# AutomationDirect SV2A-4040

Hardware · `SV2A-4040` · verification: source checked

The SV2A-4040 is a SureServo2 series AC servo drive rated 400 W, fed from a 460 VAC three-phase supply. It controls a servo motor in torque, velocity or position mode, accepting step/direction, CW/CCW, A/B quadrature, internal indexing and analog command signals. It communicates over one RS-485 (RJ45) port using Modbus RTU or Modbus ASCII, and is configured by software or keypad.

## Specification

| Property | Value |
|---|---|
| Category | servo drive |
| Supply voltage | 460 VAC, 3-phase |
| Rated power | 0.4 kW |
| Rated current | 1.5 A |
| Feedback | 24-bit (16777216 ppr) |
| Output type | SVPWM output |
| IP rating | IP20 |
| Operating temp min | 0 °C |
| Operating temp max | 55 °C |

## Connected

- Manufacturer: [AutomationDirect](https://machineschema.com/manufacturer/automationdirect.md)
- Protocols: [MODBUS ASCII](https://machineschema.com/protocol/modbus-ascii.md), [MODBUS RTU](https://machineschema.com/protocol/modbus-rtu.md)

## Safety

- Protection functions stated: overcurrent, overvoltage, undervoltage, over-temperature, regeneration error, overload, velocity/position error, encoder error, secondary encoder position error, communication error and short circuit.
- Enclosure is IP20, so it must be installed in a protected panel environment.
- UL Listed File # E198015; CE marked; RoHS status Yes.

## Study notes

- Rated 1.5 A input current with SVPWM output.
- Encoder resolution is 24-bit (16777216 ppr); encoder output is provided.
- RS-485 (RJ45) port runs at up to 115.2k baud.
- I/O: 10 discrete inputs, 6 discrete outputs (sinking/sourcing), 2 analog input channels (+/- 10 VDC) and 2 analog output channels (+/- 8 VDC).
- Tuning modes: easy/auto (4 methods) and manual.
- Command signals: step and direction, CW/CCW, A/B quad, internal indexing via discrete input and communication port, torque and velocity via analog input.
- Configuration via software and keypad.
- EtherNet/IP and Modbus TCP are available only as optional cards, not built in.

## Sources

1. [Servo Drive: Modbus RTU and ASCII, 400W, 460 VAC, 3-phase (PN# SV2A-4040) | AutomationDirect](https://www.automationdirect.com/adc/shopping/catalog/motion_control/sureservo2_(sv2a_series)_servo_systems/460v_servo_motors,_drives,_motor_cables/sv2a-4040) (accessed 2026-10-26)
2. [SV2A 4040 cutsheet](https://cdn.automationdirect.com/static/specs/cutsheet/SV2A-4040_cutsheet.pdf) (accessed 2026-10-26)

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