# AutomationDirect GS33-4050

Hardware · `GS33-4050` · verification: source checked

The AutomationDirect GS33-4050 is a DURApulse GS30 series enclosed AC variable frequency drive. It accepts 460 VAC three-phase input and drives three-phase induction or permanent magnet AC motors at up to 50 hp, using SVC, V/Hz, FOC, encoder or torque control modes. It provides RS-485 and USB B ports and supports Modbus RTU and Modbus ASCII slave communication.

## Specification

| Property | Value |
|---|---|
| Category | vfd |
| Supply voltage | 460 VAC |
| Rated power | 37.2849936 kW |
| Rated current | 75 A |
| Frame size | H |
| Output type | PWM output |
| 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).
- IP20 enclosure; operating temperature range is -20 to +50 °C.
- External dynamic braking unit required.
- User-supplied external fuse required.
- UL Listed File # E198015; RoHS compliant; CE declarations available.

## Study notes

- Input and output are both 3-phase.
- Amperage rating is 75 A; variable torque amperage rating is 85 A.
- Control modes are SVC, V/Hz, FOC, encoder or torque.
- Communication ports are one RS-485 (RJ45) and one USB B; port speed is up to 115.2k baud.
- Output frequency range is 0.1–599 Hz; carrier frequency range is 2–15 kHz.
- Discrete I/O includes 7 inputs and 3 outputs; analog I/O includes 2 inputs and 1 output.
- Programming language is ladder; connector type is spring clamp terminals.
- For use with 3-phase induction and permanent magnet AC motors.
- Optional communication, encoder and I/O modules are available.
- No integrated EMI filter; mounting is panel or wall.

## Sources

1. [DURApulse AC High-performance Drive: 460 VAC, 50hp with 3-phase input, (VFD) (PN# GS33-4050) | AutomationDirect](https://www.automationdirect.com/adc/shopping/catalog/drives_-a-_soft_starters/ac_variable_frequency_drives_(vfd)/high-performance_vfds/gs33-4050) (accessed 2026-10-26)
2. [GS33 4050 cutsheet](https://cdn.automationdirect.com/static/specs/cutsheet/GS33-4050_cutsheet.pdf) (accessed 2026-10-26)

---

Source page: https://machineschema.com/hardware/automationdirect-gs33-4050  
JSON: https://machineschema.com/hardware/automationdirect-gs33-4050.json  
License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Cite Machine Schema and the original sources.