Yokogawa ANB11D-225/BU2B CENTUM VP Node Unit for Dual-Redundant ESB Bus

Product Overview

The Yokogawa ANB11D-225/BU2B functions as a high-reliability node unit designed for the CENTUM VP integrated production control system. This unit facilitates seamless communication between the Human Interface Station (HIS) and Field Control Stations (FCS) via a dual-redundant ESB bus. By integrating an optical repeater, it extends signal transmission distances up to 5 km, ensuring robust data integrity across large-scale industrial facilities. We supply this unit as 100% brand new and original factory-sealed equipment.

Part Number Breakdown

The model code ANB11D-225/BU2B follows Yokogawa's modular engineering logic:

Technical Specifications

This node unit optimizes fieldbus communication through the following parameters:

• Manufacturer: Yokogawa

• Power Requirements: 220 V to 240 V AC (Single-phase)

• Redundancy: Supports full dual-redundancy for power and communication

• Transmission Medium: Optical fiber cable for long-distance stability

• Maximum Distance: 5 km between nodes

• Component Type: Includes BU2B Connector Unit with built-in terminator

• Shipping Weight: 12 kg (includes protective industrial packaging)

• Condition: Brand New, Factory Original

Engineering Advantages

• Long-Distance Signal Integrity: The integrated optical repeater eliminates electromagnetic interference (EMI) issues common in copper wiring. It allows engineers to bridge vast distances (up to 5 km) without signal degradation or the need for intermediate boosters.

• Zero-Downtime Power Architecture: The dual-redundant power supply modules prevent system shutdowns. If one power source fails, the secondary module instantly takes the load, maintaining continuous operation of critical industrial processes.

• Simplified Termination: The BU2B connector unit includes a pre-integrated terminator. This design simplifies the physical layer setup, reduces the risk of reflection errors on the ESB bus, and accelerates the commissioning phase during site installation.

• Hardened Industrial Durability: Yokogawa builds the ANB11D to withstand the thermal and electrical stresses of control room environments, ensuring a mean time between failures (MTBF) that meets rigorous B2B industrial standards.

FAQs

• Is this unit compatible with existing CENTUM VP systems?

  Yes, the ANB11D-225/BU2B integrates directly with CENTUM VP R5.01 and higher. It supports standard ESB bus protocols used in Yokogawa’s distributed control system (DCS) architecture.

• Does the unit require a separate terminator for the ESB bus?

  No. This specific configuration includes the /BU2B suffix, which means the connector unit already contains the necessary terminator. You do not need to purchase or install an external termination resistor.

• How should I handle the optical ports during installation?

  Always keep the dust caps on the optical connectors until the moment of fiber connection. Even microscopic dust particles can impede the 5 km signal strength. Ensure your fiber optic cables match the multi-mode or single-mode specifications defined in the Yokogawa hardware manual.