Yaskawa SGDH-04AE-OY Sigma-II Servo Driver

The Yaskawa SGDH-04AE-OY is a high-performance servo driver from the established Sigma-II series, designed for 400W AC servo motors operating on 200 VAC single-phase or three-phase power. This compact amplifier provides a frequency response of up to 400 Hz, making it a suitable choice for precision positioning, speed control, and torque control applications in industrial automation. Fully compatible with Yaskawa Sigma-II motors, the SGDH series combines advanced control algorithms with user-friendly setup procedures, offering a reliable foundation for mid-range motion control tasks.

Technical Specifications

Key Features

• High-Frequency Response: 400 Hz frequency response enables rapid tracking of motion commands, minimizing following error in high-speed positioning operations.

• Advanced Auto-Tuning: The SGDH-04AE-OY includes a built-in autotuning function that automatically adjusts gain parameters based on measured load inertial ratio, simplifying startup and reducing manual tuning time.

• Versatile Control Mode Switching: Position, speed, and torque control modes can be selected via parameters or external signals, allowing the drive to adapt to varying application requirements without hardware changes.

• Wide-Range Input Voltage: Operation on either single-phase or three-phase 200–230 VAC input provides flexibility in machine wiring and facilitates retrofitting into existing panels without mains reconfiguration.

• Multi-Axis Capability: The SGDH series can be used in multi-axis systems using Yaskawa's MECHATROLINK interface or option modules, synchronizing up to 16 axes through a single network.

Functional Overview

The SGDH-04AE-OY receives low-level command signals from a motion controller and converts them into high-power three-phase output to drive a Sigma-II motor. Position commands are sent as pulse train inputs (line driver or open-collector), while speed and torque commands are typically analog voltage signals. The drive closes the control loop using encoder feedback data transmitted at high speed over the serial interface. Built-in I/O includes sequence inputs for servo-on, alarms, and home limit switches; as well as outputs for ready, alarm, and positioning completion. The drive also provides a dedicated RS-232C/RS-422 port for connection to a PC running Yaskawa's SigmaWin+ software for tuning and diagnostics.

Compatibility and Integration

The SGDH-04AE-OY is designed to operate with Yaskawa Sigma-II series motors including the SGMAH, SGMGH, and SGMPH families. It interfaces with motion controllers, PLCs, or CNC systems. The drive supports pulse train position commands from most major PLC brands. For multi-axis synchronization, an optional MECHATROLINK-II interface module can be inserted, allowing the SGDH-04AE-OY to be part of a high-speed motion control network. Integration into Rockwell, Siemens, or Omron control systems has been successfully demonstrated in many industrial retrofits and machinery OEM applications.

Installation and Configuration

Mount SGDH-04AE-OY on a vertical DIN rail or directly on a backplate, maintaining at least 30 mm clearance above and below for airflow. Use twisted-pair and shielded cables to connect the motor and encoder. Connect the host controller's pulse train output to the CN1 connector's PULS/SIGN terminals (24 V line driver or 5 V differential). If using analog speed/torque commands, connect the reference voltage to V-REF or T-REF terminals. Configure the drive for control mode, input pulse format, encoder output, and alarm settings.

Maintenance and Reliability

While the SGDH-04AE-OY is designed for trouble-free operation. No routine calibration is required. Ambient temperature and dust accumulation significantly affect reliability; ensure the control cabinet ventilation filter is cleaned regularly. The cooling fan in larger SGDH drives has a specified lifetime; listen for unusual bearing noise. The drive monitors internal temperature, DC bus voltage, motor current, encoder signal integrity, and software execution safety. Faults cause the ALM relay to change state and display a numeric code on the 7-segment LED panel to help narrow down potential causes.

Conclusion

The Yaskawa SGDH-04AE-OY Sigma-II servo driver provides a reliable and flexible solution for 400W motion control applications. With its single- or three-phase input, configurable control modes, and motor auto-tuning, the SGDH-04AE-OY remains a capable choice for machine builders upgrading existing equipment and for system integration projects where high performance at 400W power level is required.