# AutomationDirect GS4-2040

Hardware · `GS4-2040` · verification: source checked

The AutomationDirect GS4-2040 is a 230 VAC AC variable frequency drive in the DURApulse GS4 series. It provides 40 hp with three-phase input or 10 hp with single-phase input and operates in SVC or V/Hz control mode. The unit has a NEMA 1/IP20 enclosure, an RS-485 port, built-in Safe Torque Off, and requires an external dynamic braking unit.

## Specification

| Property | Value |
|---|---|
| Category | vfd |
| Weight | 53.52389966 kg |
| Supply voltage | 230 VAC |
| Frame size | D |
| Output type | PWM output |
| IP rating | IP20 |
| Operating temp min | -10 °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; EU REACH document available.

## Study notes

- Input phases: 3 and 1; output phases: 3.
- Current rating: 114 A with 3-phase input and 33 A with 1-phase input; variable torque rating 115 A.
- Control mode: SVC or V/Hz.
- NEMA 1 enclosure, frame size D, panel or wall mounting.
- RS-485 (RJ12) port supports Modbus RTU, Modbus ASCII, and BACnet up to 115.2k baud.
- Optional EtherNet/IP and Modbus TCP cards available.
- Carrier frequency range 2–15 kHz; output frequency range 0.1–599 Hz.
- Discrete I/O: 8 sinking/sourcing inputs at 24 VDC and 4 relay/sinking/sourcing outputs.
- Analog I/O: 3 current/voltage inputs and 2 current/voltage outputs.
- Programming language: ladder; built-in reverse capability.
- For use with 3-phase induction motors; external dynamic braking unit required.
- Input signal: 4–20 mA, voltage, or potentiometer.

## Sources

1. [DURApulse AC High-performance Drive: 230 VAC, 40hp with 3-phase input, 10hp with 1-phase input, (VFD) (PN# GS4-2040) | AutomationDirect](https://www.automationdirect.com/adc/shopping/catalog/drives_-a-_soft_starters/ac_variable_frequency_drives_(vfd)/high-performance_vfds/gs4-2040) (accessed 2026-10-26)
2. [GS4 2040 cutsheet](https://cdn.automationdirect.com/static/specs/cutsheet/GS4-2040_cutsheet.pdf) (accessed 2026-10-26)

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