CP345 | Yokogawa Processor Board S9781DE-02

The Yokogawa CP345 (specifically the S9781DE-02 revision) is a fundamental processor board module for Centum CS 3000 and Centum VP Distributed Control Systems (DCS). It serves as the high-speed computational engine for Field Control Stations, managing real-time process data, complex control algorithms, and seamless communication across the industrial network.

YOKOGAWA NFBU200-S05 S1 BASE MODULE

Product Specifications

  • Model Number: CP345 (S9781DE-02)

  • Product Type: Processor Board Module

  • Processor: 32-bit High-performance RISC

  • Memory: ECC-protected RAM with long-term battery backup

  • Interface: VL Net / Vnet/IP compatible

  • Configuration: Supports Single or Dual-Redundant setups

  • Dimensions: 130 mm x 45 mm x 250 mm

  • Weight: 0.88 kg

  • Country of Origin: Japan

Application Fields

The CP345 S9781DE-02 is utilized in heavy-duty industrial sectors including:

  • Energy Sector: Monitoring and controlling thermal and nuclear power plant stability.

  • Oil & Gas: Managing offshore drilling platforms and complex refinery logic.

  • Chemical Production: Precision control of high-risk chemical reactions and storage.

  • Manufacturing: Orchestrating large-scale factory automation and assembly lines.

Product Usage Instructions

  • Installation: Align the module with the processor slot in the FCS unit and push until the ejector handles lock. Always check for bent pins before insertion.

  • Powering: The module draws power from the rack backplane. Ensure the power supply modules are active and the voltage is stable before initializing.

  • Redundancy Setup: If using two CP345 boards, ensure they have identical firmware versions to allow for automatic data synchronization and “bumpless” switchover.

  • Maintenance: Replace the memory backup battery according to the scheduled maintenance cycle (usually every 3–5 years) to prevent loss of control parameters during outages.

Frequently Asked Questions (Q&A)

Q: What is the primary function of the S9781DE-02? A: It acts as the central processing unit for the DCS, executing the control logic and managing I/O communication for the entire station.

Q: Can I replace an older CP345 with the S9781DE-02 version? A: Yes, as long as your system software and backplane are compatible with the CP345 series specifications.

Q: What do the LEDs on the front panel indicate? A: The ‘RUN’ LED (Green) indicates normal processing, ‘STBY’ (Green) shows the module is ready in a redundant pair, and ‘FLT’ (Red) signals a hardware or logic fault.

Q: Does this module require special cooling? A: It is designed for natural convection cooling within a standard Yokogawa cabinet, provided the ambient temperature remains within the specified industrial range.

Similar Model Recommendations

  • Yokogawa CP333D: Dual-redundant CPU module for standard control nodes.

  • Yokogawa CP461: Modern Vnet/IP processor for high-speed Centum VP stations.

  • Yokogawa CP451-10: High-efficiency processor board with expanded memory.

  • Yokogawa AIP827: Interface module used for Vnet/IP communication links.

  • Yokogawa CP471: Safety-certified processor board for SIS (Safety Instrumented Systems).

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