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AutomationDirect DURApulse GS4-4020

The GS4-4020 is a DURApulse GS4 series AC variable frequency drive rated for 20 hp on a 460 VAC three-phase input. It runs three-phase induction motors in either sensorless vector (SVC) or V/Hz mode, with an output frequency range of 0.1 to 599 Hz and integrated dynamic braking. It provides 8 discrete inputs, 4 discrete outputs and analog I/O, plus an RS-485 port using Modbus RTU, Modbus ASCII or BACnet.

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

Specification

2 sources
Categoryvfd
Supply voltage460 VAC
Frame sizeB
Output typePWM output
Operating temp min-10 °C
Operating temp max50 °C

Quick answers

What is the IP rating of the AutomationDirect DURApulse GS4-4020?
IP20, per DURApulse AC High-performance Drive: 460 VAC, 20hp with 3-phase input, (VFD) (PN# GS4-4020) | AutomationDirect (automationdirect.com).

Study notes

  • Series GS4, high-performance controller type; enclosure NEMA 1, panel or wall mounting, frame size B.
  • Rated 20 hp with 3-phase input; amperage rating 30 A, variable torque rating 32 A; 460 VAC nominal input and output.
  • Control mode is SVC or V/Hz; carrier frequency 2-15 kHz; output frequency range 0.1-599 Hz.
  • Digital I/O: 8 discrete inputs at 24 VDC (sinking/sourcing) and 4 discrete outputs rated 240 VAC and 48 VDC (relay/sinking/sourcing), with 2 Form C (SPDT) relays.
  • Analog I/O: 3 input channels (current/voltage, 11-bit, 0-20 mA and 4-20 mA, +/-10 VDC) and 2 output channels (10-bit, 0-20 mA and 4-20 mA, 0-10 VDC).
  • 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; no integrated EMI filter; not internally bypassed.
  • Reverse capability is built in; programming language is ladder logic (GSLOGIC drive PLC software and GSOFT2 configuration software).
  • Shipping weight is 15.5 lb (about 7.03 kg); country of origin India.

Safety

  • Safe Torque Off (STO) is built-in.
  • IP20 rating with NEMA 1 enclosure.
  • Operating temperature rating -10 to +50 degrees C.
  • UL Listed File # E198015; RoHS status yes (see CE declaration); no CSA file listed.
  • A user-supplied external fuse is required.
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