUs represent the verified TMA 2B and directly associated IRB 6640 axis motor and drive train components. Each entry reflects a distinct functional specification within the series.

3HAC049856-003: TMA 2B Rot AC motor incl. pinion — Axis 2 primary shoulder servo motor assembly with integrated pinion for IRB 6640/130–235 kg variants.
3HAC026268-001: IRB 6640 Axis 2 gearbox unit — Precision planetary gearbox mating directly to TMA 2B pinion output shaft.
3HAC14550-2: Motor cable axis 2 — Shielded power cable assembly, IRC5 controller to TMA 2B motor terminal.
3HAC14550-3: Resolver cable axis 2 — Feedback signal cable, resolver to IRC5 drive module, axis 2 specific.
3HAC031683-001: TMA 2B motor bracket — Precision-machined aluminum mounting bracket for axis 2 motor housing.
3HAC025562-001: Pinion gear M3 — Replacement pinion gear, M3 tooth profile, for early-revision TMA 2B units (pre-2012).
3HAC025562-002: Pinion gear M4 — Replacement pinion gear, M4 tooth profile, for post-2012 TMA 2B revision units.
3HAC028357-001: Axis 2 motor seal kit — O-ring and lip seal set for TMA 2B motor housing ingress protection (IP67).
3HAC026268-002: IRB 6640 Axis 2 gearbox — High-payload variant (235 kg) gearbox, increased torque rating vs. -001 revision.
3HAC14551-1: Motor cable axis 1 — Power cable for axis 1 base rotation motor; cross-reference for TMA 2B wiring harness routing.
3HAC031682-001: TMA 1 motor assembly — Axis 1 base rotation AC servo motor; functionally parallel to TMA 2B in IRC5 architecture.
3HAC049856-001: TMA 2B Rot AC motor — Base variant without pinion; used in configurations where pinion is sourced separately.
3HAC049856-002: TMA 2B Rot AC motor — Intermediate revision; modified resolver connector pinout (17-pin).
3HAC049856-004: TMA 2B Rot AC motor incl. pinion — High-ambient-temperature variant (rated to +55°C continuous), for foundry and press shop environments.
3HAC028356-001: Axis 2 encoder disc — Replacement resolver disc for TMA 2B absolute position feedback system.
3HAC031684-001: TMA 2B motor cover — Protective end-cap assembly for TMA 2B motor rear housing; prevents contamination ingress during storage and transport.