New Original Yokogawa CP451-51 32-bit RISC Processor

Product Overview

The Yokogawa CP451-51 (CP451 51) functions as the high-integrity central processing unit for CENTUM VP Field Control Units, specifically the AFV300 and AFV400 series (also compatible with AFV10S/D). This 100% brand new, original module executes the core control logic, manages complex data acquisition, and coordinates multi-protocol communication for large-scale industrial plants. Engineered to replace the legacy CP451-11, the CP451-51 integrates a 32-bit RISC processor to handle continuous, sequential, and batch control tasks with high precision. Its specialized architecture supports dual-redundant "hot" standby modes, ensuring that critical process loops remain active even during hardware maintenance or unforeseen faults.

Part Number Breakdown

The CP451-51 utilizes specific suffix codes to define its environmental and safety rating:

Technical Specifications

The CP451-51 combines industrial-grade memory retention with high-speed computational power.

Engineering Advantages

The Yokogawa CP451-51 addresses the challenges of harsh industrial environments and mission-critical uptime:

• G3-Level Environmental Resilience: This module features an ISA Standard G3 compliant conformal coating. This protective layer prevents circuit board corrosion caused by sulfur dioxide, chlorine, or high humidity, making it the ideal choice for petrochemical refineries and wastewater treatment plants.

• Zero-Interruption Failover: When paired in a duplexed configuration, two CP451-51 modules synchronize their internal data registers in real-time. If the primary CPU fails, the secondary module assumes control within milliseconds, preventing process "bumps" and ensuring continuous safety.

• Multi-Protocol Communication Hub: The processor manages multiple interfaces including RS-232C, RS-422/485, and LAN. This flexibility allows the CENTUM VP system to integrate seamlessly with third-party PLCs, gas chromatographs, and power management systems through Modbus or Profibus-DP.

• Robust Data Integrity: An integrated S9129FA battery preserves the 32 MB SDRAM for up to 72 hours during a complete power loss. This ensures the controller retains its current logic state and historical trend data, facilitating a safe and rapid recovery once power returns.

FAQs

• Can the CP451-51 replace an existing CP451-11 module?Yes. The CP451-51 serves as a direct, high-performance replacement for the CP451-11. It offers identical physical dimensions and mounting specifications for a seamless "drop-in" upgrade.

• Does this module require a specific rack?The CP451-51 installs specifically into AFV300, AFV400, AFV10S, and AFV10D Field Control Unit racks. It is not compatible with generic PLC or non-Yokogawa backplanes.

• What is the significance of the ISA G3 option?The G3 rating means the module's electronic components are protected against highly corrosive atmospheres. This is a critical requirement for plants located in industrial zones with high levels of chemical pollutants that would otherwise cause premature hardware failure.

• How do I manage the backup battery?The system provides low-battery diagnostics via the CENTUM VP software. To maintain data retention capabilities, you must recharge the battery for a minimum of 48 hours upon initial installation or after a long period of storage.