# AutomationDirect DURApulse GS23-21P0

Hardware · `GS23-21P0` · verification: source checked

The GS23-21P0 is an enclosed DURApulse GS20 series general-purpose AC variable frequency drive from AutomationDirect. It takes 230 VAC input and produces three-phase output, rated 1 hp with three-phase input or 1/2 hp with single-phase input. It supports SVC, V/Hz, FOC and torque control modes, communicates over an RS-485 port using Modbus RTU or Modbus ASCII, and includes integrated dynamic braking.

## Specification

| Property | Value |
|---|---|
| Category | vfd |
| Weight | 1.202 kg |
| Supply voltage | 230 VAC |
| Rated current | 4.8 A |
| Frame size | A5 |
| 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) is built-in.
- Enclosure IP rating IP20; operating temperature rating -20 to +50 deg C.
- UL Listed, file # E198015; CE declaration available; RoHS status Yes.
- Fuse type is user-supplied external fuse.

## Study notes

- Control modes: SVC, V/Hz, FOC or torque.
- Amperage rating is 4.8 A with 3-phase input and 2.4 A with 1-phase input; variable torque rating is 5 A.
- Output frequency range 0.1-599 Hz; carrier frequency range 2-15 kHz.
- Discrete I/O: 7 inputs (24 VDC, sinking/sourcing) and 3 outputs (relay/sinking/sourcing, 240 VAC and 48 VDC); relay output is one Form C (SPDT).
- Analog I/O: 2 input channels (0-20 mA, 4-20 mA, +/-10 VDC; 10-bit and 12-bit) and 1 output channel (0-20 mA, 4-20 mA, 0-10 VDC; 10-bit).
- Communication ports: one RS-485 (RJ45) and one USB B; Modbus RTU Slave and Modbus ASCII Slave at up to 115.2k baud.
- Optional EtherNet/IP and Modbus TCP card available; an EDS file and Rockwell AOI files are provided for the card.
- Frame size A5; panel or wall mounting; spring clamp terminals; ladder programming language.
- No integrated EMI filter and drive is not internally bypassed.
- Input signal options: 4-20 mA, voltage, potentiometer or pulse train input; output type PWM.
- For use with 3-phase induction and permanent magnet AC motors.
- Item shipping weight 2.65 lb; country of origin India.

## Sources

1. [DURApulse AC General Purpose Drive: 230 VAC, 1hp with 3-phase input, 1/2hp with 1-phase input, (VFD) (PN# GS23-21P0) | AutomationDirect](https://www.automationdirect.com/adc/shopping/catalog/drives_-a-_soft_starters/ac_variable_frequency_drives_(vfd)/general_purpose_vfds/gs23-21p0) (accessed 2026-10-26)
2. [GS23 21P0 cutsheet](https://cdn.automationdirect.com/static/specs/cutsheet/GS23-21P0_cutsheet.pdf) (accessed 2026-10-26)

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