The Schneider Electric HMIG3U is a Harmony GTU series Premium Box unit, designed as a high-performance industrial HMI controller (box module) used together with GTU display panels to build flexible and scalable human-machine interface systems.
Unlike traditional all-in-one HMIs, the HMIG3U separates the computing core from the display, enabling engineers to design modular architectures for complex automation, multi-station control, and IIoT-ready industrial systems. It is widely used in manufacturing plants, process control environments, OEM machinery, packaging systems, and energy management applications where system flexibility and long-term upgradeability are important.
This model belongs to Schneider Electric’s premium GTU architecture, supporting multi-protocol communication and robust industrial integration.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | HMIG3U |
| Series | Harmony GTU |
| Product Type | HMI Box / Controller Unit |
| Display | External GTU display required |
| Rated Supply Voltage | 12–24 V DC |
| Processor | RISC CPU (industrial controller architecture) |
| Memory | 256 MB RAM |
| Storage | 1 GB internal SD card |
| Backup Memory | 512 KB NVRAM |
| Communication Ports | Dual Ethernet RJ45 |
| Serial Interfaces | RS-232 / RS-422 / RS-485 |
| USB Ports | USB 2.0 (Type-A x2, Mini-B x1) |
| Supported Protocols | Modbus, Modbus TCP/IP, Uni-Telway |
| Expansion | Fieldbus card support |
| Operating System | Harmony runtime environment |
| Cooling Method | Natural convection |
Mechanical Dimensions & Weight
| Item | Specification |
|---|---|
| Width | 188 mm |
| Height | 131 mm |
| Depth | 45 mm |
| Weight | Approx. 0.9 kg |
The compact form factor allows installation inside control cabinets or machine panels, making it suitable for distributed control architectures.
Recommended Related Models
- Schneider HMIG2U – Standard GTU box unit
- Schneider HMIG5U – High-performance GTU controller
- Schneider HMIG5U2 – Advanced modular controller
- Schneider GTU display modules (various sizes)
- Schneider Modicon M241 PLC
- Schneider Modicon M251 PLC
Popular Schneider Electric HMI Platforms
- Harmony GTU Modular HMI Series
- Easy Harmony ET6 Series
- Easy Harmony ET5 Series
- Magelis HMI Systems
- Modicon Integrated Automation Solutions
