Fieldbus gateways – find manufacturers and suppliers

Fieldbus gateways connect different industrial communication protocols, ensure data consistency between systems from different manufacturers and enable the smooth flow of information between machines, sensors, actuators, controllers and higher-level IT systems.

As a large number of heterogeneous fieldbus and industrial Ethernet networks are used in many systems, gateways provide a central interface to ensure compatibility and interoperability.

Below you will find the functionality and types of fieldbus gateways, their use and their advantages:

How fieldbus gateways work:

A fieldbus gateway serves as a translator between two or more communication systems.
It reads data from one network, processes it and sends it on in the format of another network.
This process can be both cyclical and event-based.

The core functions are:

1. Protocol conversion between different fieldbuses or Ethernet protocols.
2. Synchronization of data points.
3. Addressing and assignment of variables.
4. Prioritization of messages and real-time communication.
5. Buffering and filtering of data.
6. Diagnostics, status monitoring and error messages.

Modern gateways often work with integrated processor cores and real-time operating systems that guarantee low latency times and high transmission reliability.
They can work purely as translators or take on active logic functions, such as small automation tasks or data compression.

Types of fieldbus gateways:

Fieldbus gateways can be differentiated according to various criteria. The most important categories are:

1. Fieldbus-to-fieldbus gateways:
   These gateways connect classic fieldbuses with each other.
   Examples include connections between Profibus, CANopen, Modbus RTU or DeviceNet.
   They are often used in older systems where different systems need to be merged without having to replace the entire infrastructure.
2. Fieldbus-to-industrial Ethernet gateways:
   These gateways enable communication between traditional fieldbuses and modern Ethernet-based protocols such as Profinet, EtherCAT, Ethernet/IP or Modbus TCP.
   They play an important role in modernization projects and when setting up hybrid system structures.
3. Industrial Ethernet to Industrial Ethernet gateways:
   This is where different Ethernet protocols are linked together.
   These gateways enable the integration of high-performance systems and often support deterministic real-time requirements.
   They are characteristic of modern Industry 4.0 environments.
4. Protocol converters for special networks:
   Some gateways connect industrial networks with proprietary interfaces, such as serial protocols, wireless systems or IoT platforms.
   Examples include MQTT gateways or OP UA gateways.
5. Multifunctional or universal gateways:
   These devices can serve many different protocols simultaneously.
   They have a modular design and can be flexibly adapted using plug-in modules or software licenses.
   They are used in complex systems to bundle several communication layers centrally.

Use of fieldbus gateways:

Fieldbus gateways are used wherever heterogeneous communication systems have to work together. Typical areas of application are:

1. Integration of different automation systems:
In production plants, machines often communicate in different protocols.
Gateways enable comprehensive process control and data consolidation.

2. Modernization and retrofitting:
When switching from old fieldbuses to Industrial Ethernet networks, gateways enable a gradual migration without having to replace the entire infrastructure.

3. Connecting sensors and actuators with control or IT systems:
Here, gateways ensure that measured values, status data or control commands are transmitted correctly and in real time.

4. Industry 4.0 and IIoT:
Gateways often act as a link between production facilities and cloud-based analysis systems.
They support protocols such as MQTT, OPC UA or REST APIs.

5. Security and access control systems:
In some cases, gateways take on the function of a secure communication path by implementing filter functions or access restrictions.

Advantages of fieldbus gateways:

Fieldbus gateways offer a variety of benefits, both technical and economic:

• They enable communication between systems from different manufacturers and technologies. This makes it easier to expand or modernize complex systems.
• Instead of replacing complete machine control systems or network architectures, gateways can be used cost-effectively to connect incompatible systems.
• Gateways allow old fieldbus structures to be retained and new Ethernet or IoT systems to be integrated at the same time. This significantly extends the service life of existing systems.
• Many gateways support deterministic real-time communication, which is crucial for motion control systems, robotics or assembly lines.
• Thanks to diagnostic tools, logging functions and monitoring interfaces, gateways offer additional insights into the system status. This makes maintenance easier and increases operational reliability.
• In modular systems, gateways can be quickly retrofitted to integrate new machine sections or production lines.
• Gateways can monitor data streams, filter unwanted packets or use protocol limits as a safety barrier.

Fieldbus gateways are an indispensable element of modern automation architectures. They enable seamless communication between different sensor, control and IT systems and offer solutions for integration, modernization, IIoT connection and process optimization. With their diverse types, high flexibility and distinctive diagnostic and safety functions, they make a decisive contribution to the efficiency, transparency and future viability of industrial systems.

Here you will find an overview of the most important points to consider when purchasing fieldbus gateways:

The purchase of fieldbus gateways requires careful analysis, as wrong decisions can lead to communication problems, production downtimes or increased maintenance costs. Professional purchasing therefore goes far beyond price alone: it must take into account technical requirements, compatibility, security, service options and long-term availability to ensure reliable and efficient operation.

• The first step is to precisely define the technical requirements:
• Which fieldbus or Ethernet protocols must be supported?
• What data volumes and transmission rates are required?
• Do real-time or deterministic communication requirements need to be met?
• Should additional functions such as data buffering, filtering, logging or small automation tasks be integrated?
• Only a precise specification of these parameters enables the selection of a suitable gateway that reliably fulfills the requirements.
• Gateways differ greatly in their range of functions:
• Fieldbus-to-fieldbus gateways for older networks.
• Fieldbus-to-Industrial-Ethernet gateways for modernization and integration
• Industrial Ethernet to Industrial Ethernet gateways for complex network architectures
• Multifunctional or universal gateways with modular expandability
• Purchasing should clarify with the engineers which design is optimal for the existing and planned infrastructure. Wrong decisions can lead to subsequent retrofitting costs or integration problems.
• Fieldbus gateways must translate device communication correctly. This is important:
• Support of all relevant protocol variants and versions.
• Correct addressing and data assignment.
• Synchronization of cycle times and trigger events.
• Incomplete compatibility can lead to incorrect data, failures or even system downtimes.
• Purchasing should give preference to manufacturers who can demonstrate extensive compatibility lists and reference projects.
• In modern automation processes, deterministic communication is crucial, for example in motion control systems or synchronized manufacturing processes. The gateway must be able to
• Maintain short latencies.
• Precisely reproduce cycle times.
• Avoid data loss or delays.
• Purchasing should look for devices with real-time or prioritization functions that meet the process requirements.
• Modern gateways offer integrated diagnostic tools, monitoring and alarm functions.
• A professional purchase will ensure that these features are available and easily accessible to minimize downtime.
• Gateways often handle the connection between different networks and can act as a security barrier.
• The purchasing department must check whether the devices meet the security requirements of the respective industry.
• Configuration and commissioning should be as simple as possible. This is crucial:
• Intuitive software interfaces.
• Automation support via scripts or templates.
• Integration into existing SCADA, PLC or MES systems.
• Remote maintenance and update capability.
• A user-friendly gateway saves training costs and reduces errors during commissioning.
• Gateways often operate continuously in harsh industrial environments.
• Reliability is crucial to avoid downtime and production losses.
• Delivery times, support and long-term availability are particularly important for projects with a long service life or planned system expansions.
• A favorable purchase price alone does not guarantee an economical solution. Purchasing should consider the life cycle and total costs.

Professional purchasing of fieldbus gateways requires careful coordination between technology, production, IT and quality assurance. Reliable, efficient and future-proof communication solutions in industrial systems can only be ensured by taking a holistic view of the criteria listed. Professionally selected fieldbus gateways make a decisive contribution to process stability, data quality and overall operational reliability and avoid costly retrofits or downtime.

Fieldbus gateways can be purchased from various suppliers. You will find comprehensive information on manufacturers and suppliers of Fieldbus gateways around the world on Exportpages.