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- Yokogawa
- VF702 S2
- Control Bus Interface Card
- Japan
- 22 x 126.5 x 193.54 mm
- 0.15 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Yokogawa VF702 S2 is a control bus interface card used in Yokogawa distributed control and safety systems.
It is designed to provide communication between a PC-based engineering station (SENG) and Yokogawa V net / control bus networks.
This card is widely used in CENTUM and ProSafe-RS system environments, where it enables reliable communication between engineering tools and field control stations.
The “S2” version represents a revised hardware/firmware generation, improving compatibility and stability within control network configurations.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Yokogawa |
| Model | VF702 S2 |
| Product Type | Control Bus Interface Card |
| System Role | V net / control bus communication interface |
| Network Type | V net (10BASE-2 compatible control network) |
| Host Interface | PCI Express (x1 slot compatible) |
| Communication Medium | Coaxial cable (BNC / T-type connector system) |
| Max Transmission Distance | Up to 185 m (10BASE-2 cable system) |
| Function | Interface between PC and control bus network |
Physical Specifications
| Parameter | Details |
|---|---|
| Dimensions | 22 × 126.5 × 193.54 mm |
| Weight | 0.15 kg |
Function and Working Principle
The VF702 S2 functions as a communication bridge between a PC-based engineering station and Yokogawa control networks.
Core Working Principle
- Installed in a PCI Express slot of an engineering PC
- Connects to V net control bus via BNC/T-type coaxial cabling
- Transmits and receives real-time control system data
- Enables engineering access to field control stations (FCS / SCS)
- Supports deterministic industrial communication over control bus architecture
The card ensures stable communication between engineering software and distributed control system nodes.
Key Functions
- Provides interface between PC and V net control network
- Enables engineering and maintenance access to control systems
- Supports real-time data exchange with control stations
- Allows system configuration, monitoring, and diagnostics
- Enables communication with ProSafe-RS / CENTUM environments
- Supports dual-bus communication architecture (depending on system design)
System Role
Within a Yokogawa control architecture:
- Field devices send signals to I/O modules
- Control stations process field data
- VF702 S2 enables PC-to-system communication via V net
- Engineering station accesses control logic and system status
- Maintenance and diagnostics are performed through this interface
Industrial Applications
The VF702 S2 is used in industrial automation environments such as:
- Oil and gas production facilities
- Petrochemical plants
- Refinery control systems
- Chemical processing plants
- Power generation stations
- Distributed control system engineering stations
- Safety system maintenance environments
Key Features
- PCI Express-based industrial communication card
- Supports V net control bus communication
- Compatible with Yokogawa engineering systems
- Stable deterministic communication performance
- Industrial-grade reliability for control system integration
- Supports configuration and maintenance operations
Advantages
- Enables direct engineering access to control networks
- Stable communication with Yokogawa DCS/SIS systems
- Easy integration into engineering PCs
- Reliable industrial communication over long distances
- Supports maintenance and diagnostics workflows
Installation Notes
- Installed in PCI Express x1 slot (compatible with x1–x16 slots)
- Must use approved coaxial cabling (T-type connector system)
- Requires correct station addressing configuration
- Must follow electrostatic discharge (ESD) protection procedures
- Configuration must be aligned with system domain settings
FAQ
Q: What is VF702 S2 used for?
It is used to connect engineering PCs to Yokogawa V net control systems.
Q: Is it a network card?
Yes, but it is specifically designed for industrial control bus communication, not standard Ethernet.
Q: What systems does it support?
CENTUM CS, CS 3000, and ProSafe-RS systems.
Q: What is its main role?
It enables communication between engineering stations and distributed control system networks.
Conclusion
The Yokogawa VF702 S2 Control Bus Interface Card is a critical communication module for industrial control system engineering.
It provides stable and reliable connectivity between engineering stations and Yokogawa V net architectures, enabling configuration, monitoring, and maintenance of distributed control and safety systems.