# AutomationDirect GS4-2025

Hardware · `GS4-2025` · verification: source checked

The DURApulse GS4-2025 is a 230 VAC high-performance variable frequency drive for three-phase induction motors. It provides SVC or V/Hz control, integrated dynamic braking, RS-485 communications for Modbus RTU, Modbus ASCII and BACnet, and a built-in Safe Torque Off function. Optional EtherNet/IP and Modbus TCP cards can be added.

## Specification

| Property | Value |
|---|---|
| Category | vfd |
| Supply voltage | 230 VAC |
| Frame size | C |
| 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) safety function.
- UL Listed File # E198015.
- CE declaration available; RoHS status: Yes.
- EU REACH document available.
- User-supplied external fuse required.

## Study notes

- Input phases: 3 and 1; output phases: 3.
- Horsepower by input phase: 25 hp with 3-phase input, 10 hp with 1-phase input.
- Amperage rating: 71 A with 3-phase input and 33 A with 1-phase input; variable torque amperage rating 75 A.
- Control mode: SVC or V/Hz; carrier frequency range 2–15 kHz; output frequency range 0.1–599 Hz.
- RS-485 (RJ12) port supports speeds up to 115.2k baud; BACnet is listed as a port protocol but has no matching protocol id in the reference list.
- Optional EtherNet/IP and Modbus TCP cards are available.
- Analog I/O: 3 analog input channels (11-bit resolution) and 2 analog output channels (10-bit resolution).
- Discrete I/O: 8 discrete input points at 24 VDC and 4 discrete output points rated 240 VAC and 48 VDC.
- Input signal: 4–20 mA, voltage or potentiometer input; output type: PWM output.
- Reverse capability is built in; integrated EMI filter: no; internally bypassed: no.
- Mounting: panel or wall.
- Item shipping weight: 26.8 lb.

## Sources

1. [DURApulse AC High-performance Drive: 230 VAC, 25hp with 3-phase input, 10hp with 1-phase input, (VFD) (PN# GS4-2025) | AutomationDirect](https://www.automationdirect.com/adc/shopping/catalog/drives_-a-_soft_starters/ac_variable_frequency_drives_(vfd)/high-performance_vfds/gs4-2025) (accessed 2026-10-26)
2. [GS4 2025 cutsheet](https://cdn.automationdirect.com/static/specs/cutsheet/GS4-2025_cutsheet.pdf) (accessed 2026-10-26)

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