Yokogawa AFS20D-H4221 Duplexed Field Control Unit

Company Information
E-mail		[email protected]
Mobile		+8613666033393
Whatsapp		+8613666033393
WeChat		13666033393
Add		Room 1004, No. 62 Xiangxiu Li, Siming District, Xiamen City, Fujian Province, China

Product Introduction

The Yokogawa AFS20D-H4221 Duplexed Field Control Unit is a high-performance, redundant control module designed for mission-critical industrial automation applications. The duplexed architecture ensures continuous operation even in the event of a component failure, providing high availability and reliability for process control and safety systems. The unit is engineered to integrate seamlessly with Yokogawa’s CENTUM VP and FAST/TOOLS platforms, supporting both distributed control system (DCS) and safety instrumented system (SIS) environments.

The AFS20D-H4221 is optimized for complex industrial processes such as oil and gas refining, petrochemical production, power generation, and chemical manufacturing. Its robust design withstands harsh environmental conditions, while its modular structure allows scalable deployment and simplified maintenance. With advanced diagnostics, real-time processing, and flexible I/O configuration, the unit delivers precise control, enhanced safety, and operational efficiency.

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Technical Specifications

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Applications

The AFS20D-H4221 Duplexed Field Control Unit is suitable for high-reliability applications, including:

• Critical process monitoring and control in petrochemical and chemical plants

• Automation of power generation systems, including turbines, boilers, and auxiliary equipment

• Oil and gas production and refining operations requiring high availability

• Safety-instrumented systems (SIS) in hazardous environments

• Remote control and monitoring in water treatment and utilities

• Redundant control for critical manufacturing processes

The duplex architecture ensures that process control is maintained without interruption, even if one unit fails, providing reliability essential for safety-critical operations.

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Advantages

The AFS20D-H4221 provides several operational advantages:

1. High Availability: Duplexed design ensures continuous operation even during hardware failures.

2. Flexible I/O Support: Handles extensive analog and digital inputs/outputs across two units.

3. Seamless Integration: Fully compatible with CENTUM VP and FAST/TOOLS systems for easy deployment.

4. Robust Safety Compliance: Certified for SIL 2 and ATEX Zone 2 for safety-critical operations.

5. Real-Time Processing: Efficient handling of multiple data channels ensures minimal latency.

6. Compact Duplex Design: Combined footprint reduces panel space while maintaining redundancy.

7. Advanced Diagnostics: Enables remote monitoring and predictive maintenance.

8. Scalability: Modular design allows easy expansion for complex industrial applications.

9. Redundant Communication: Ensures uninterrupted data transfer in critical processes.

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FAQ

1. What communication protocols does the AFS20D-H4221 support?
   It supports redundant Ethernet, PROFIBUS, and FOUNDATION Fieldbus for integration with industrial control systems.

2. Can it process analog and digital signals simultaneously in both units?
   Yes, each unit handles analog and digital I/O independently, providing full duplex operation.

3. What is the maximum number of I/O channels supported in duplex mode?
   The duplex unit supports 32 analog inputs, 16 analog outputs, 32 digital inputs, and 32 digital outputs.

4. How is the duplexed unit powered, and what is its typical power consumption?
   It operates on 24 V DC and consumes approximately 35 W under typical operating conditions.

5. Is the unit suitable for hazardous areas?
   Yes, the AFS20D-H4221 is ATEX Zone 2 certified and meets SIL 2 standards for safety applications.

6. What is the operating temperature range of the duplexed unit?
   The unit operates from -10 °C to 55 °C and can be stored between -20 °C and 70 °C.

7. How is the duplexed unit mounted?
   It supports DIN rail and panel mounting, with a combined modular footprint.

8. Can it be integrated with Yokogawa CENTUM VP or FAST/TOOLS systems?
   Yes, the unit is fully compatible with these platforms, ensuring seamless integration.

9. Does the duplexed system support remote diagnostics?
   Yes, remote monitoring and diagnostic functions enable predictive maintenance and troubleshooting.

10. What types of field devices can it control?
    It can control a wide range of field devices including transmitters, actuators, valves, and other industrial equipment using analog or digital signals.

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FAQ

1. What communication protocols does the AFS20D-H4221 support?
   It supports redundant Ethernet, PROFIBUS, and FOUNDATION Fieldbus for integration with industrial control systems.

2. Can it process analog and digital signals simultaneously in both units?
   Yes, each unit handles analog and digital I/O independently, providing full duplex operation.

3. What is the maximum number of I/O channels supported in duplex mode?
   The duplex unit supports 32 analog inputs, 16 analog outputs, 32 digital inputs, and 32 digital outputs.

4. How is the duplexed unit powered, and what is its typical power consumption?
   It operates on 24 V DC and consumes approximately 35 W under typical operating conditions.

5. Is the unit suitable for hazardous areas?
   Yes, the AFS20D-H4221 is ATEX Zone 2 certified and meets SIL 2 standards for safety applications.

6. What is the operating temperature range of the duplexed unit?
   The unit operates from -10 °C to 55 °C and can be stored between -20 °C and 70 °C.

7. How is the duplexed unit mounted?
   It supports DIN rail and panel mounting, with a combined modular footprint.

8. Can it be integrated with Yokogawa CENTUM VP or FAST/TOOLS systems?
   Yes, the unit is fully compatible with these platforms, ensuring seamless integration.

9. Does the duplexed system support remote diagnostics?
   Yes, remote monitoring and diagnostic functions enable predictive maintenance and troubleshooting.

10. What types of field devices can it control?
    It can control a wide range of field devices including transmitters, actuators, valves, and other industrial equipment using analog or digital signals.

Related Models (Same Series or Compatible)

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Popular Models (Same Brand)

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