DELTA ASD-A2-0721-M Servo Drive

Delta ASDA-A2 series high-performance general-purpose servo drive with 750W (0.75kW) rated power, universal 220V AC single/three-phase input, and standard pulse command type (M). It is compatible with 20-bit high-resolution servo motors and is suitable for high-precision positioning and speed control motion applications in industrial automation.

1. Complete Model Breakdown (Standard Format: ASD-A2-0721-M)

2. Key Technical Parameters (ASD-A2-0721-M)

3. Core Features

3.1 High-Precision Control

20-bit high-resolution encoder: Positioning accuracy up to ±0.001°, smooth low-speed operation without jitter

Auto vibration suppression filter: 2 built-in damping filters to automatically compensate mechanical resonance and improve machining accuracy

Full closed-loop control (selected models): Supports external linear scales / encoders for ultra-high precision positioning

3.2 Flexible Motion Control

Electronic CAM (E-CAM): Up to 720 CAM points with smooth interpolation, replacing mechanical cams and reducing maintenance

Built-in gantry control: Supports dual-axis synchronous control for large machine tools and gantry machining centers

Multi-mode switching: Seamless switching between position / speed / torque modes for complex motion tasks

3.3 Safety & Communication

STO (Safe Torque Off): Complies with EN 61800-5-2 for safe stop control

CANopen (standard on M type): 1Mbps baud rate, supports DS301/DS402 for multi-axis networking

Modbus RTU: Parameter configuration and monitoring via RS-485

4. Matching Motors & Installation

4.1 Compatible Servo Motors (Delta ECMA Series)

4.2 Installation Notes

1. DIN rail mounting: Standard 35mm rail, 45mm width, with sufficient heat dissipation space
2. Wiring rules:

L1/L2/L3: Three-phase power input (single-phase to L1/L2)

U/V/W: Servo motor output

A1/A2: Control power input (24V DC)

PULSE/DIR: Pulse command input (for PLC/CNC)

3. Grounding requirement: Drive PE terminal must be reliably grounded with resistance ≤1Ω to prevent interference and electric shock
4. Typical Applications

6. Comparison of Models in the Same Series (A2 Series, 220V Class)

7. Cross-Brand Replacement Models

8. Selection & Replacement Guidelines
9. Power matching: Calculate required load power; 750W suits 0.5~1kW loads (1.2~1.5x safety factor recommended)
10. Voltage confirmation: 220V single/three-phase input matches common factory power without extra transformers
11. Control requirements:

Pulse type (M): For PLC/CNC/motion controllers, general-purpose choice

Fieldbus type (E/F): For multi-axis synchronization and high-speed communication

4. Replacement suggestions:

Delta internal upgrade: A2 → A3 (economical, fully compatible)

Cross-brand replacement: Match power, voltage, control mode, output current; note terminal layout and parameter differences

ASD-A2-0721-M is a high-performance 750W servo drive in Delta’s A2 series with 220V single/three-phase input and pulse command control. Featuring a 20-bit high-resolution encoder, 400Hz frequency response, and flexible motion functions, it is ideal for high-precision positioning and speed control in most small-to-medium industrial automation equipment, making it a top choice for general-purpose servo solutions.

Delta Servo Drive Model List & Cross-Brand Comparison Overview

1. Complete Delta Servo Drive Model List (By Product Line)

1.1 High-End Servo Systems

ASDA-A3 Series (High-Performance Motion Control)

ASDA-W3 Series (Common DC Bus Multi-Axis)

Power range: 1kW~7.5kW, 380V three-phase input, multi-axis synchronization

Typical models: ASD-W3-0103-F<br>ASD-W3-0203-F<br>ASD-W3-0303-F

ASDA-H3 Series (Ultra-High Power Multi-Axis)

Power range: 5kW~22kW, 380V three-phase input, modular design

Typical models: ASD-H3-0503-F<br>ASD-H3-1003-F<br>ASD-H3-2203-F

1.2 Advanced General-Purpose

ASDA-A2 Series (High Performance, 20-bit encoder)

ASDA-M Series (Medium Load Dedicated)

Power range: 750W~3kW, 220V/380V optional

Typical models: ASD-M-0721-M<br>ASD-M-1023-F

1.3 Standard General-Purpose

ASDA-B3 Series (Economical High Performance, 3.1kHz response)

ASDA-B2 Series (Classic Economy, gradually replaced by B3)

Power range: 100W~3kW, 220V/380V optional

Typical models: ASD-B2-0421-B<br>ASD-B2-0721-B<br>ASD-B2-1023-B (B: Basic type)

ASDA-E3 Series (Basic Function, Cost-Effective)

1.4 Special Series

ASDA-A2R Series: Simplified A2, discontinued; upgrade to A3 recommended

ASDA-AB Series: Early economy, discontinued; upgrade to B3 recommended

2. Delta Servo Drive Naming Convention

Standard format: ASD-XX-YYZZ-□

ASD: AC Servo Drive (Delta universal prefix)

XX: Series code (A2/A3/B2/B3/E3/M/W3/H3)

YY: Power code (01=100W, 02=200W, 04=400W, 07=750W, 10=1kW, 15=1.5kW)

ZZ: Voltage code (21=220V 1φ/3φ, 23=220V 3φ, 33=380V 3φ)

□: Control type (M: Pulse, L: Pulse+Analog, F: EtherCAT, W: CANopen, E: Economy)

3. Delta Servo Drive Cross-Brand Comparison (Mainstream Models)

4. Selection & Replacement Principles
5. Power matching: Ensure rated power ≥ original load; 1.2~1.5x safety factor recommended
6. Voltage compatibility: Match input voltage class (220V/380V, single/three-phase)
7. Control mode:

Pulse type (M): For PLC/CNC and general motion control

Fieldbus type (F/W): For multi-axis and high-speed networking

Analog type (L): For continuous speed/torque regulation

4. Performance upgrade path:

Delta internal: B2 → B3 → A3 → W3/H3

Cross-brand: Match performance level; pay attention to wiring and parameter setup

Delta servo drives cover a full power range from 100W to 22kW, graded by performance: E3 → B3 → A2 → A3 → M → W3/H3. They satisfy all industrial automation scenarios from basic positioning to high-end motion control. For cross-brand replacement, focus on matching power, voltage, and control mode to ensure stable system operation.