Product Overview

The SSB401-11 is a high-performance optical communication interface used in the Yokogawa CENTUM VP Integrated Production Control System. It functions as an ESB bus optical repeater (master side), extending the ESB bus over fiber-optic media to enable long-distance connection of Field Control Units (FCUs).

By converting electrical ESB signals into optical signals, the module ensures high-speed, noise-immune data transmission over extended distances, making it ideal for distributed control architectures and electrically harsh industrial environments.

Technical Specifications

Implementation & Compatibility

• Installed in the ESB Bus Node Unit (ANB10) or Field Control Unit (FCU)

• Operates in conjunction with:

• SSB401-11 (Master Side)

• SSB411 (Slave Side)

• Enables reliable ESB bus extension between local and remote nodes, including installations across separate buildings or process areas

• Supports redundant configurations for high-availability systems

Application

• Distributed CENTUM VP control systems

• Remote FCU or I/O installations

• Long-distance ESB bus extension using fiber optics

• Environments with high EMI or grounding challenges

Common Technical Questions

What does the “-11” suffix indicate?
The -11 suffix identifies a specific hardware revision defined by Yokogawa, ensuring compatibility with CENTUM VP R5 and R6 systems.

Does the SSB401-11 support redundancy?
Yes. Two modules can be installed in paired slots to form a dual-redundant optical ESB bus link.

Is hot-swap supported?
Yes. In redundant configurations, the module supports hot-swapping, allowing maintenance without process interruption.