Industrial communication networks can be classified into several categories based on various criteria such as the communication protocol used, network topology, application, and industry standards. Here are some common classifications:

1. Fieldbus Networks:

   • Fieldbus networks are used for communication between field devices such as sensors, actuators, and controllers in industrial automation systems.
   • Examples include PROFIBUS, DeviceNet, Modbus, Foundation Fieldbus, and CANopen.
   • Fieldbus networks typically use a master-slave architecture or a peer-to-peer communication model.

2. Ethernet-based Networks:

   • Ethernet-based networks utilize standard Ethernet protocols for communication in industrial environments.
   • These networks offer higher bandwidth and flexibility compared to traditional fieldbus networks.
   • Examples include EtherNet/IP, PROFINET, EtherCAT, and Modbus TCP/IP.
   • Ethernet-based networks can support various network topologies such as star, ring, and line configurations.

3. Wireless Networks:

   • Wireless networks eliminate the need for physical wiring and enable communication in areas where wired connections are impractical.
   • Examples include WirelessHART, ISA100 Wireless, and Wi-Fi-based industrial networks.
   • Wireless networks can provide flexibility, mobility, and scalability in industrial applications.

4. SCADA (Supervisory Control and Data Acquisition) Systems:

   • SCADA systems are used for monitoring and controlling industrial processes remotely.
   • They typically utilize communication protocols such as DNP3 (Distributed Network Protocol 3), Modbus, or OPC (OLE for Process Control).
   • SCADA systems often integrate with other industrial communication networks to gather data from sensors and devices.

5. Industrial Internet of Things (IIoT) Networks:

   • IIoT networks enable connectivity and data exchange between industrial devices, machines, and systems for data analysis and optimization.
   • IIoT networks can use various communication protocols such as MQTT (Message Queuing Telemetry Transport), CoAP (Constrained Application Protocol), and AMQP (Advanced Message Queuing Protocol).
   • These networks often leverage cloud computing and edge computing technologies for data processing and analytics.

6. Safety Networks:

   • Safety networks are dedicated to ensuring the safety of industrial processes and machinery.
   • Examples include PROFIsafe, SafetyBUS p, and AS-Interface Safety at Work (ASISafe).
   • Safety networks implement safety-related communication protocols and mechanisms to achieve functional safety requirements.

These classifications provide an overview of the diverse range of industrial communication networks used in various industrial sectors, each tailored to specific requirements such as reliability, speed, determinism, and safety.