ANB10D-427/CU2N YOKOGAWA ESB Bus Node Unit

The Yokogawa ANB10D‑427/CU2N is part of the ANB10D family of ESB Bus Node Units, a series of dual‑redundant ESB (Enhanced System Bus) node units used in

Yokogawa distributed control systems (DCS) such as CENTUM VP/CS 3000 to interface field I/O modules with a Field Control Unit (FCU). These node

units serve as the local interface point for signals and power between field‑level devices and the core control logic, ensuring reliable,

real‑time communication over an industrial safety bus architecture.

Frequently Asked Questions

Q1. What is the ANB10D‑427/CU2N Node Unit used for?
A: It is an ESB Bus Node Unit used to connect field I/O signals (analog/digital) and modules to a Field Control Unit (FCU) via the Enhanced System

Bus (ESB) within Yokogawa distributed control systems. The unit also supplies power to the connected I/O modules.

Q2. What does “dual‑redundant” mean in this context?
A: Dual‑redundant refers to redundant power supplies and communication links, so if one path fails, the system continues

operating using the secondary path — increasing reliability in industrial automation and safety‑critical applications.

Q3. What does the /CU2N suffix indicate?
A: The /CU2N option means the node unit includes Connector Units for ESB Bus

(typically two), providing hardware interfaces that allow reliable, redundant

connections to the ESB network.

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