Yokogawa ANB11D-225/BU2B Optical Repeater Dual-Redundant ESB Bus Node Unit

Hardware Specifications

Yokogawa ESB Communication and Process Signal Interface

The ANB11D-225/BU2B manages communication between field I/O modules and the FCU through a dual-redundant ESB bus architecture. Moreover, the integrated optical repeater function extends ESB communication capability while maintaining the connection path between distributed I/O nodes and the control unit.

The unit also supplies power to installed I/O modules and supports analog I/O and contact I/O signal exchange through the ESB network. Therefore, the node configuration provides a physical interface point for distributed CENTUM VP I/O architectures.

For Yokogawa process control applications, the hardware supports DCS signal transmission characteristics including isolated field signal handling, 4-20 mA process loop interfaces, and distributed I/O connectivity through CENTUM VP network structures. The module design maintains channel communication separation to reduce interference during field signal acquisition and transmission.

Frequently Asked Questions

Q: Which module connects the ANB11D-225/BU2B to the FCU?
A: The ANB11D-225/BU2B connects to the FCU through an ESB Bus Couple Module EC401 or EC402 installed in the FCU slots.

Q: Can the ANB11D-225/BU2B operate with a single ESB bus connection?
A: Yes. For a single configuration, EC401 or EC402 is installed in slot 7 while slot 8 remains empty.

Q: What power supply versions are available for this node unit?
A: The unit supports 100-120 VAC, 220-240 VAC, and 24 VDC power supply configurations according to the selected suffix specification.

Field Installation Guidelines

Install the ANB11D-225/BU2B in a compatible 19-inch rack using the specified mounting hardware. Ensure that the rack installation provides sufficient mechanical support and maintains correct insulation accessory placement.

Connect the ESB Bus Couple Module according to the required redundant or single configuration. Additionally, verify that ESB communication cables maintain proper routing separation from high-voltage power wiring to reduce electrical interference.

For field wiring, confirm that power supply terminals match the selected voltage specification before energizing the unit. Maintain appropriate grounding and shield termination practices for ESB communication and field signal cables according to Yokogawa installation requirements.