The Yokogawa CP703 Circuit Board (also cataloged as a Field Control CPU) is part of Yokogawa’s CENTUM/FA series control systems. It functions as the central processing unit for local control loops, enabling high‑speed communication with I/O modules and ensuring stable process control in industrial environments.
Specifications
Manufacturer: Yokogawa Electric Corporation
Model Number: CP703
Type: Circuit Board / Field Control CPU
Dimensions: 320 × 210 × 60 mm
Weight: 2.5 kg (industrial version) / 0.48 kg (compact version)
Power Supply: 24 VDC ±10%
Power Consumption: 6–12 W (typical)
Output Voltage: 12 VDC auxiliary supply
Memory Capacity: 128 KB RAM, 256 KB ROM
Communication Protocols: YS/NCS, Modbus, proprietary FA‑bus
Operating Temperature: −20 °C to +60 °C (industrial spec) / 0 °C to +55 °C (CPU spec)
Humidity Range: 10–90% RH, non‑condensing
Isolation: Optical/electrical isolation between field and logic circuits
Mounting: Rack or panel mounting
Features
Central CPU Function: Executes logic and process control tasks in field stations
High‑Speed Communication: Interfaces with I/O modules via backplane bus
Diagnostic Tools: Built‑in LEDs and self‑diagnostics for troubleshooting
Industrial Reliability: Designed for continuous operation in harsh environments
Protocol Flexibility: Supports Modbus and Yokogawa proprietary protocols for integration
Compact Design: Fits standard Yokogawa racks, suitable for space‑limited installations
