Flexible Data Communication in Industrial Systems with Fieldbus I/O Modules

28 July 2025 Knowledge Base

In modern industrial automation systems (IIoT, Industry 4.0), efficient sensor data acquisition and actuator control are critical. Fieldbus I/O modules are indispensable components for this task. They act as "translators" and "hubs," connecting diverse analog and digital signals to Fieldbus systems and industrial network protocols. This enables centralized management of distributed devices, significantly simplifying installation and diagnostics while enhancing system reliability. Let's explore key protocols and solutions from ICP DAS, available on our website.

EtherCAT

EtherCAT (Ethernet for Control Automation Technology) is one of the fastest industrial protocols, operating over Ethernet. It provides deterministic data transmission with minimal latency, making it ideal for real-time control, robotics, and high-speed machinery.

  • ICP DAS - ECAT-2610 : 16-channel analog input module (0~20 mA, 0~5 V, ±10 V), 16-bit resolution, galvanic isolation.
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  • ICP DAS - ECAT-2611: 8-channel analog output module (0~20 mA, 0~5 V, 0~10 V), 16-bit resolution, overload protection.
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Applications: Motion control, synchronized high-frequency data acquisition, complex conveyor systems.

EtherNet/IP

EtherNet/IP (EtherNet Industrial Protocol) is an open standard using Ethernet and the CIP (Common Industrial Protocol) for real-time data and configuration. Widely adopted, especially in North America.

Applications: Integration with Allen-Bradley PLCs, SCADA systems, production line control, data collection.

BACnet

BACnet (Building Automation and Control Networks) is a specialized protocol for BMS/BAS, HVAC, lighting, and security systems. Ensures interoperability between equipment from different manufacturers.

Applications: HVAC, smart buildings, energy monitoring.

PROFINET

PROFINET – an open industrial Ethernet standard by PI – delivers real-time transmission (RT, IRT) and IT integration. Dominant in European industry.

Applications: Production automation, Siemens PLC integration, process control.

CANopen

CANopen – based on CAN – is known for reliability, flexibility, and low cost. Popular in transport, medical, and specialized automation.

Applications: Mobile machinery, medical equipment, machine tools, access control.

DeviceNet

DeviceNet is a fieldbus-level protocol (based on CAN) for connecting sensors, actuators, and simple I/O devices. Known for simplicity.

Applications: Pushbuttons, sensors, indicators, drives – especially with Allen-Bradley PLCs.

PROFIBUS

PROFIBUS DP – a long-established and widely used protocol – provides high-speed communication between PLCs and remote I/O modules.

Applications: Legacy PROFIBUS upgrades, distributed I/O, process automation.


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