Yokogawa EB401-10

Technical Specifications

• Communication speed: 10 Mbps
• Maximum transmission distance: 185 meters per segment
• Supported segments: Up to 4 ER bus segments
• Connector type: BNC coaxial connector
• Current consumption: 0.7 A
• Weight: 0.3 kg
• Operating temperature: -20°C to +70°C
• Isolation voltage: 2 kV AC between system and field side
• Compatible mounting units: ANB10S, ANB10D ESB Bus Node Unit, AFF50 Advanced Fieldbus Foundation unit

Functional Features

• Supports simultaneous transmission of analog and digital data over the ER bus
• Built-in signal amplification and regeneration to maintain signal integrity over long distances
• Self-diagnostic function for detecting communication faults and segment abnormalities
• Hot-swap capability for module replacement without system shutdown
• Compatible with HART-enabled field instruments when running firmware version 2 or later
• Compact form factor for high-density rack installation

Application Scenarios

• Large-scale process control systems in petrochemical and chemical industries
• Power plant DCS systems with distributed field instrument layouts
• Pharmaceutical manufacturing process control
• Pulp and paper production line automation
• Water and wastewater treatment control systems

Working Principle

The module acts as a master node on the ER bus. It converts control commands and data from the upper-level DCS system into ER bus protocol signals, and distributes them to connected field instruments and I/O modules across multiple bus segments. It also collects process data and diagnostic information from field devices, converts the signals into system-compatible format, and transmits them back to the central control system. It manages bus communication timing and error correction to ensure reliable data exchange.

Installation Requirements

• Install in designated slots of ANB10S, ANB10D or AFF50 units
• Ensure proper alignment of backplane connectors before inserting the module
• Use certified BNC coaxial cables for ER bus connections
• Terminate the end of each ER bus segment with a matching terminator
• Secure the module with the fixing screw after insertion
• Maintain ambient temperature and humidity within rated operating ranges

Usage Notes

• Do not connect or disconnect bus cables while the system is powered on
• Ensure bus cable impedance matches the module specification to avoid signal reflection
• Regularly check BNC connector tightness to prevent communication interruption
• Firmware updates must be performed following official Yokogawa procedures
• Do not exceed the maximum number of devices per bus segment
• Keep the module surface clean and free of conductive dust