# AutomationDirect GS4-2075

Hardware · `GS4-2075` · verification: source checked

The GS4-2075 is a DURApulse GS4 series AC variable frequency drive in an open-frame E frame. It accepts 230 VAC input, with ratings of 75 hp for 3-phase input and 20 hp for 1-phase input, and uses SVC or V/Hz control. It provides an RS-485 port for Modbus RTU, Modbus ASCII and BACnet communication, and optional EtherNet/IP and Modbus TCP cards are available.

## Specification

| Property | Value |
|---|---|
| Category | vfd |
| Supply voltage | 230 VAC |
| Frame size | E |
| Output type | PWM output |
| 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 declaration; RoHS compliant.
- No UL Recognized, UL Hazardous or CSA file number is stated.
- IP rating is stated as IP00 and IP20.
- User-supplied external fuse required.

## Study notes

- Input and output voltage are 230 VAC; input accepts 3-phase or 1-phase, output is 3-phase.
- Power rating is 75 hp with 3-phase input and 20 hp with 1-phase input.
- Current rating is 204 A with 3-phase input and 65 A with 1-phase input; variable torque rating is 215 A.
- Control mode is SVC or V/Hz.
- Integrated EMI filter: no.
- RS-485 (RJ12) port supports Modbus RTU, Modbus ASCII and BACnet at up to 115.2k baud.
- Optional EtherNet/IP and Modbus TCP cards are available.
- External dynamic braking unit required.
- Carrier frequency range is 2–15 kHz; output frequency range is 0.1–599 Hz.
- I/O includes 3 analog inputs, 2 analog outputs, 8 discrete inputs and 4 discrete outputs.
- Discrete outputs include two Form C (SPDT) relays; load current is 3 A/point relay and 50 mA/point discrete.
- Programming language is ladder; the unit is open-frame and wall-mounted.

## Sources

1. [DURApulse AC High-performance Drive: 230 VAC, 75hp with 3-phase input, 20hp with 1-phase input, (VFD) (PN# GS4-2075) | AutomationDirect](https://www.automationdirect.com/adc/shopping/catalog/drives_-a-_soft_starters/ac_variable_frequency_drives_(vfd)/high-performance_vfds/gs4-2075) (accessed 2026-10-26)
2. [GS4 2075 cutsheet](https://cdn.automationdirect.com/static/specs/cutsheet/GS4-2075_cutsheet.pdf) (accessed 2026-10-26)

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