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AutomationDirect GS4-21P0

The GS4-21P0 is a DURApulse GS4 series AC high-performance variable frequency drive in a NEMA 1 enclosure. It operates from 230 VAC with either 3-phase or 1-phase input and provides 1 hp or 1/2 hp respectively. It supports SVC or V/Hz control, has an RS-485 port, and includes integrated dynamic braking.

Source checked9/9 values · 2026-10-26AutomationDirectVFD
IP rating
IP20

Specification

2 sources
Categoryvfd
Supply voltage230 VAC
Frame sizeA
Output typePWM output
Operating temp min-10 °C
Operating temp max50 °C

Quick answers

What is the IP rating of the AutomationDirect GS4-21P0?
IP20, per DURApulse AC High-performance Drive: 230 VAC, 1hp with 3-phase input, 1/2hp with 1-phase input, (VFD) (PN# GS4-21P0) | AutomationDirect (automationdirect.com).

Study notes

  • Input phases: 3 and 1; output phases: 3.
  • Horsepower: 1 hp with 3-phase input, 1/2 hp with 1-phase input.
  • Amperage: 4.8 A with 3-phase input, 2.4 A with 1-phase input; variable torque rating 5 A.
  • Control modes: SVC or V/Hz.
  • 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.
  • Input signal: 4–20 mA, voltage, or potentiometer input.
  • Output frequency range: 0.1–599 Hz; carrier frequency range: 2–15 kHz.
  • 8 discrete inputs (24 VDC, sinking/sourcing); 4 discrete outputs (relay/sinking/sourcing).
  • 3 analog inputs (11-bit) and 2 analog outputs (10-bit).
  • Integrated dynamic braking and built-in reverse capability.
  • For use with 3-phase induction motors; programming language: ladder; screw terminals.

Safety

  • Built-in Safe Torque Off (STO) function.
  • UL Listed, file E198015.
  • CE marked and RoHS compliant; EU REACH documentation available.
  • Rated ambient temperature range: -10 to +50 °C.
  • External fuse is user-supplied.
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