ABB 3HAC026787-002
ABB 3HAC026787-002
ABB 3HAC026787-002
ABB 3HAC026787-002
ABB 3HAC026787-002

ABB 3HAC026787-002 | IRC5 Series Servo Drive Module for Robot Joint Control

  • Brand: ABB
  • Model: 3HAC026787-002
  • Product Type: Servo Drive Module
  • Series: IRC5 Series
  • Core Function: Drives robot joint motors with closed-loop position/velocity control; processes encoder feedback and executes motion commands from IRC5 controllers.
  • Key Specs: 400V AC input (3-phase), 10A continuous current (30A peak), EtherCAT communication, supports absolute encoders (EnDat 2.2).
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Description

3HAC026787-002: Product Overview
The 3HAC026787-002 is a servo drive module within ABB’s IRC5 series, designed for integration into industrial robot control systems. Its role is to act as a joint motor amplifier, positioned in the robot control cabinet to drive individual axes (e.g., shoulder, elbow, wrist) of articulated robots. In applications like welding, assembly, and material handling, it translates high-level motion commands from the IRC5 controller into precise current/voltage signals for servo motors, ensuring accurate trajectory tracking.
Functionally, the module processes incremental/absolute encoder feedback (e.g., EnDat 2.2, Hiperface) to monitor motor position and velocity, adjusting output via a field-oriented control (FOC) algorithm. It handles 400V AC 3-phase input, delivering up to 30A peak current for dynamic load changes (e.g., accelerating a 20kg payload). As part of the IRC5 platform, it leverages modular hot-swappable design, compatibility with ABB RobotStudio simulation software, and native integration with IRC5 Compact/Standard controllers. Benefits include reduced wiring complexity (via EtherCAT), scalable axis control (up to 6 axes per controller), and compliance with ISO 9283 robot performance standards.

ABB 3HAC026787-002

ABB 3HAC026787-002

3HAC026787-002: Technical Specifications
  • Model Number: 3HAC026787-002
  • Manufacturer: ABB
  • Product Type: Servo Drive Module
  • Input Voltage: 400V AC (3-phase, 380-480V range), 50/60Hz
  • Continuous Output Current: 10A (per axis)
  • Peak Output Current: 30A (for 5s, overload condition)
  • Communication Protocol: EtherCAT (100Mbps, daisy-chain topology)
  • Encoder Support: Absolute (EnDat 2.2, Hiperface SL) and incremental (TTL, sine-cosine)
  • Control Algorithm: Field-Oriented Control (FOC) with PID tuning
  • Operating Temperature: 0°C to +55°C (cabinet-mounted, with forced air cooling)
  • Protection Rating: IP20 (panel-mount, requires cabinet enclosure)
  • Dimensions: 150mm x 100mm x 50mm (height x width x depth)
  • Weight: 1.2kg
  • Cooling Method: Forced air (requires 50mm clearance for fan intake/exhaust)
  • Certifications: CE, UL, cULus, RoHS, IEC 61800-5 (adjustable speed drives)
Core Features & Customer Value​
EtherCAT communication for real-time control: The module’s EtherCAT interface enables deterministic data exchange with the IRC5 controller (cycle time <1ms), critical for high-speed applications like electronic component placement (0.3s/component). For engineers, this eliminates analog wiring between controller and drive, reducing cabling errors during commissioning.
Absolute encoder compatibility for zero-position retention: Support for EnDat 2.2/Hiperface SL encoders stores position data in non-volatile memory, allowing robots to resume operation after power loss without homing. In automotive welding lines, this prevents 15-minute homing sequences after shift changes, boosting uptime.
Field-oriented control for dynamic accuracy: The FOC algorithm optimizes torque production across the motor’s speed range, maintaining ±0.02mm repeatability in pick-and-place tasks. For manufacturers, this reduces part rejection rates—e.g., in pharmaceutical blister packing, misaligned seals dropped from 2% to 0.1%.
Modular hot-swappable design for minimal downtime: Failed modules can be replaced without removing the robot from service (when paired with redundant axes). Technicians use ABB’s DriveManager software to clone parameter sets to new modules in <10 minutes, compared to 2-hour recalibration for non-modular drives.

ABB 3HAC026787-002

ABB 3HAC026787-002

Typical Applications​
In an automotive assembly plant’s IRB 6700 welding robot, the module drives the 6th axis (wrist rotation) to align the torch with car body seams. EtherCAT synchronizes its motion with the robot’s main controller, adjusting speed based on laser sensor feedback (±0.1mm tolerance). During a weld gun change, the hot-swappable design allows drive replacement without halting the line.
At an electronics manufacturer, it controls the J3 axis of an IRB 120 SCARA robot placing SMD components. The absolute encoder ensures the robot returns to the same position after a power blip, avoiding misalignment of 0201-sized capacitors. The 30A peak current handles rapid acceleration (5m/s²) when switching between feeders.
In a logistics warehouse, the module drives the vertical axis of an IRB 660 palletizer, lifting 1-ton loads. Its overload protection (30A peak for 5s) prevents motor burnout during sudden load shifts, while forced-air cooling sustains performance in the warm warehouse environment.

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