The Yokogawa AFS40S and AFS40D Field Control Units (FCUs) are critical components in the Yokogawa CENTUM CS 3000 Production Control System. These units handle real-time control functions, providing the intelligence behind the Field Control Station (FCS). The AFS40S is designed for standard applications, while the AFS40D features a duplex configuration for enhanced reliability and fault tolerance.

Technical Specifications

• Processor:
  • Type: VR5432
  • Speed: 133 MHz
• Main Memory:
  • Capacity: 16 Mbyte
• I/O Modules:
  • Types Supported: Analog and digital signal I/O modules
  • Functionality: Interfaces with various field devices for data acquisition and control
• Communication:
  • Network: V-net token-bus or Ethernet
  • Connectivity: Links to other FCS units and Human Interface Stations (HIS)
• Control Functions:
  • Algorithms: Real-time control and process management
  • Features: Implements advanced control strategies for optimal performance
• Redundancy:
  • AFS40D: Duplexed configuration for fault tolerance and continuous operation
• Operating Conditions:
  • Temperature: Typically -20°C to +60°C
  • Power Supply: 24 VDC
• Applications:
  • Industries: Oil & gas, petrochemical, chemical, power generation, automotive, semiconductor, food and beverage