Yokogawa AFS30D Duplexed Field Control Unit

The Yokogawa AFS30D Duplexed Field Control Unit (FCU) is a powerful and resilient control processor used in Yokogawa’s CENTUM VP Distributed Control System (DCS). Built with full redundancy—including CPU, power supply, and communication interfaces—the AFS30D ensures high system availability, fault tolerance, and uninterrupted operations in mission-critical industrial applications.

This model represents an enhanced version of the earlier AFS20D, offering greater I/O capacity, improved processing performance, and tighter integration with modern field communication protocols like Vnet/IP, FOUNDATION Fieldbus, and HART. Designed for harsh environments and 24/7 process control, the AFS30D is particularly suited for oil and gas plants, chemical processing, power generation, and large-scale utility infrastructures where operational downtime is not an option.

Product Specifications

Product Applications

The AFS30D is engineered for environments requiring maximum reliability, precision, and uninterrupted control. Its advanced duplexed architecture and compatibility with safety systems make it ideal for the following industries:

• Oil & Gas Refineries

  Real-time monitoring and control of compressors, ESD systems, and pipeline operations.

• Chemical and Petrochemical Plants

  Management of reaction vessels, distillation units, interlocks, and emergency stops.

• Power Generation (Thermal, Hydro, Nuclear)

  Turbine control, generator synchronization, boiler management, and substation monitoring.

• Water & Wastewater Facilities

  Supervises chemical dosing, pump sequencing, valve control, and remote telemetry.

• Pharmaceuticals

  Manages batch processes, cleanroom HVAC systems, and GMP-compliant control logic.

• Steel & Cement Manufacturing

  Controls heavy-duty processes like furnace operations, material handling, and conveyor systems.

Product Advantages

• Complete Redundancy

  The AFS30D is built for uninterrupted service. Dual CPUs, power units, and communication interfaces automatically take over during failure events.

• Enhanced Performance

  Faster processors and more memory enable it to handle complex process logic and high-speed communication.

• Modular and Scalable

  Works with a wide range of I/O modules for expansion and custom configurations.

• Advanced Diagnostics

  Self-diagnostic routines and real-time error reporting minimize troubleshooting time and prevent unplanned downtime.

• Secure and Compliant

  Built-in security features meet global industry standards (e.g., ATEX, SIL3, FM).

• Reliable Communication

  Vnet/IP and FIO ensure consistent, high-speed control network communication across plant systems.

• Long Service Life

  Industrial-grade components and Yokogawa’s proven design philosophy ensure decades of performance.

Frequently Asked Questions (FAQ)

1. What makes the AFS30D different from the AFS20D?

   The AFS30D offers more processing power, higher I/O capacity, and expanded protocol support while maintaining full redundancy.

2. Can I use the AFS30D with ProSafe-RS for SIS?

   Yes, it integrates seamlessly with Yokogawa’s safety system to support SIL2/SIL3 applications.

3. Does the AFS30D support FOUNDATION Fieldbus?

   Yes, it is compatible with FOUNDATION Fieldbus and other field protocols like HART and Modbus.

4. What is the typical use of Vnet/IP in this unit?

   Vnet/IP provides high-speed, secure communication between the control unit and other system components.

5. Is hot-swapping supported for power modules or I/O modules?

   Yes, redundant components can be serviced while the system remains online.

6. What happens if one CPU fails?

   The second CPU takes over instantly without interrupting system operations.

7. Can the AFS30D be used in hazardous locations?

   Yes, it is ATEX- and FM-certified for use in explosive or flammable environments.

8. Does it support remote diagnostics and engineering?

   Yes, it can be accessed via engineering workstations for configuration and diagnostics remotely.

9. How does it integrate into a distributed control system?

   It serves as a field control node within the larger CENTUM VP DCS framework, communicating with I/O, HIS, and ENG stations.

10. What kind of power supplies are used in AFS30D?

    It supports redundant 24 V DC power modules with automatic switching and monitoring.