Exploring Carlo Gavazzi Dupline Fieldbus Gateways – SD2DUG24, GRPG-I, G38910020230, G38910050230, GS38910125230, and GS33910060800
In the world of industrial automation and smart building control, Carlo Gavazzi has become synonymous with innovation, reliability, and versatility.
Among its wide portfolio of industrial communication products, the Dupline® Fieldbus Gateway series stands out for its ability to connect decentralized field devices, transmit real-time data, and enable efficient process control.
This article provides an in-depth overview of six key Dupline gateway models — SD2DUG24, GRPG-I, G38910020230, G38910050230, GS38910125230, and GS33910060800 — examining their features, parameters, and applications in modern automation systems.
1. Understanding the Carlo Gavazzi Dupline® Fieldbus Concept
The Dupline® fieldbus is Carlo Gavazzi’s proprietary communication system, designed to simplify field-level signal transmission across industrial environments.
Unlike traditional parallel wiring, Dupline uses two-wire bus technology to transmit digital and analog signals, reducing cabling complexity, installation costs, and downtime.
Key Advantages of Dupline® Fieldbus
- Two-wire simplicity – power and data over the same line
- Long communication distances (up to 10 km)
- High noise immunity for harsh environments
- Flexible topology (loop, star, or mixed)
- Integration with PLC, DCS, and SCADA systems
Gateways such as SD2DUG24, GRPG-I, and others serve as the interface between Dupline networks and higher-level control systems (Modbus, Profibus, Ethernet/IP, etc.), ensuring seamless communication across all automation layers.
2. The Role of Dupline Gateways in Industrial Communication
A Dupline gateway converts and manages signals between Dupline field devices (sensors, switches, I/O modules) and main controllers (PLC, SCADA, BMS).
It enables system integrators to link remote field modules with centralized intelligence while maintaining reliability and modularity.
Core Functions Include:
- Address decoding and signal mapping
- Communication protocol translation
- Power and synchronization for Dupline channels
- Diagnostic monitoring and system configuration
3. Carlo Gavazzi SD2DUG24 – The Universal Dupline Gateway
The SD2DUG24 is the most recognized model in the Dupline® gateway family. It acts as a universal bridge between Dupline and Modbus networks, supporting both RS485 and Modbus/TCP communication.
Key Features of SD2DUG24
- Two-way communication between Dupline and Modbus
- Built-in web server for configuration and diagnostics
- 128 digital or analog I/O channels
- LED indicators for bus status monitoring
- DIN-rail mounting, compact design
- Power supply: 24 VDC
Applications
- Building automation (lighting, HVAC, and access control)
- Process control and industrial monitoring
- Water and wastewater management systems
- Energy optimization in manufacturing plants
With its flexible architecture and open communication, SD2DUG24 ensures interoperability between legacy Dupline modules and modern PLC/SCADA platforms.
4. GRPG-I – Gateway for Reliable Process Integration
The Carlo Gavazzi GRPG-I gateway focuses on process automation and industrial field communication. It acts as a robust protocol converter, supporting Dupline to Profibus DP integration.
Technical Highlights
- Dupline ↔ Profibus DP interface
- Transparent data exchange between field and control levels
- Built-in diagnostic LEDs and fault monitoring
- 24 VDC power input
- Compact, modular housing for panel installation
Industrial Benefits
- Ideal for complex distributed control environments
- Reduces wiring and commissioning time
- Provides reliable communication in EMI-heavy conditions
The GRPG-I is especially valuable for large manufacturing plants where Profibus remains the backbone communication protocol, bridging traditional automation with next-generation control systems.
5. G38910020230 and G38910050230 – Modular Dupline Gateways for System Expansion
The G38910020230 and G38910050230 gateways are part of Carlo Gavazzi’s new generation of Dupline® communication interfaces, designed for enhanced flexibility and scalability.
Model Comparison
| Model | Description | Dupline Channels | Interface Type |
|---|---|---|---|
| G38910020230 | Standard Dupline gateway for DCS/PLC integration | 128 | RS485 Modbus RTU |
| G38910050230 | Extended version with additional diagnostic functions | 256 | Modbus/TCP Ethernet |
Key Functionalities
- Automatic device addressing
- Galvanic isolation for data integrity
- System self-diagnostics and error logging
- Multi-master communication support
Both models enable engineers to connect multiple field devices into one cohesive system, supporting large-scale industrial networks with robust signal reliability.
6. GS38910125230 – Gateway for Smart Buildings and Industrial Energy Management
The GS38910125230 Dupline Gateway represents a step forward in integrating smart energy systems with industrial fieldbus networks.
It enables real-time data acquisition, energy monitoring, and load optimization by linking Dupline sensors and power meters to supervisory systems.
Features and Benefits
- Ethernet and Modbus communication support
- Real-time monitoring of up to 512 points
- Configurable web interface for visualization
- Compatible with Carlo Gavazzi energy meters
- Ideal for BMS and EMS (Building & Energy Management Systems)
Application Examples
- Lighting and HVAC control
- Energy efficiency monitoring in factories
- Remote data collection and trend analysis
By bridging energy measurement modules and field automation systems, the GS38910125230 promotes smart and sustainable operation across industrial and commercial sectors.
7. GS33910060800 – Compact Gateway for Distributed I/O Networks
The GS33910060800 gateway is tailored for distributed control applications where compact design and low power consumption are critical.
Key Parameters
- Communication: Dupline ↔ Modbus RTU
- 64–128 configurable channels
- Power supply: 24 VDC
- Fast response time for real-time control
- Compatible with Carlo Gavazzi Dupline input/output modules
Typical Use Cases
- Local machine control
- Remote monitoring panels
- Decentralized process stations
- Integration of existing Dupline devices with new PLC systems
The GS33910060800 combines efficiency with simplicity, making it an excellent choice for OEMs and system integrators seeking compact and reliable fieldbus interfaces.
8. Comparison of Carlo Gavazzi Dupline Gateways
| Model | Interface | Supported Protocols | Application Focus |
|---|---|---|---|
| SD2DUG24 | RS485 / Modbus TCP | Dupline ↔ Modbus | Universal industrial gateway |
| GRPG-I | Profibus DP | Dupline ↔ Profibus | Process control |
| G38910020230 | RS485 | Dupline ↔ Modbus RTU | Standard integration |
| G38910050230 | Ethernet | Dupline ↔ Modbus TCP | Advanced diagnostics |
| GS38910125230 | Ethernet / Modbus | Dupline ↔ Energy & Building Control | Energy management |
| GS33910060800 | RS485 | Dupline ↔ Modbus | Compact distributed control |
This variety enables system designers to select the ideal Dupline gateway based on communication needs, protocol type, and installation environment.
9. Integration and Configuration Flexibility
Carlo Gavazzi provides configuration tools such as the Dupline Configurator software, allowing users to:
- Assign device addresses automatically
- Map input/output points efficiently
- Monitor communication status
- Update firmware and diagnostics remotely
These tools simplify commissioning, reduce engineering time, and minimize maintenance downtime — especially when integrating Dupline with Modbus, Profibus, or Ethernet-based PLCs.
10. Future of Dupline Communication and Industrial Connectivity
As Industry 4.0 continues to evolve, interoperability and real-time data accessibility are becoming essential.
The Dupline gateway series — including SD2DUG24, GRPG-I, G38910020230, G38910050230, GS38910125230, and GS33910060800 — plays a central role in bridging traditional field devices with IoT-ready automation platforms.
With their open communication protocols, cloud integration capabilities, and energy efficiency, these gateways support the transition toward smart factories, digital twins, and predictive maintenance ecosystems.
11. Conclusion
The Carlo Gavazzi Dupline Fieldbus Gateway lineup demonstrates the brand’s commitment to flexible, scalable, and future-proof automation solutions.
From the universal SD2DUG24 to the intelligent GS38910125230, each model offers specialized advantages for industrial, commercial, and energy applications.
Whether you are designing a new automation network or upgrading an existing control infrastructure, choosing the right Dupline gateway ensures:
- Seamless communication
- Reduced wiring complexity
- Enhanced data transparency
- Long-term system reliability
Carlo Gavazzi’s fieldbus solutions continue to empower industries worldwide with robust performance, smart integration, and sustainable connectivity.
