AAI835-S00 Yokogawa

AAI835-S00 Yokogawa central processing unit

Product  Description：

Yokogawa Central Processing Units (CPUs), most notably those within the CENTUM Distributed Control System (DCS) and FA-M3 range-free controllers, represent the pinnacle of computational reliability for continuous process automation. These units are engineered to execute complex regulatory control, batch processing, and safety-instrumented functions in environments where system downtime is entirely unacceptable. By employing advanced dual-redundant architectures, Yokogawa CPUs ensure that production lines remain active and safe under all operating conditions.

Product Parameters

The technical foundation of a Yokogawa CPU emphasizes high availability, rapid processing, and massive data handling capabilities:

• Processor Architecture: High-performance, proprietary or industrial-grade microprocessors optimized for real-time control loop execution.

• Control Loop Capacity: Capable of managing from dozens to thousands of control loops simultaneously, depending on the specific model generation.

• Basic Instruction Execution Speed: Processes standard logic instructions within several nanoseconds, enabling rapid response to field changes.

• Memory Capacity: Equipped with high-integrity ECC (Error-Correcting Code) memory, featuring ample capacity for user control logic, recipe data, and diagnostic logs.

• Redundancy Switchover Time: Features seamless, bumpless transfer to a backup CPU in less than several milliseconds during a hardware fault.

• Communication Bus Interfacing: Direct integration with Yokogawa's proprietary Vnet/IP high-speed control network for deterministic data transfer.

Product Advantages

Yokogawa CPUs are recognized globally for their exceptional stability and long-term operational lifecycle:

• Seven-Nines Availability: Designed for extreme reliability, achieving up to 99.99999 percent availability through hardware redundancy and rigorous quality testing.

• Bumpless Redundancy: If the active CPU encounters a fault, the standby unit takes over instantly without disrupting the control output signals or losing data.

• Long Product Lifecycle: Yokogawa provides unprecedented backward compatibility, allowing older control algorithms to run on newer generation CPU hardware.

• Online Maintenance: System updates, program changes, and even hardware replacements can be executed while the CPU is actively running the plant, ensuring zero lost production time.

• Advanced Self-Diagnostics: Continuous internal monitoring detects memory corruption, processing errors, and temperature anomalies before they cause an operational failure.

Product Applications

These central processing units are deployed in large-scale, critical process industries around the world:

• Oil and Gas Refineries: Controlling distillation columns, catalytic crackers, and blending operations where precision and safety are paramount.

• Petrochemical Plants: Managing high-pressure, exothermic chemical reactions that require millisecond-level interlocking and cooling control.

• Power Generation Stations: Regulating boiler systems, turbine operations, and emission controls in thermal and nuclear power facilities.

• LNG Supply Chains: Governing the cryogenic cooling, storage, and regasification processes across liquefied natural gas transport networks.

• Pharmaceutical Manufacturing: Executing strict batch processing recipes that comply with international regulatory standards for data integrity.

Important Precautions

To preserve the extreme reliability of Yokogawa CPUs, engineers must adhere to strict installation and operational protocols:

• Enclosure Environmental Control: The CPU must be installed in a clean, temperature-controlled environment free of corrosive gases like hydrogen sulfide. Airborne contaminants can degrade the fine circuitry over time.

• Proper Grounding Architecture: Implement a dedicated, low-resistance instrument ground separate from the plant's structural or power ground to prevent electrical noise from causing logic glitches.

• Backup Battery Management: For modules utilizing volatile memory elements, monitor the status of the internal backup battery and replace it while the system is powered up to prevent losing parameters.

• Network Isolation: Protect the Vnet/IP control network from the general plant IT network using secure firewalls. Do not plug unauthorized communication devices directly into the CPU rack.

• Firmware Synchronization: When operating a redundant pair, ensure that both the active and standby units run the exact same firmware version to prevent communication and synchronization mismarks.

The structure and details of the product：

Our services：

Shipping Port:  China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

Warranty: one year

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Our main products include DCS control system spare parts, PLC system spare parts, and robot system spare parts. Our advantageous brands include Allen Bradley, Bently Nevada, ABB, HIMA, Reliance, Bender, National Instruments, Emerson Ovation, Honeywell, Siemens, Allen Bradley, ICS Triplex, FOXBORO, Schneider, GE Fanuc, Motorola, HIMA, Prosoft, and other imported industrial components. Our main products serve a wide range of electronic, metallurgical, chemical, and power plants Industries such as steel mills, rubber, cement, machinery and equipment, and construction.