UT35A-002-11-00 Yokogawa

UT35A-002-11-00 Yokogawa central processing unit

Product  Description：

Yokogawa Central Processing Units (CPUs), particularly those integrated into the flagship CENTUM Distributed Control System (DCS) and the Stardom network-based control systems, act as the core computational engine for large-scale industrial process automation. These processors are engineered to execute highly complex control algorithms, manage extensive I/O data structures, and handle deterministic system communications simultaneously. They are built for continuous operation where system failure is not an option.

Product Parameters

The technical baseline of a Yokogawa CPU module centers on processing speed, high-fidelity synchronization, and data capacity:

• Core Processor Architecture: Equipped with high-performance, industrial-grade microprocessors optimized for floating-point calculations and rapid loop executions.

• Control Loop Capacity: Capable of running hundreds of complex PID control loops, sequence logic blocks, and advanced process control regulatory routines within a single station.

• Scan Time Performance: Supports selectable, ultra-fast control execution cycles, typically scaling from 10 milliseconds up to 1 second depending on process requirements.

• Memory Capacity: Features highly reliable Error-Correcting Code (ECC) main memory alongside non-volatile flash memory to protect data against power interruptions.

• Communication Bus Integration: Features direct, embedded interfaces to Yokogawa's dual-redundant Vnet/IP control network, delivering real-time deterministic communication at gigabit speeds.

• Environmental Resilience: Rated for harsh environments with specialized conformal coating options to resist chemical corrosion, dust, and operating temperatures from -20°C to 70°C.

Product Advantages

Yokogawa CPUs are recognized globally for their high availability and operational longevity:

• Pair-and-Spare Redundancy: Many Yokogawa CPU modules employ a unique "Pair-and-Spare" hardware architecture. Two microprocessors execute the same program in parallel on a single card, constantly comparing results; this is paired with a identical standby card for seamless, bump-free switchover if a hardware mismatch is detected.

• High Availability Online Maintenance: Control programs, functional blocks, and I/O parameters can be modified and downloaded online while the CPU is actively controlling the plant, completely eliminating the need for scheduled maintenance shutdowns.

• Native Cyber Resilience: Designed with integrated security controls at the hardware level, protecting the execution environment from unauthorized firmware modification or denial-of-service network attacks.

• Long Life Cycles and Migration Paths: Yokogawa prioritizes backward compatibility, allowing older control logic configurations to be migrated into modern CPU hardware with minimal re-engineering.

• Tight Advanced Control Integration: The processor natively handles multivariable control and specialized optimization algorithms alongside basic regulatory control without needing external computers.

Product Applications

These central processing units are deployed as the primary control core in major heavy industries:

• Oil and Gas Refining: Governing high-risk, continuous units like crude distillation columns, fluid catalytic crackers, and massive hydrotreating facilities.

• Petrochemical Production: Managing continuous feedstocks and precise exothermic chemical reactions in ethylene plants and polymer manufacturing facilities.

• Liquefied Natural Gas (LNG) Processing: Controlling the multi-stage cooling loops, fractionators, and high-pressure compressors involved in global LNG liquefaction and regasification.

• Thermal and Nuclear Power Generation: Managing boiler combustion, steam turbine coordination, and cooling water dynamics to ensure stable electricity grid delivery.

• Chemical and Pharmaceutical Batch Processing: Executing complex, highly regulated batch control recipes that demand strict compliance with international manufacturing tracking standards.

Important Precautions

To preserve the operational integrity and guarantee the safety of the CPU module, the following practices must be enforced:

• Redundancy Initialization Verification: When installing redundant CPU pairs, technicians must verify that the tracking link is fully synchronized before trusting the system to handle a manual or automatic failover.

• Strict Firmware Matching: In redundant setups, both the active and standby CPU cards must run the exact same firmware revision number; mismatched firmware can inhibit communication synchronization and disable safety switchovers.

• Anti-Static Protocol: The internal components of the CPU module are highly susceptible to electrostatic discharge. Always utilize a grounded wrist strap and static-dissipative mats when removing or handling the hardware during servicing.

• Battery and Memory Maintenance: Ensure the health of the internal memory backup batteries is regularly checked via the system diagnostics. A low-battery alarm must be addressed promptly to prevent parameter loss during an unexpected complete power cycle.

• Network Isolation Compliance: Never connect the dedicated Vnet/IP communication ports on the CPU directly to a standard commercial office network. Industrial data traffic must remain isolated through designated firewalls and security domains to prevent processor overloading.

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.