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AutomationDirect GS21-11P0

The GS21-11P0 is a DURApulse GS20 series general purpose AC variable frequency drive in an enclosed C-frame housing, mounted on a panel or wall. It takes single-phase 120 VAC input and drives three-phase induction or permanent magnet AC motors with 230 VAC output at 1 hp. It supports SVC, V/Hz, FOC or torque control modes, has integrated dynamic braking, and communicates over RS-485 using Modbus RTU or Modbus ASCII slave.

Source checked12/12 values · 2026-10-26AutomationDirectVFD
Rated power
0.7457kW
Rated current
4.8A
IP rating
IP20
Weight
1.4969kg

Specification

2 sources
Categoryvfd
Supply voltage120 VAC
Frame sizeC
Output typePWM output
Operating temp min-20 °C
Operating temp max50 °C

Quick answers

How much does the AutomationDirect GS21-11P0 weigh?
1.49685 kg, per DURApulse AC General Purpose Drive: 120 VAC, 1hp with 1-phase input, (VFD) (PN# GS21-11P0) | AutomationDirect (automationdirect.com).
What is the IP rating of the AutomationDirect GS21-11P0?
IP20, per DURApulse AC General Purpose Drive: 120 VAC, 1hp with 1-phase input, (VFD) (PN# GS21-11P0) | AutomationDirect (automationdirect.com).

Study notes

  • Series GS20; controller type general purpose; enclosed housing, panel or wall mounting.
  • Input is 1-phase 120 VAC; output is 3-phase 230 VAC.
  • Control modes: SVC, V/Hz, FOC or torque. Reverse capability is built-in.
  • Variable torque amperage rating 5.5 A; output frequency range 0.1-599 Hz; carrier frequency range 2-15 kHz.
  • Communication: (1) RS-485 (RJ45) and (1) USB B port, up to 115.2k baud, Modbus RTU Slave and Modbus ASCII Slave.
  • I/O: 7 discrete inputs (24 VDC, sinking/sourcing), 3 discrete outputs (relay/sinking/sourcing, one Form C SPDT relay), 2 analog inputs (current/voltage, 10-bit and 12-bit), 1 analog output (10-bit).
  • Input signal options: 4-20 mA, voltage, potentiometer or pulse train. Analog input ranges 0-20 mA / 4-20 mA and +/-10 VDC; analog output ranges 0-20 mA / 4-20 mA and 0-10 VDC.
  • Integrated dynamic braking; no integrated EMI filter; not internally bypassed.
  • Optional EtherNet/IP and Modbus TCP card available; EtherNet/IP and Modbus TCP are not built in.
  • Programming language: ladder. Connector type: spring clamp terminals. Fuse type: user-supplied external fuse.
  • Discrete output load current 3 A/point relay, 50 mA/point discrete.
  • Item shipping weight 3.3 lb.

Safety

  • Safe Torque Off (STO) is built-in.
  • Enclosure rating IP20; temperature rating -20 to +50 deg C.
  • A user-supplied external fuse is required.
  • UL Listed file # E198015; RoHS status Yes (see CE document); CE declarations available. No UL Recognized, UL Hazardous, or CSA file listed.
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