Product Description

The ANR10D-420 is a high-reliability Node Interface Unit (NIU) developed by Yokogawa Electric Corporation for the CENTUM VP Distributed Control System.

Serving as a communication bridge between Field Control Units (FCUs) and remote I/O modules, the ANR10D-420 operates over a dual-redundant ER Bus (Extended Remote Bus) architecture. With support for redundant power supplies and communication paths, it ensures continuous transmission of analog and digital field signals—even in the event of a single component failure. Its 19-inch rack-mountable design enables high-density I/O deployment in control rooms and marshaling cabinets.

Detailed Technical Specifications

System Integration & Communication

• Connects to FCUs via ER Bus Interface Master Module (e.g., EB401)

• Supports up to 14 remote nodes per FCU (depending on database license such as /NDEL option)

• Typical data refresh cycle: < 1 second for standard variables

• Designed for scalable architectures across large industrial facilities

• Enables distributed control topology while maintaining high-speed, deterministic communication

Industrial Application Scenarios

• Large-scale oil refineries and petrochemical plants

• Power generation facilities

• Chemical processing sites

• Remote I/O expansion for distributed plant layouts

• High-availability systems requiring redundant communication paths

Technical FAQs

What modules fit into the ANR10D-420?
The chassis supports Yokogawa FIO modules, including:

• AAI Series (Analog I/O modules)

• ADV Series (Digital I/O modules)

• Specialized communication modules

Can this unit be used in hazardous areas?
The “-0” suffix indicates a basic version without explosion protection. For hazardous environments, versions with Type n or FM Non-Incendive certifications should be selected.

Is it hot-swappable?
Yes. I/O modules installed within the ANR10D-420 can generally be replaced while the system remains powered and operational, provided the configuration supports hot-swapping.