# AutomationDirect SV2A-4550

Hardware · `SV2A-4550` · verification: source checked

The SV2A-4550 is a SureServo2 AC servo drive rated 5.5 kW on a 460 VAC three-phase input, with a 16.8 A rating and SVPWM output. It controls a servo motor in torque, velocity or position mode using step/direction, CW/CCW, A/B quadrature, internal indexing, or analog torque and velocity commands. Setup is through software and a keypad, and it communicates over a single RS-485 port using Modbus RTU or Modbus ASCII.

## Specification

| Property | Value |
|---|---|
| Category | servo drive |
| Supply voltage | 460 VAC, 3-phase |
| Rated power | 5.5 kW |
| Rated current | 16.8 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

- UL Listed, file # E198015; UL Recognized and UL Hazardous files listed as None.
- CE declaration and EU REACH document provided; RoHS status Yes (see CE doc).
- STO connector (ADC part SV2-CN10-STO) supplied with the drive.

## Study notes

- One RS-485 (RJ45) communication port, Modbus RTU Slave and Modbus ASCII Slave, up to 115.2k baud.
- Command signals: step and direction, CW/CCW, A/B Quad, internal indexing (via discrete input and communication port), torque and velocity via analog input.
- I/O: 10 sinking/sourcing discrete inputs, 6 sinking/sourcing discrete outputs, 2 analog voltage inputs (+/- 10 VDC), 2 analog voltage outputs (+/- 8 VDC).
- Encoder resolution 24-bit (16777216 ppr); encoder output supported.
- Internal protection functions: overcurrent, overvoltage, undervoltage, over-temperature, regeneration error, overload, velocity/position error, encoder error, secondary encoder position error, communication error, short circuit.
- For use with 4.5 kW and 5.5 kW systems.
- Optional EtherNet/IP and Modbus TCP cards available; these protocols are not on the standard unit.
- Enclosed housing, panel mounting, 0 to 55 deg C temperature rating.
- Item shipping weight 13.45 lb; country of origin Taiwan.

## Sources

1. [Servo Drive: Modbus RTU and ASCII, 5.5 kW, 460 VAC, 3-phase (PN# SV2A-4550) | AutomationDirect](https://www.automationdirect.com/adc/shopping/catalog/motion_control/sureservo2_(sv2a_series)_servo_systems/460v_servo_motors,_drives,_motor_cables/sv2a-4550) (accessed 2026-10-26)
2. [SV2A 4550 cutsheet](https://cdn.automationdirect.com/static/specs/cutsheet/SV2A-4550_cutsheet.pdf) (accessed 2026-10-26)

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