Delta ASD-A2-0721-M AC Servo Drive ASDA-A2 Series (750 W)

Product Overview

The ASD-A2-0721-M (ASD A2 0721 M) is a high-performance 750 W AC servo drive from Delta’s premier ASDA-A2 series. Designed for sophisticated motion control, this drive operates on a 220 V single-phase input and is engineered for applications requiring high speed, high precision, and superior motion functionality. The ASD-A2-0721-M is a "Multifunction" (M-type) model, which integrates advanced features like a 20 bit superior resolution encoder and built-in Electronic Cam (E-CAM) capabilities. It is widely utilized in high-speed labeling machines, precision feeding systems, and multi-axis synchronized robotic applications where minimizing settling time and maximizing positioning accuracy are critical for operational efficiency.

Technical Configuration

The ASD-A2-0721-M architecture represents the peak of Delta's "M" (Multifunction) logic, offering a diverse array of control interfaces including CANopen, RS-485 (MODBUS), and RS-232. With a frequency response of 1 kHz, the drive ensures rapid command execution and high-speed signal processing. The integrated 20 bit absolute encoder provides 1,280,000 pulses per revolution, enabling the drive to maintain stable torque and precise positioning even at ultra-low speeds. This M-type variant also supports a powerful Internal Position (PR) mode, allowing for 64 sets of position commands to be stored and executed directly within the drive, effectively simplifying the requirements for the higher-level PLC or motion controller.

Technical Specifications

Technical FAQs

How does the "M" type model differ from other ASDA-A2 variants?

The "M" type is specifically designed for networked motion control. While it retains standard analog and pulse inputs, its primary strength lies in the built-in CANopen interface, which supports DS301 and DSP402 protocols for high-speed multi-axis synchronization.

Can the ASD-A2-0721-M handle high-vibration mechanical environments?

Yes. The drive features advanced automatic high-frequency resonance suppression and two sets of notch filters that automatically detect and eliminate mechanical resonance. This ensures smooth operation even in systems with low-rigidity mechanical components.

What is the benefit of the E-CAM (Electronic Cam) function?

The E-CAM function allows the drive to follow a customized motion profile (up to 720 points) relative to a master axis or encoder. This is ideal for applications like flying shears, rotary cuts, and synchronized master-slave movements where mechanical cams were traditionally used.

Engineering & Installation Guide

• CANopen Network Termination: When using the ASD-A2-0721-M in a CANopen network, ensure a 120 Ohm termination resistor is placed at both ends of the bus segment. Use shielded twisted-pair cabling specifically rated for CAN communication to prevent data packet loss caused by electromagnetic noise.

• Thermal Clearance: To maintain the 1 kHz frequency response and prevent thermal throttling, the drive must be installed vertically. Maintain a minimum gap of 10 mm between adjacent drives if side-by-side mounting is necessary, and ensure a 50 mm clearance above and below for optimal airflow.

• Wiring for 20 bit Accuracy: To protect the high-resolution encoder signal, always use the official Delta pre-assembled encoder cables. The shield must be grounded at the drive’s CN2 connector frame to mitigate RFI (Radio Frequency Interference) from the motor power leads, which could otherwise cause position deviation.