Product Description

The SB401-10 is a specialized Bus Interface Module designed for Yokogawa Electric Corporation’s FIO (Field network I/O) system. It serves as the primary communication bridge between a Field Control Unit (FCU) and an ESB (Extended Serial Backplane) Bus Node Unit, enabling remote I/O modules to integrate seamlessly with CENTUM VP or CS 3000 DCS architectures.

The -10 suffix denotes a specific hardware revision optimized for signal integrity and compatibility with the standard 36-pin ESB bus connector. The module ensures high-speed, deterministic data transfer, maintaining the real-time performance required for critical process control loops.

Technical Specifications

Application and Installation

The SB401-10 is installed in the FCU or Node Unit to act as the master interface for the ESB bus, linking the central processor to remote I/O modules in distributed node units. A typical setup uses YCB301 cabling to connect to SB401 modules in remote cabinets, enabling flexible I/O placement without compromising the unified control environment.

Professional FAQ

Does the SB401-10 support redundancy?
Yes. Two SB401-10 modules can be installed in a redundant configuration. If the primary module or cable fails, the system automatically switches to the secondary module, maintaining uninterrupted communication.

What is the difference between SB401 and ANB10?
The SB401-10 is the interface module, whereas the ANB10 is the Node Unit chassis. The SB401 module is required to link the chassis to the control system.

Can the SB401-10 be used for ER Bus communication?
No. The SB401-10 is strictly for ESB Bus short-distance cabinet linking. ER Bus communication requires EB401 or other ER-specific modules.