The Yokogawa CP345 is a high-performance processor module designed for the CENTUM CS 3000 and CENTUM VP Distributed Control Systems (DCS). As a Style S1 module, it represents a refined hardware revision engineered for high-speed control logic execution and stable system communication. This processor board serves as the “brain” of the Field Control Station (FCS), managing real-time data processing, I/O scanning, and complex regulatory control functions essential for continuous industrial processes.

 

Product Specifications

• Model Number: CP345
• Style: S1
• Product Type: Processor Board Module
• System Compatibility: CENTUM CS 3000 / CENTUM VP
• Processor Architecture: High-speed 32-bit RISC Processor
• Memory: High-capacity ECC RAM and Non-volatile Flash Memory
• Communication Interface: Vnet/IP or VL net compatible

Dimensions and Physical Attributes

• Height: 13.0 cm
• Width: 4.2 cm
• Depth: 25.5 cm
• Weight: 0.75 kg
• Country of Origin: Japan

 

Application Fields

The CP345 Style S1 is primarily utilized in large-scale process industries that require 24/7 operational continuity. It is widely deployed in oil and gas refineries, chemical processing plants, pharmaceutical manufacturing, and iron and steel mills. Its high reliability and support for redundant configurations make it ideal for critical control loops where system failure could lead to significant production loss or safety hazards.

 

Product Usage Instructions

When installing the Yokogawa CP345, ensure the Field Control Unit (FCU) power is cycled according to the Yokogawa safety manual or performed in a redundant “Hot-Swap” environment if the system supports it. The module must be inserted into the designated processor slot of the FCU backplane. Ensure the locking levers are fully engaged to guarantee proper contact with the bus. Configuration and firmware synchronization are typically handled via the System View engineering software. Always use an antistatic wrist strap during handling to protect the sensitive CMOS components.

 

Frequently Asked Questions Q&A

Q: Can a Style S1 module be used alongside an older style board in a redundant setup? A: It is highly recommended to use identical style codes (e.g., two S1 modules) in a redundant pair to ensure perfectly synchronized timing and diagnostic behavior.

Q: What does the “HR” status LED indicate on the front panel? A: The “HR” (Health/Run) LED indicates the operational status; a solid green light typically means the processor is functioning correctly and executing control logic.

Q: Does the CP345 support Vnet/IP? A: Yes, the CP345 is designed to communicate over Yokogawa’s proprietary high-speed control network, providing seamless data integration across the entire plant.

 

Related Product News

Yokogawa has continued to support the longevity of the CP345 series through the “Centum VP Lifecycle Agreement,” which allows plants to maintain their existing S1 modules while gradually migrating to newer controller generations. Recent industry reports highlight the CP345’s exceptional Mean Time Between Failures (MTBF), reinforcing its reputation as a workhorse in the DCS market. As digital transformation takes hold, Yokogawa is providing bridge solutions that allow these processor boards to securely export data to advanced analytics platforms without compromising the integrity of the control layer.

 

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