Yokogawa AFV10D-S41211 Duplexed Field Control Unit

Overview

The AFV10D‑S41211 is a high-reliability communication module designed for duplexed Field Control Units (FCUs) in Yokogawa CENTUM VP and ProSafe‑RS systems. Operating in redundant pairs, these modules deliver fault-tolerant, real-time network communication, ensuring continuous control even if one path fails. The module acts as the primary interface between FCUs and the Vnet/IP network, supporting deterministic, low-latency communication for safety and process control applications.

Key Applications

• Redundant FCU network communication

• FCU-to-HIS/ENG and inter-FCU communication

• Integration with remote I/O nodes and safety controllers

• High-availability industrial process control

Technical Specifications

General Information

• Model: AFV10D‑S41211

• Module Type: Vnet/IP Communication Interface

• System Compatibility: CENTUM VP, ProSafe‑RS

• Function: Duplexed FCU network interface

Network & Communication Features

• Network Protocol: Yokogawa Vnet/IP deterministic Ethernet

• Communication Mode: Real-time, low-latency, fault-tolerant

• Redundancy: Supports automatic switchover in duplexed operation

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

• Functional Roles: FCU-to-FCU, FCU-to-HIS/ENG, remote I/O communication

• Diagnostics: Network health monitoring, self-diagnostics, error reporting

Performance Characteristics

• Latency: Deterministic, suitable for real-time control

• Throughput: High-speed, capable of large DCS/SIS data transfer

• Redundancy Behavior: Seamless switchover without interrupting control execution

Electrical & Hardware Details

• Power Supply: Derived from FCU backplane

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

• Reliability: Designed for continuous, mission-critical operation in duplexed FCUs

Mechanical & Environmental

• Form Factor: Hot-swappable plug-in module

• Cooling: Passive convection

• Construction: Industrial-grade PCB with protective coating

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

• Relative Humidity: 5–95% RH, non-condensing

• Vibration: Suitable for control cabinet installation

• EMC: Industrial-grade immunity to electrical noise

FAQ & Comparative Notes

Q: Can AFV10D‑S41211 be used in a single FCU system?
A: While technically possible, the module is optimized for duplexed FCU configurations to leverage redundancy and automatic switchover.

Q: How does it compare to AFV10D‑S41210?
A: The S41211 variant adds enhanced diagnostics and improved network throughput suitable for large-scale redundant networks.