The Yokogawa AFV30D-S41201 Duplexed Field Control Unit (FCU) is a highly reliable and fault-tolerant controller used within the Yokogawa CENTUM VP distributed control system (DCS). Designed for critical process industries such as petrochemicals, power generation, oil & gas, and pharmaceuticals, the AFV30D-S41201 provides duplex (redundant) architecture that ensures continuous operation even under hardware failure conditions.

This model integrates high-speed processing, deterministic communication, and redundancy management. It is widely used in mission-critical control loops, advanced process control, and large-scale plant automation. The FCU also offers hot-swap capabilities for key modules, minimizing downtime during maintenance.

Product Specifications

Product Applications

The Yokogawa AFV30D-S41201 is designed for demanding industrial environments where high availability and fault tolerance are critical. Its applications include:

• Petrochemical and Refining: Control of complex distillation, cracking, and catalytic processes.

• Power Generation: Turbine, boiler, and balance-of-plant automation in thermal and nuclear facilities.

• Oil & Gas: Supervisory control for offshore platforms, LNG plants, and pipeline management.

• Pharmaceuticals: Precision control of batch processes with strict quality compliance.

• Water & Wastewater: Monitoring and control of large-scale water treatment and distribution systems.

• Steel & Cement: Continuous process control for high-temperature industrial operations.

Product Advantages

• High Reliability: Duplexed architecture ensures uninterrupted control even during component failures.

• Scalability: Supports large I/O capacity for small to large-scale plant operations.

• Deterministic Communication: Real-time data exchange with high-speed Vnet/IP backbone.

• Seamless Redundancy Switching: Automatic failover without process interruption.

• Long-Term Stability: Proven reliability in harsh industrial environments.

• Flexible Integration: Compatibility with legacy Yokogawa systems and third-party protocols.

• Hot-Swappable Modules: Maintenance without shutting down the system.

• Security-Enhanced: Built-in cyber protection features to safeguard industrial networks.

FAQ

1. What is the typical control cycle time of the AFV30D-S41201?

   The control cycle is typically 50 ms, ensuring rapid process response.

2. How does the system respond if the primary CPU fails?

   The duplexed architecture automatically switches to the backup CPU with no interruption to operations.

3. Does the unit support integration with FOUNDATION Fieldbus and HART devices?

   Yes, it fully supports FOUNDATION Fieldbus, HART, and other industrial protocols.

4. Is it possible to make configuration changes while the unit is running?

   Yes, online modifications can be applied without stopping the control process.

5. What redundancy options exist for the power supply?

   The unit supports dual 24 V DC redundant power supply inputs for uninterrupted operation.

6. Is the AFV30D-S41201 compatible with earlier CENTUM CS 3000 systems?

   Yes, it offers backward compatibility, ensuring smooth migration from legacy Yokogawa platforms.

7. How is communication reliability ensured in the network?

   The Vnet/IP backbone uses redundant paths to prevent data loss and single-point failures.

8. Are the modules hot-swappable during system operation?

   Yes, critical modules can be replaced online without shutting down the process.

9. What is the maximum number of I/O points supported?

   The unit supports up to 1,000 I/O points, with further expansion possible through additional units.

10. What cybersecurity features are integrated in the system?

    It includes access control, encrypted communication, and audit trail functionality for enhanced security.