Product Overview

The ASD-A2-1521-L (ASDA21521L) is a high-capacity, precision AC Servo Drive from Delta’s advanced ASDA-A2 series. Delivering a robust 1.5 kW of rated output power, this drive is designed for high-inertia and high-torque applications within a 220 V single-phase or three-phase power environment. The "L" model type is a specialized variant that emphasizes Pulse Train Control and Analog Voltage Control, making it the primary choice for integration with high-speed PLCs and CNC controllers. Featuring 20-bit encoder feedback and integrated vibration suppression, the ASD-A2-1521-L is ideal for heavy-duty industrial machinery such as large-scale CNC milling, high-speed pick-and-place robots, and automated food processing lines.

Technical Configuration

The hardware architecture of the ASD-A2-1521-L is engineered to provide extreme smoothness and positioning accuracy. It supports a 20-bit high-resolution encoder (1,280,000 pulses/rev), which is essential for maintaining stability at low speeds and achieving sub-micron precision. The "L" type configuration focuses on high-speed pulse inputs (up to 4 Mbps via line driver) for rapid position commanding. Additionally, the drive features a built-in Electronic Cam (E-CAM) function, allowing for complex motion profiles—such as rotary shears or flying cut-offs—to be executed internally, reducing the processing load on the master controller.

Technical Specifications

Technical FAQs

Can I run the ASD-A2-1521-L on a single-phase 220V supply?Yes. While 1.5 kW drives are often used with three-phase power for better efficiency, this model is rated for 220V single-phase input. However, ensure that your power supply and wiring are rated for the higher input current associated with single-phase operation to prevent voltage sag during rapid acceleration.

What is the benefit of the "L" type over other ASDA-A2 models?The "L" type is optimized for traditional control architectures that rely on pulse-train signals or analog ±10V commands. Unlike the "E" (EtherCAT) or "M" (CANopen) models, the "L" type is specifically built to interface with the high-speed pulse outputs found on most standard PLCs (like the Delta DVP-EH3 series).

Does this drive support full-closed loop control?Yes. The ASDA-A2 series, including the 1.5 kW "L" model, supports full-closed loop control. By connecting an external linear scale or encoder to the CN6 port, the drive can compensate for mechanical errors such as gear backlash or belt stretch, ensuring the load—not just the motor—is in the correct position.

Engineering & Installation Guide

• Heat Dissipation: At 1.5 kW, the drive generates more heat than smaller 400W or 750W units. Ensure the drive is mounted vertically on a metal backplate and maintain at least 50 mm of vertical clearance and 20 mm of horizontal clearance for optimal airflow.

• Wiring for High-Speed Pulses: When using the maximum pulse frequency for high-speed positioning, use shielded twisted-pair cables for the Pulse/Direction signals. Connect the shield to the drive’s ground to prevent electromagnetic interference (EMI) from causing "lost steps."

• Braking Resistor: For applications involving high-inertia loads or rapid deceleration, the internal regenerative resistor may not be sufficient. Monitor the "Overvoltage" (AL005) fault; if it occurs during stopping, install an external braking resistor across the B1 and B2 terminals.