Yokogawa ANB10D-421 Node Interface Unit

Overview

The Yokogawa ANB10D‑421 is a high-performance Node Interface Unit (NIU) engineered for CENTUM VP and CENTUM CS3000 distributed control systems. It acts as the central communication bridge between remote I/O modules—including analog, digital, and specialty modules—and the Field Control Unit (FCU), while seamlessly integrating with Vnet or Vnet/IP networks. Designed for industrial-grade reliability, this module supports distributed I/O configurations to simplify wiring, enhance scalability, and maintain deterministic control performance.

Technical Specifications

General

• Model: ANB10D‑421

• Type: Node Interface Unit (NIU)

• Function: Central communication and synchronization interface for remote I/O racks

• Compatible Systems: CENTUM VP, CENTUM CS3000, Remote I/O node units

Communication

• Network: Vnet / Vnet/IP (system-dependent)

• Role: Real-time data exchange, I/O scanning, module addressing, and synchronization

• Topologies Supported: Star, Ring, Dual-redundant networks

• Redundancy: Supports redundant NIU configurations

• Diagnostics: Node health monitoring, communication status reporting, error detection and isolation

Performance

• Data Throughput: High-speed suitable for large I/O configurations

• Latency: Deterministic timing for real-time process control

• Functions: Polls I/O modules, detects module presence, synchronizes with FCU scan cycles

• Reliability: Designed for continuous 24/7 operation

Electrical & Hardware

• Power Supply: Drawn from remote I/O backplane

• Isolation: Network-to-system isolation with high noise immunity

• Supported Modules: Analog I/O, Digital I/O, and specialty modules depending on node configuration

Mechanical & Environmental

• Form Factor: Plug-in module for Yokogawa remote I/O base

• Cooling: Passive convection

• Construction: Industrial-grade PCB with protective coating

• Installation: Hot-swappable in redundant setups

• Operating Temperature: 0 °C to +50 °C

• Humidity: 5–95% RH, non-condensing

• EMC & Vibration: High immunity to industrial electrical noise, suitable for cabinet or control-room mounting

Applications

Ideal for distributed control system architectures in chemical, power, and manufacturing plants, enabling reliable remote I/O communication and scalable system expansion.

FAQ

Q: Can the ANB10D‑421 work in redundant network configurations?
A: Yes, it supports dual-redundant NIU setups and ring/star topologies for high availability.

Q: Which I/O modules are compatible?
A: Analog input/output, digital input/output, and specialty modules compatible with CENTUM VP or CS3000 remote I/O racks.

Q: Is hot-swapping supported?
A: Yes, modules can be replaced in redundant systems without shutting down operations.