Product Description
The AFS20D-H4221/3-NDF4/3-NDR4 is a high-availability Duplexed Field Control Unit (FCU) designed for the Yokogawa CENTUM VP distributed control system. It functions as the primary processing node responsible for executing real-time control logic, data acquisition, and plant-wide automation tasks.
This FCU features a dual-processor redundant architecture that ensures continuous operation even if one processor encounters a hardware fault. With automatic failover capability, the system maintains uninterrupted process control, making it suitable for mission-critical industrial applications.
Designed for cabinet or rack installation, the AFS20D-H4221/3-NDF4/3-NDR4 delivers the processing power and high-speed V net / IP communication required for large-scale distributed automation systems. The unit includes an integrated power supply and cooling system, ensuring stable performance and long-term operational reliability in demanding industrial environments.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model Number | AFS20D-H4221/3-NDF4/3-NDR4 |
| Unit Type | Duplexed Field Control Unit (FCU) |
| System Platform | Yokogawa CENTUM VP |
| Processor Architecture | Dual-redundant processors with automatic failover |
| Communication Interface | V net / IP redundant communication bus |
| Power Input | 220–240 V AC (standard configuration) |
| Mounting Type | 19-inch rack mount or cabinet integrated |
| Redundancy Scheme | 1-out-of-2 (1oo2) duplexed processor configuration |
| Functional Safety | Designed for SIL-rated reliability environments |
| Cooling System | Integrated fan module with operational status monitoring |
| Diagnostics | Real-time hardware self-diagnostics and alarm reporting |
Industrial Applications
The AFS20D-H4221/3-NDF4/3-NDR4 FCU serves as the central control engine within plant-wide automation systems. It is commonly deployed in environments where system downtime can result in major operational, financial, or safety impacts.
The unit can manage thousands of I/O points, executing advanced control strategies such as PID loop control, sequential logic, and interlocking protection functions. Typical installation locations include central control rooms, automation cabinets, or satellite control racks.
Industries that frequently deploy this FCU include:
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Petrochemical refineries
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Offshore oil and gas platforms
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Power generation plants
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Large-scale chemical processing facilities
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Heavy manufacturing operations
In these environments, the FCU coordinates communication across V net/IP nodes, ensuring synchronized control across distributed subsystems and field devices.
FAQ
Q: What is the benefit of the duplexed configuration in the AFS20D-H4221/3-NDF4/3-NDR4?
A: The duplexed design uses two processors operating in parallel. If the primary processor fails, the standby processor automatically takes control without interrupting the running process, ensuring bumpless transfer and continuous operation.
Q: Can this unit be integrated into a V net/IP network?
A: Yes. The AFS20D-H4221/3-NDF4/3-NDR4 fully supports Yokogawa V net/IP communication, allowing seamless integration with other controllers, network I/O nodes, and supervisory systems within the CENTUM VP architecture.
| Quick Quotes | Receive price & availability FAST from our dedicated customer service team. |
|---|---|
| Delivery | Expedited, Freight, And International Shipping Available. |
| Condition | 100% New with Original Package |
| Payment | We accept American Express, Discover, MasterCard, PayPal, and Visa. Our site is secured by RapidSSL. |
| Shipping Port | ShangHai, Xiamen |
| Warranty | 12 Months |
| Q: Is Our Pricing Competitive? |
| A: Yes, we collaborate with over 50 countries worldwide. As a top supplier in China, we offer significant discounts based on market trends. |
| Q: What Is the Warranty Period? |
| A: All our new and original products come with a standard one-year warranty. |
| Q: What Payment Methods Do We Accept? |
| A: We require 100% T/T (Telegraphic Transfer) payment before shipping. For items with a lead time, a 30% deposit is needed upfront, and the remaining 70% is due before shipping. If you have a representative in China, you can arrange an RMB transfer through them. |
| Q: What Shipping Methods Do We Use? |
| A: We primarily use FedEx, DHL, UPS, and BRE for shipping. If you have an account with any of these carriers, you can handle shipping directly. We also offer free shipping to China-based freight forwarders. |
| Q: What Is Our Delivery Time? |
| A: Delivery usually takes 1-3 days after receiving the initial payment. For items with a lead time, shipping will occur according to the specified schedule. |
| Q: How Do We Package the Goods? |
| A: We ensure safe packaging with multiple layers of protection. Products are first placed in their original boxes and sealed with labels. A layer of bubble wrap is then added for collision protection during transit. Finally, the items are packed securely in durable boxes. |
| Q: How Can Customers Contact Us and Request a Quote? |
| A: You can reach out to us via email, WhatsApp, WeChat, Skype, or your preferred communication platform. Contact us with your needs, and we'll provide a prompt, customized quote. |
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