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Overview
The Yokogawa VC401-11 is a dedicated Vnet/IP coupler module engineered for CENTUM VP distributed control systems. It enables deterministic data exchange and unified time synchronization between control nodes, ensuring consistent system behavior across complex plant networks. The module is optimized for high-reliability environments where event accuracy and communication stability are critical.
Designed for both standalone and redundant architectures, the VC401-11 serves as a core communication bridge between Vnet/IP and legacy Vnet or VL-net segments within Yokogawa DCS infrastructures.
Core Functions
The VC401-11 provides real-time data coupling and timestamp alignment between connected subsystems. With millisecond-level time resolution, it supports precise sequence-of-events recording, fault analysis, and synchronized control execution. Its architecture minimizes communication latency while maintaining deterministic performance under continuous operation.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | VC401-11 |
| Product Category | Vnet/IP Coupler Module |
| Compatible System | Yokogawa CENTUM VP |
| Network Interfaces | Vnet/IP, Vnet, VL-net |
| Vnet/IP Communication Speed | 100 Mbps |
| Vnet / VL-net Speed | 10 Mbps |
| Maximum Throughput | Up to 128 Mbps |
| Maximum Connection Distance | 10 m |
| Maximum Connectable Units | 9 nodes |
| Time Synchronization Accuracy | 1 ms |
| Power Supply Range | 12–24 V DC |
| Power Consumption | 1.2 W |
| Operating Temperature | -10 to +50 °C |
| Mounting Form Factor | Control cabinet installation |
| Dimensions | 152 × 127 × 38 mm |
| Weight | 0.2 kg |
Reliability and Redundancy
The VC401-11 supports redundant system configurations, allowing seamless operation during module or network faults. This capability is essential for continuous-process industries where system availability and fault tolerance are mandatory.
Typical Applications
This module is commonly deployed in large-scale DCS installations requiring synchronized control and monitoring, including oil and gas processing units, chemical production facilities, power generation plants, and high-availability manufacturing systems.
Frequently Asked Questions
Can the VC401-11 be used in redundant CENTUM VP systems?
Yes. The VC401-11 is designed to operate in both single and dual-redundant configurations.
Does the module support precise event logging?
Yes. It provides time synchronization with 1 millisecond resolution, enabling accurate sequence-of-events analysis.
Is this module compatible with legacy Yokogawa networks?
Yes. It supports interoperability between Vnet/IP and traditional Vnet or VL-net architectures.
