# AutomationDirect DURApulse GS23-4020

Hardware · `GS23-4020` · verification: source checked

The DURApulse GS23-4020 is an enclosed AC general purpose variable frequency drive for 3-phase 460 VAC input, rated 20 hp. It supports SVC, V/Hz, FOC and torque control modes, includes RS-485 Modbus RTU/ASCII communication, integrated dynamic braking and built-in Safe Torque Off (STO). An optional card adds EtherNet/IP and Modbus TCP.

## Specification

| Property | Value |
|---|---|
| Category | vfd |
| Weight | 5.0349 kg |
| Supply voltage | 460 VAC |
| Rated power | 14.914 kW |
| Frame size | E |
| 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

- Safe Torque Off (STO) built-in.
- UL Listed File # E198015; CE; RoHS compliant.
- Operating temperature range -20 to +50 °C.
- User-supplied external fuse required.

## Study notes

- Control modes: SVC, V/Hz, FOC or torque.
- Input: 3-phase 460 VAC, 32 A rated; 36 A variable torque.
- Output frequency range 0.1–599 Hz; carrier frequency 2–15 kHz.
- Communication: RS-485 (RJ45) and USB B; Modbus RTU/ASCII slave up to 115.2k baud.
- Optional EtherNet/IP and Modbus TCP card available.
- Discrete I/O: 7 inputs (24 VDC sinking/sourcing), 3 outputs (relay/sinking/sourcing).
- Analog I/O: 2 inputs (current/voltage), 1 output (current/voltage).
- Integrated dynamic braking; built-in reverse capability.
- Programming language: Ladder.
- For use with 3-phase induction and permanent magnet AC motors.
- Frame size E; panel or wall mounting.

## Sources

1. [DURApulse AC General Purpose Drive: 460 VAC, 20hp with 3-phase input, (VFD) (PN# GS23-4020) | AutomationDirect](https://www.automationdirect.com/adc/shopping/catalog/drives_-a-_soft_starters/ac_variable_frequency_drives_(vfd)/general_purpose_vfds/gs23-4020) (accessed 2026-10-26)
2. [GS23 4020 cutsheet](https://cdn.automationdirect.com/static/specs/cutsheet/GS23-4020_cutsheet.pdf) (accessed 2026-10-26)

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