# AutomationDirect GS4-4250

Hardware · `GS4-4250` · verification: source checked

The GS4-4250 is a DURApulse GS4 series AC variable frequency drive in an open-frame, wall-mount housing. It takes 460 VAC three-phase input and is rated 250 hp with 3-phase input, using either sensorless vector control (SVC) or V/Hz control to drive three-phase induction motors. It provides RS-485 communications, analog and discrete I/O, and an embedded ladder-logic PLC function.

## Specification

| Property | Value |
|---|---|
| Category | vfd |
| Weight | 171 kg |
| Supply voltage | 460 VAC |
| Rated current | 352 A |
| Frame size | G |
| 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.
- Open-frame enclosure, IP00 and IP20, wall mounting; must be installed in an appropriate enclosure environment.
- An external dynamic braking unit is required.
- A user-supplied external fuse is required.
- Operating temperature rating -10 to +50 deg C.

## Study notes

- DURApulse GS4 series, G frame size, controller type listed as high-performance.
- Control modes: SVC or V/Hz; output type PWM; reverse capability built-in.
- Carrier frequency range 2-15 kHz; output frequency range 0.1-599 Hz.
- Current ratings: 352 A amperage rating, 370 A variable torque rating.
- Serial port: one RS-485 (RJ12) connection supporting Modbus RTU, Modbus ASCII and BACnet at up to 115.2k baud.
- I/O: 8 discrete inputs at 24 VDC (sinking/sourcing), 4 discrete outputs (relay/sinking/sourcing, 240 VAC and 48 VDC), 2 Form C (SPDT) relays.
- Analog I/O: 3 inputs (0-20 mA / 4-20 mA, +/-10 VDC, 11-bit) and 2 outputs (0-20 mA / 4-20 mA, 0-10 VDC, 10-bit).
- Load current 3 A/point for relays and 50 mA/point for discrete outputs; screw terminal connectors.
- Programming language: ladder logic (GSLOGIC drive PLC software, GSOFT2 configuration software).
- Optional EtherNet/IP and Modbus TCP communication cards are available; an EDS file and Rockwell AOI are provided.
- Enclosure is open frame with IP00 and IP20 ratings; no integrated EMI filter; not internally bypassed.
- Shipping weight 377 lb (about 171 kg); country of origin Taiwan.

## Sources

1. [DURApulse AC High-performance Drive: 460 VAC, 250hp with 3-phase input, (VFD) (PN# GS4-4250) | AutomationDirect](https://www.automationdirect.com/adc/shopping/catalog/drives_-a-_soft_starters/ac_variable_frequency_drives_(vfd)/high-performance_vfds/gs4-4250) (accessed 2026-10-26)
2. [GS4 4250 cutsheet](https://cdn.automationdirect.com/static/specs/cutsheet/GS4-4250_cutsheet.pdf) (accessed 2026-10-26)

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