# AutomationDirect DURApulse GS21-23P0

Hardware · `GS21-23P0` · verification: source checked

The GS21-23P0 is an enclosed DURApulse GS20 series general-purpose AC variable frequency drive. It runs from a single-phase 230 VAC supply and produces a three-phase output for induction or permanent magnet AC motors, rated 3 hp. Control modes are SVC, V/Hz, FOC and torque, and the drive includes an RS-485 port, a USB B port and integrated dynamic braking.

## Specification

| Property | Value |
|---|---|
| Category | vfd |
| Weight | 1.5875733 kg |
| Supply voltage | 230 VAC |
| Rated current | 11 A |
| Frame size | C |
| 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 is IP20, so it must be installed in a suitable enclosure for most environments.
- A user-supplied external fuse is required.
- Agency approvals: UL Listed file E198015, CE, RoHS. No UL Recognized, UL Hazardous or CSA file is listed.
- Operating temperature rating -20 to +50 deg C.

## Study notes

- Supply is 1-phase 230 VAC; output is 3-phase 230 VAC.
- Amperage rating 11 A; variable torque amperage rating 12.5 A.
- Output frequency range 0.1-599 Hz; carrier frequency range 2-15 kHz.
- Control modes: SVC, V/Hz, FOC or torque. Built-in reverse capability.
- Communication: (1) RS-485 (RJ45) and (1) USB B, up to 115.2k baud; port protocols Modbus RTU Slave and Modbus ASCII Slave.
- EtherNet/IP and Modbus TCP are available only through an optional card, not built in.
- I/O: 7 discrete inputs at 24 VDC (sinking/sourcing), 3 discrete outputs (one Form C SPDT relay) rated 3 A/point relay and 50 mA/point discrete.
- Analog: 2 input channels (0-20 mA and 4-20 mA, +/-10 VDC, 10-bit and 12-bit resolution) and 1 output channel (0-20 mA and 4-20 mA, 0-10 VDC, 10-bit).
- Programming language is ladder; configuration via GSOFT2 software.
- Connector type is spring clamp terminals; mounting is panel or wall.
- Integrated EMI filter: No. Internally bypassed: No.

## Sources

1. [DURApulse AC General Purpose Drive: 230 VAC, 3hp with 1-phase input, (VFD) (PN# GS21-23P0) | AutomationDirect](https://www.automationdirect.com/adc/shopping/catalog/drives_-a-_soft_starters/ac_variable_frequency_drives_(vfd)/general_purpose_vfds/gs21-23p0) (accessed 2026-10-26)
2. [GS21 23P0 cutsheet](https://cdn.automationdirect.com/static/specs/cutsheet/GS21-23P0_cutsheet.pdf) (accessed 2026-10-26)

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