YOKOGAWA DUAL LAYER ST5A AS S9221AQ-0 S9771AJ-0 PLC MODULE CARD BOARD

Description:

The Yokogawa ST5*A PLC Module Card AS-S9221AQ-0 / S9771AJ-0 is used in distributed control systems for control processing and signal interface within PLC/DCS architectures. Commonly installed in Yokogawa control racks and industrial automation cabinets for system operation and signal handling. Maintenance teams and system integrators use this part for replacing legacy control boards, repairing PLC systems, or maintaining reliable processing and communication in process control systems.

Applications:

The Yokogawa ST5*A module is commonly used in industrial automation environments where control logic and signal interfacing are required within PLC or DCS systems. It is frequently applied in oil & gas, chemical plants, and manufacturing systems to manage process control operations and interface with I/O modules. Control boards like this serve as internal processing or interface layers within legacy Yokogawa systems, ensuring coordinated operation of plant equipment.

Technical Specifications:

• Manufacturer: Yokogawa
• Model / Part Number: ST5*A / AS-S9221AQ-0 / S9771AJ-0
• Product Type: PLC Module Card / Control Board
• Function: Control processing and internal signal interface within PLC/DCS systems
• System Compatibility: Yokogawa PLC and CENTUM DCS systems
• Construction: Dual-layer PCB (control board architecture)
• Installation: Rack-mounted card within control cabinets
• Role: Supports system control, signal routing, and internal communication
• Application: Industrial process control and automation systems
• Form Factor: Plug-in module card
• Status: Legacy / surplus industrial module

Common Replacements:

• Yokogawa EA9A Interface Card
• Yokogawa EA1A Signal Interface Module
• Yokogawa AIP413 Control Module