Description
1. Overview
The Yokogawa VC401-10 is a dedicated Vnet/IP bus coupling communication module for the Yokogawa CENTUM VP distributed control system. Installed in the CPU slot of VP series controllers, it serves as the core real-time communication bridge between the main controller and field I/O modules, realizing high-speed bidirectional interaction of control commands, process parameters and equipment status data.
Adopting Yokogawa proprietary Vnet/IP real-time industrial Ethernet protocol based on optimized UDP/IP architecture, the module features ultra-low communication delay, strong anti-interference capability and undisturbed redundant switching. It fully meets the strict real-time control requirements of process industries and is widely used in petrochemical, oil & gas, thermal power and metallurgical continuous production plants to ensure high-reliability and synchronous operation of DCS systems.
2. Technical Features
2.1 Proprietary Vnet/IP Real-Time Bus, Ultra-Low Delay
Equipped with Yokogawa exclusive Vnet/IP industrial real-time protocol, optimized on the basis of standard Ethernet UDP/IP mechanism. It eliminates non-real-time jitter and transmission delay of commercial Ethernet, realizing millisecond-level high-speed data interaction and synchronous command response, perfectly adapting to high-precision closed-loop process control and interlock logic scenarios.
2.2 Native Redundant Network Support, Undisturbed Switching
Fully compatible with CENTUM VP dual redundant Vnet/IP network architecture. It monitors link status in real time and automatically switches to redundant links without data interruption or system disturbance when single-link faults such as disconnection and signal abnormality occur, effectively avoiding system offline and control failure caused by single-point network faults.
2.3 Standard 100M Ethernet Interface, Flexible Deployment
Built-in 1-channel 100BASE-TX RJ45 interface with automatic MDI/MDI-X identification, no manual wire sequence adjustment required. It supports industrial shielded network cables and standard cabinet wiring specifications, enabling convenient and rapid network deployment, system expansion and module replacement.
2.4 Full-Coverage Intelligent Network Diagnosis
Real-time diagnosis covers link disconnection, packet loss, transmission timeout, port abnormality and communication failure. Local LED indicators display operating status intuitively, and fault logs and codes are uploaded to the upper system in real time, supporting rapid fault location and predictive maintenance.
2.5 Industrial-Grade Anti-Interference & Harsh Environment Adaptation
Optimized EMC circuit design with multi-stage hardware filtering and surge suppression resists high-frequency electromagnetic interference from on-site frequency converters and power equipment. Industrial three-proof coating and strict component aging tests ensure long-term stable operation under alternating temperature, humidity and vibration conditions.
2.6 Plug-and-Play & Hot-Swap Maintenance
100% compatible with CENTUM VP controller slots, bus protocols and configuration software. Supporting online hot-swap replacement without system shutdown or logic interruption, it greatly reduces operation and maintenance risks and meets 24/7 continuous production requirements.
3. Detailed Specifications
3.1 Basic Hardware Parameters
- Model: VC401-10
- Manufacturer: Yokogawa Electric Corporation
- Series: CENTUM VP DCS Vnet/IP Bus Coupling Module
- Type: Industrial Real-Time Ethernet Communication Coupler
- Applicable System: Yokogawa CENTUM VP Distributed Control System
- Installation: VP Series Controller CPU Dedicated Slot
- Core Architecture: Vnet/IP Real-Time Transmission, Redundant Network Adaptation
- Communication Protocol: Yokogawa Proprietary Vnet/IP (UDP/IP Real-Time Extension)
- Features: Auto MDI/MDI-X, Undisturbed Redundant Switching, Hot-Swap Support
3.2 Core Communication Performance
- Physical Interface: 1 × RJ45 100BASE-TX Ethernet Port
- Communication Rate: 100Mbps High-Speed Real-Time Transmission
- Interface Feature: Automatic MDI/MDI-X Polarity Adaptation
- Transmission Protocol: Vnet/IP Industrial Real-Time Extended Protocol
- Delay Performance: Millisecond-Level Ultra-Low Latency, High Data Synchronization
- Redundancy Performance: Automatic Fault Link Isolation & Seamless Switching
- Stability: Exclusive Real-Time Scheduling, No Packet Loss or Data Jitter
3.3 Functional Parameters
- Operation Mode: 24/7 Uninterrupted Real-Time Communication Operation
- Maintenance: Online Hot-Swap Replaceable, Debug-Free On-Site
- Diagnosis: Full-Coverage Detection of Link, Port and Transmission Faults
- Compatibility: Fully Compatible with CENTUM VP Series System Hardware & Software
- Redundancy Logic: Single-Link Fault Zero Impact on Overall System Communication
3.4 Environmental Parameters
- Operating Temperature: 0℃ ～ +60℃
- Storage Temperature: -20℃ ～ +70℃
- Operating Humidity: 10%～90%RH (Non-Condensing)
- Environmental Resistance: Dust-Proof, Moisture-Proof, Vibration & EMC Anti-Interference
- Applicable Scenarios: Petrochemical, Thermal Power, Metallurgy Industrial Central Control Room
4. Operating Principle
The Yokogawa VC401-10 operates based on Vnet/IP real-time Ethernet transmission, redundant link fault tolerance and full-link intelligent diagnosis principles. Installed on the VP controller CPU slot, it establishes a dedicated real-time communication channel between the controller and the system network.
Field process data collected by I/O modules is uploaded to the main controller through the VC401-10 module via Vnet/IP bus, while control commands and interlock logic are synchronously issued to field I/O units and actuators. Adopting exclusive real-time scheduling algorithm, it eliminates commercial Ethernet delay and jitter, ensuring high-precision synchronous control of the entire DCS system.
Under redundant network architecture, the module monitors dual-link status in real time and switches instantly upon single-link failure without data loss or system disturbance. Continuous self-diagnosis of ports and transmission links ensures long-term stable network operation and provides reliable communication guarantee for industrial process automatic control.
5. Application Scenarios
1. Core network communication guarantee for petrochemical CENTUM VP system plants.
2. Redundant network communication for oil & gas storage and transmission station control systems.
3. DCS system networking and real-time control for thermal power and cogeneration units.
4. High-precision closed-loop control real-time communication scenarios for process industries.
