# AutomationDirect GS33-2020

Hardware · `GS33-2020` · verification: source checked

The GS33-2020 is a DURApulse GS30 series AC variable frequency drive from AutomationDirect. It is an enclosed 230 VAC, three-phase input drive rated 20 hp, with SVC, V/Hz, FOC, encoder or torque control modes and built-in Safe Torque Off. It provides RS-485 and USB ports, Modbus RTU and Modbus ASCII slave communication, and an IP20 enclosure.

## Specification

| Property | Value |
|---|---|
| Category | vfd |
| Supply voltage | 230 VAC |
| Rated power | 14.914 kW |
| Rated current | 65 A |
| Frame size | F |
| IP rating | IP20 |
| Operating temp min | -20 °C |
| Operating temp max | 50 °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

- Built-in Safe Torque Off (STO).
- UL Listed File # E198015; CE; RoHS compliant.
- User-supplied external fuse required.

## Study notes

- Control modes: SVC, V/Hz, FOC, encoder or torque.
- Carrier frequency range 2–15 kHz; output frequency range 0.1–599 Hz.
- Communication: one RS-485 (RJ45) port and one USB B port; Modbus RTU/ASCII slave up to 115.2k baud.
- I/O: 2 analog inputs, 1 analog output, 7 discrete inputs, and 3 discrete outputs.
- Integrated dynamic braking and built-in reverse capability.
- For use with 3-phase induction and permanent magnet AC motors.
- Frame size F; panel or wall mounting.
- Shipping weight 16.92 lb.
- No integrated EMI filter.
- Variable torque amperage rating 69 A.

## Sources

1. [DURApulse AC High-performance Drive: 230 VAC, 20hp with 3-phase input, (VFD) (PN# GS33-2020) | AutomationDirect](https://www.automationdirect.com/adc/shopping/catalog/drives_-a-_soft_starters/ac_variable_frequency_drives_(vfd)/high-performance_vfds/gs33-2020) (accessed 2026-10-26)
2. [GS33 2020 cutsheet](https://cdn.automationdirect.com/static/specs/cutsheet/GS33-2020_cutsheet.pdf) (accessed 2026-10-26)

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