Product Description

The ANB11D-215/BU2B is a high-availability interface unit engineered for the Yokogawa CENTUM VP distributed control system. It integrates an optical repeater, enabling ESB bus communication to be extended up to 5 km via fiber optic cabling. This allows reliable data exchange between the Field Control Unit (FCU) and remote I/O modules across large-scale industrial sites.

To ensure maximum uptime, the ANB11D-215/BU2B features a dual-redundant power supply architecture, preventing a single power module failure from interrupting I/O operation or optical communication.

The unit is equipped with the BU2B connector assembly, which includes an integrated ESB bus terminator, making it ideal for end-of-line optical node applications. Its rugged design supports standard 19-inch rack mounting, providing a stable and scalable backbone for complex automation systems.

Technical Specifications

Application Context

The ANB11D-215/BU2B is widely used in large, geographically dispersed industrial facilities such as:

• Refineries

• Offshore platforms

• Water treatment plants

Its integrated optical repeater provides strong EMI immunity and enables long-distance communication, allowing remote instrument clusters to connect seamlessly with centralized control systems without signal degradation.

FAQ

What is the function of the BU2B connector in this unit?
The BU2B connector serves as 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 110 V AC power?
No, the “-2” suffix indicates a 220–240 V AC power configuration. For 100–120 V AC environments, a different model suffix (typically “-1”) must be selected to ensure proper power compatibility.