# AutomationDirect GS4-4100

Hardware · `GS4-4100` · verification: source checked

The GS4-4100 is a DURApulse GS4 series AC high-performance variable frequency drive rated 100 hp with 460 VAC three-phase input. It controls three-phase induction motors in sensorless vector (SVC) or V/Hz mode and has an RS-485 (RJ12) port for Modbus RTU, Modbus ASCII or BACnet. The open-frame D-frame unit is panel or wall mounted and includes a built-in keypad, ladder-logic programming and Safe Torque Off.

## Specification

| Property | Value |
|---|---|
| Category | vfd |
| Weight | 58.967 kg |
| Supply voltage | 460 VAC |
| Rated power | 74.57 kW |
| Rated current | 143 A |
| Frame size | D |
| Output type | PWM output |
| Operating temp min | -10 °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.
- A user-supplied external fuse is required.
- An external dynamic braking unit is required; the drive is not internally bypassed.
- Operating temperature range is -10 to +50 °C.
- The drive is open frame (IP00) construction.
- Only 3-phase induction motors are listed as the intended load.

## Study notes

- Control mode is SVC (sensorless vector control) or V/Hz.
- Input and output are both three-phase at 460 VAC nominal.
- Amperage rating is 143 A; variable torque amperage rating is 150 A.
- RS-485 (RJ12) port runs Modbus RTU, Modbus ASCII and BACnet at up to 115.2k baud.
- BACnet is named in the document but has no matching protocol entry in this reference list.
- Optional EtherNet/IP and Modbus TCP cards are available; an EDS file and a Rockwell AOI are provided for the EtherNet/IP card.
- Enclosure is open frame; IP ratings are stated as IP00 and IP20.
- Output frequency range 0.1-599 Hz; carrier frequency range 2-15 kHz.
- Analog I/O: 3 input channels (11-bit resolution) and 2 output channels (10-bit resolution).
- Discrete I/O: 8 sinking/sourcing 24 VDC inputs and 4 relay/sinking/sourcing outputs (Form C SPDT relays).
- Embedded PLC is programmed in ladder (GSLOGIC software); drive configuration uses GSOFT2.
- Shipping weight is listed as 130 lb; agency compliance is UL Listed File E198015, CE and RoHS.

## Sources

1. [DURApulse AC High-performance Drive: 460 VAC, 100hp with 3-phase input, (VFD) (PN# GS4-4100) | AutomationDirect](https://www.automationdirect.com/adc/shopping/catalog/drives_-a-_soft_starters/ac_variable_frequency_drives_(vfd)/high-performance_vfds/gs4-4100) (accessed 2026-10-26)
2. [GS4 4100 cutsheet](https://cdn.automationdirect.com/static/specs/cutsheet/GS4-4100_cutsheet.pdf) (accessed 2026-10-26)

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