Yokogawa ANB11D-215/BU2B ESB Bus Node Units

Suffix Breakdown & Model Matrix

Hardware Specifications

Yokogawa DCS Signal Interface and Isolation Features

The ANB11D-215/BU2B uses an optical ESB bus architecture to transfer field I/O data between remote node assemblies and Field Control Units. Moreover, the optical transmission path reduces electrical noise influence during long-distance communication. The unit supports Yokogawa FIO modules and provides the physical infrastructure for analog and contact signal acquisition.

In addition, Yokogawa DCS I/O architectures commonly support process instrumentation interfaces such as 4-20 mA HART loop communication, FOUNDATION Fieldbus, and Profibus PA connectivity through compatible I/O modules. The ANB11D node structure maintains channel separation and supports signal integrity requirements for distributed process control installations.

The dual-redundant power configuration allows the node unit to continue operation when one power supply module becomes unavailable. Therefore, the system maintains ESB bus communication continuity through redundant power paths.

Frequently Asked Questions

Q: Does the ANB11D-215/BU2B support optical ESB bus communication?
A: Yes. The unit provides an optical repeater function for dual-redundant ESB bus communication and supports transmission distances up to 5 km when configured with compatible optical modules.

Q: What power configuration does the ANB11D-215/BU2B use?
A: The unit uses a dual-redundant power supply configuration with 100 – 120 V AC input power.

Q: Does the /BU2B option include ESB bus termination?
A: Yes. The /BU2B option specifies a connector unit with an integrated ESB bus terminator.

Field Installation Guidelines

Install the ANB11D-215/BU2B in a compatible Yokogawa rack system and secure the assembly using the specified mechanical mounting points. Ensure that optical fiber connections follow the required bend radius and routing limitations to prevent transmission loss.

Connect AC power wiring according to the dual-redundant power supply arrangement and verify protective grounding before energizing the unit. Furthermore, separate optical communication cables from high-voltage power cables to reduce electromagnetic interference.

Confirm that installed FIO modules, ESB bus connectors, and terminator configurations match the approved system design. Perform communication checks after installation to verify correct node recognition and bus operation within the CENTUM VP system.