YOKOGAWA CP451-10

Technical Specifications

• Core Processor: Dual-core 32-bit RISC, 800 MHz single core frequency
• System Memory: 1 GB ECC DDR3 SDRAM error correction memory
• Onboard Flash Storage: 4 GB industrial grade flash, expandable via CF card up to 8 GB
• Nominal Power Supply: 24 VDC ±10%, maximum input current 2.1 A
• Full Load Power Draw: ≤16 W
• Maximum PID Control Loop Support: 512 independent closed loops
• Total Process I/O Signal Capacity: 8192 digital/analog points per single station
• Configurable Control Cycle Range: 100 ms / 300 ms / 1 s adjustable
• Communication Interfaces: 2 × Gigabit Vnet/IP Ethernet, 1 × RS-232C maintenance port
• Channel Isolation Voltage: 1000 Vrms signal-to-power isolation
• Module Physical Size: 102 mm (W) × 242 mm (H) × 124 mm (D)
• Net Weight: 0.52 kg
• Protection Rating: IP20 rack cabinet installation
• Operating Temperature Band: 0 ℃ ~ +55 ℃ non-condensing
• Storage Temperature Limits: -20 ℃ ~ +70 ℃
• Operating Humidity: 10% ~ 90% RH without dew formation

Function Features

1. Full-function PID algorithm suite with advanced feedforward, ratio control and batch sequencing functions
2. Built-in multi-task real-time OS with ≤10 ms logic response for safety interlock protection
3. Full-spectrum hardware self-diagnosis covering power, memory, bus, communication and I/O channel faults
4. 1:1 hot redundant backup with ultra-fast synchronization protocol for zero-disturbance switchover
5. Gigabit Vnet/IP bus for high-speed inter-station real-time data transmission
6. Online program modification, parameter tuning and firmware upgrade without station shutdown
7. Extended historical data storage supporting 90-day process trend and event log retention
8. Multi-industrial protocol compatibility: Modbus TCP, Modbus RTU, OPC UA for cross-system data exchange

Performance Parameters

• Total floating-point arithmetic capacity: 1600 MIPS dual-core parallel computing
• Redundant main/standby switch time: ≤100 ms with uninterrupted control output
• Max expandable I/O unit quantity: 16 individual I/O racks per CPU station
• Single I/O rack maximum channel capacity: 32 signal points
• Power-off data retention duration: 10 years for flash-stored project configuration
• Factory certified MTBF: 130,000 hours under rated operating environment

Material Composition

• Outer housing: UL94 V-0 flame retardant reinforced ABS plastic
• Main circuit substrate: FR-4 high temperature resistant PCB with gold-plated backplane contact pins
• Heat dissipation assembly: High-density extruded aluminum passive heat sink
• Terminal connectors: Nickel-plated copper alloy anti-oxidation contact terminals

Structural Characteristics

• Universal slide-in modular form factor matching CENTUM CS3000 and VP standard rack slots
• Front panel multi-color LED indicator array displaying RUN, ERROR, NETWORK, REDUNDANT operational status
• Front-mounted removable CF card slot for offline program backup and restoration
• Rear dedicated high-speed differential backplane bus connector for I/O rack data communication
• Dual Gigabit Ethernet RJ45 ports positioned on front panel for simplified wiring layout

Working Principle

Advantage Highlights

1. Dual-core parallel processing architecture delivers superior arithmetic performance for complex multi-loop control
2. ECC error correction memory eliminates data distortion induced by industrial electromagnetic interference
3. Fanless passive cooling design removes mechanical wear failure points for long-term unattended operation
4. Cross-system compatibility with both CS3000 and VP DCS platforms simplifies system upgrade and migration
5. Gigabit network bus eliminates data transmission bottlenecks for large-scale I/O stations
6. High-capacity onboard flash extends historical data storage cycle without external hardware
7. Standardized redundant synchronization protocol minimizes process disturbance during failover events

Applicable Industries

Installation Requirements

1. Install inside universal Yokogawa CENTUM standard metal rack with DIN locking buckle fixed
2. Maintain ≥20 mm vertical clearance above and below module for natural convection heat dissipation
3. Cabinet internal forced air circulation mandatory to stabilize ambient temperature within 0–55 ℃
4. Separate high-power power cables and low-voltage signal wiring with insulating partition boards
5. Cabinet protective grounding resistance controlled ≤4 Ω
6. Avoid installation adjacent to high-power frequency converters, high-voltage contactors and arc furnaces

Usage Precautions

1. Cut rack main DC power supply before plugging/unplugging module to prevent backplane bus short-circuit damage
2. Only deploy official Yokogawa industrial CF storage cards; third-party media causes permanent configuration loss
3. Prevent mechanical impact, scratch or liquid contamination on front panel during maintenance procedures
4. Forbid deployment in environments containing corrosive acid gas, heavy oil mist or conductive metal dust
5. Conduct redundant synchronization performance inspection every 12 calendar months
6. Internal circuit disassembly or component replacement voids all factory warranty terms