Product Description

The ANB11D-B15/BU2B is a high-availability expansion node designed for the Yokogawa CENTUM VP distributed control system (DCS). It integrates an optical repeater, enabling ESB bus communication to be extended up to 5 km via fiber optic cabling. This allows seamless connectivity between the Field Control Unit (FCU) and remote I/O modules across large industrial sites.

To ensure maximum system uptime, the unit features a dual-redundant power supply architecture. This design prevents interruptions in the event of a single power module failure, maintaining continuous operation of both I/O modules and optical communication links.

The unit is equipped with the BU2B connector assembly, which includes a built-in ESB bus terminator. This makes it suitable for end-of-line optical node applications, ensuring stable signal transmission and preventing data reflections.

With a rugged 19-inch rack-mount design, the ANB11D-B15/BU2B provides a reliable and scalable backbone for complex automation systems.

Technical Specifications

Application Context

The ANB11D-B15/BU2B is widely used in large, geographically distributed industrial environments such as:

• Refineries

• Offshore platforms

• Water treatment plants

Its integrated optical repeater enables long-distance, EMI-immune communication, making it ideal for connecting remote instrumentation with centralized control systems without signal degradation.

FAQ

What is the function of the BU2B connector in this unit?
The BU2B connector provides the ESB bus interface and includes a built-in terminator. This ensures proper signal termination at the end of a bus segment, preventing reflections and maintaining data integrity.

Can this unit be used with 220 V AC power?
No, the ANB11D-B15/BU2B (suffix -B1) is designed for 100–120 V AC input. For 220–240 V AC applications, a different model suffix (typically -2) must be selected to ensure compatibility.