# AutomationDirect GS33-4100

Hardware · `GS33-4100` · verification: source checked

The GS33-4100 is an enclosed DURApulse GS30 series AC variable frequency drive rated for 100 hp on a 460 VAC three-phase input. It controls three-phase induction and permanent magnet AC motors using SVC, V/Hz, FOC, encoder or torque control modes, with an RS-485 port running Modbus RTU or Modbus ASCII slave protocols plus a USB B port. It mounts on a panel or wall, uses spring clamp terminals, and accepts optional communication, encoder and I/O modules.

## Specification

| Property | Value |
|---|---|
| Category | vfd |
| Weight | 47.17 kg |
| Supply voltage | 460 VAC |
| Rated power | 74.57 kW |
| Frame size | I |
| Output type | PWM output |
| IP rating | IP20 |
| Operating temp min | -20 °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.
- External dynamic braking unit required.
- User-supplied external fuse required.
- Enclosure IP20; operating temperature range -20 to +50 deg C.
- UL Listed File # E198015; CE declaration and RoHS status stated as yes.

## Study notes

- Series GS30, controller type high-performance; frame size I.
- Control modes: SVC, V/Hz, FOC, encoder or torque.
- Amperage rating 150 A; variable torque amperage rating 180 A.
- Carrier frequency range 2-15 kHz; output frequency range 0.1-599 Hz.
- Discrete I/O: 7 sinking/sourcing inputs at 24 VDC, 3 relay/sinking/sourcing outputs rated 240 VAC and 30 VDC, one Form C (SPDT) relay; load current 3 A/point relay, 50 mA/point discrete.
- Analog I/O: 2 current/voltage inputs, 12-bit resolution, 0-20 mA and 4-20 mA or +/-10 VDC; 1 current/voltage output, 10-bit resolution, 0-20 mA and 4-20 mA or 0-10 VDC.
- Communications: (1) RS-485 (RJ45) and (1) USB B; port speed up to 115.2k baud.
- Input signal options: 4-20 mA, voltage, potentiometer or pulse train input.
- Programming language ladder (embedded PLC software GSLOGIC and GSOFT2 configuration software are listed).
- Integrated EMI filter: no. Internally bypassed: no. Reverse capability: built-in.
- No CSA file number stated; UL Recognized and UL Hazardous file numbers stated as none.
- Shipping weight 104 lb; country of origin India.

## Sources

1. [DURApulse AC High-performance Drive: 460 VAC, 100hp with 3-phase input, (VFD) (PN# GS33-4100) | AutomationDirect](https://www.automationdirect.com/adc/shopping/catalog/drives_-a-_soft_starters/ac_variable_frequency_drives_(vfd)/high-performance_vfds/gs33-4100) (accessed 2026-10-26)
2. [GS33 4100 cutsheet](https://cdn.automationdirect.com/static/specs/cutsheet/GS33-4100_cutsheet.pdf) (accessed 2026-10-26)

---

Source page: https://machineschema.com/hardware/automationdirect-gs33-4100  
JSON: https://machineschema.com/hardware/automationdirect-gs33-4100.json  
License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Cite Machine Schema and the original sources.