Yokogawa ANB11D-215/BU2A Optical Repeater Dual-Redundant ESB Bus Node Unit

Hardware Specifications

Process Control Signal Interface and Isolation Features

The ANB11D-215/BU2A operates as an ESB bus node interface between field I/O modules and Yokogawa FCU hardware. Moreover, the optical repeater function extends ESB bus communication through optical transmission paths while maintaining dual-redundant communication architecture.

The unit supports process control I/O integration where analog signals and contact signals transfer between field devices and the control system. In addition, Yokogawa DCS architectures commonly apply channel-to-channel isolation methods to separate field signal paths and reduce electrical interference during operation.

The ESB bus node design allows connection through EC401 or EC402 ESB Bus Couple Modules installed in the FCU. Therefore, the configuration depends on the required redundant or single ESB communication structure.

Frequently Asked Questions

Q: Which FCU modules are required to connect the ANB11D-215/BU2A to an ESB bus network?
A: The unit requires EC401 or EC402 ESB Bus Couple Modules installed in the FCU. Dual configuration requires installation in slot 7 and slot 8, while single configuration uses slot 7 only.

Q: What power supply options are available for the ANB11D-215/BU2A?
A: The unit supports 100 – 120 VAC, 220 – 240 VAC, and 24 VDC power supply configurations according to the selected suffix code.

Q: Can the ANB11D-215/BU2A operate with optical ESB communication?
A: Yes. The unit integrates an optical repeater function for dual-redundant ESB bus communication between field I/O modules and FCU equipment.

Field Installation Guidelines

Install the ANB11D-215/BU2A in a compatible 19-inch rack system using the specified rack mounting hardware. Ensure the unit connects to the FCU through correctly installed EC401 or EC402 ESB Bus Couple Modules.

Maintain proper separation between power wiring and ESB communication cables to reduce electromagnetic interference. In addition, connect cable shields according to the system grounding design and verify that optical communication paths remain free from excessive bending or mechanical stress.

Before energizing the unit, confirm that the selected power supply voltage matches the configured suffix specification. Check rack fixation, module seating, and ESB bus connections during commissioning procedures.