# AutomationDirect DURApulse GS33-21P0

Hardware · `GS33-21P0` · verification: source checked

The GS33-21P0 is an enclosed DURApulse GS30 series AC variable frequency drive rated 1 hp with a 3-phase, 230 VAC input and output. It controls 3-phase induction and permanent magnet AC motors using SVC, V/Hz, FOC, encoder or torque control modes and includes integrated dynamic braking. Setup and monitoring are done through analog and discrete I/O, an attached keypad, and an RS-485 port running Modbus RTU or ASCII slave.

## Specification

| Property | Value |
|---|---|
| Category | vfd |
| Supply voltage | 230 VAC |
| Frame size | A3 |
| 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 is IP20.
- A user-supplied external fuse is required.
- Operating temperature rating -20 to +50 °C.
- Agency approvals: UL Listed file E198015, CE, and RoHS compliant; no UL Recognized, UL Hazardous or CSA file.

## Study notes

- Rated 1 hp with 3-phase input; amperage rating 5 A, variable torque amperage rating 5.2 A.
- Nominal input and output voltage 230 VAC, 3 input phases and 3 output phases.
- Control modes: SVC, V/Hz, FOC, encoder or torque.
- Communications: (1) RS-485 (RJ45) and (1) USB B; Modbus RTU Slave and Modbus ASCII Slave at up to 115.2k baud.
- Carrier frequency range 2–15 kHz; output frequency range 0.1–599 Hz.
- I/O: 7 discrete inputs at 24 VDC (sinking/sourcing), 3 discrete outputs (relay/sinking/sourcing, one Form C SPDT relay, 240 VAC and 30 VDC), 2 analog inputs (12-bit, 0–20 mA / 4–20 mA, ±10 VDC) and 1 analog output (10-bit, 0–20 mA / 4–20 mA, 0–10 VDC).
- Load current 3 A/point relay, 50 mA/point discrete; spring clamp terminals.
- Mounting on 35 mm DIN rail, panel or wall; frame size A3.
- Integrated dynamic braking; no integrated EMI filter and not internally bypassed.
- Programming language Ladder; GSLOGIC drive PLC software and GSOFT2 configuration software are listed for the drive.
- Optional communication, encoder and I/O modules are available.
- Item shipping weight 2.58 lb; country of origin India.

## Sources

1. [DURApulse AC High-performance Drive: 230 VAC, 1hp with 3-phase input, (VFD) (PN# GS33-21P0) | AutomationDirect](https://www.automationdirect.com/adc/shopping/catalog/drives_-a-_soft_starters/ac_variable_frequency_drives_(vfd)/high-performance_vfds/gs33-21p0) (accessed 2026-10-26)
2. [GS33 21P0 cutsheet](https://cdn.automationdirect.com/static/specs/cutsheet/GS33-21P0_cutsheet.pdf) (accessed 2026-10-26)

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