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The VF702 is a high-performance network interface card designed to bridge a PC/AT compatible computer (such as an engineering or operator workstation) directly to the Yokogawa proprietary V net control bus. By installing the VF702 card into a standard PCI Express (PCIe) slot, the host computer gains real-time, deterministic, and highly reliable data exchange capabilities with Field Control Stations and other nodes within the DCS environment. It is a vital component for ensuring seamless industrial process automation and monitoring.
10BASE-2 Ethernet standard
Fully compliant with the PCI Express CEM Specification 1.0a
Operates on a x1 lane width with a signaling rate of 2.5 GT/s
The VF702 serves as a dedicated hardware translator that solves this communication bottleneck. By integrating standard PCI Express (PCIe) computing platforms directly into the proprietary Yokogawa automation infrastructure, the card allows engineers to leverage modern high-speed computing power while maintaining full utilization of legacy control networks, successfully extending the operational lifespan and maximizing the return on investment (ROI) of existing plant assets without necessitating a total system overhaul.
Once seated firmly within the host machine's motherboard, the VF702 acts as a high-reliability communication gateway that performs continuous, bidirectional signal conversion. It translates high-throughput data packets from the host workstation's internal PCI Express bus architecture into the specialized, time-deterministic protocol required by the V net network, and vice versa.
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
YOKOGAWA VF702 Control Bus Interface Card Manuals, Datasheets, Drivers, Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Oil & Gas Refining
In refineries, the VF702 connects operator workstations (HIS) to Field Control Stations (FCS) to enable centralized, real-time monitoring and control of high-risk, high-throughput cracking and distillation processes.
Petrochemicals & Polymer Production
Used in continuous production lines like ethylene cracking, polyethylene (PE), and polypropylene (PP) to transmit critical pressure, temperature, and flow data over V net, ensuring the safety and stability of complex exothermic reactions.
Thermal & Nuclear Power Generation
In power plants, the VF702 bridges engineering stations with boiler and turbine control systems (DCS) to facilitate real-time data exchange for generator speed regulation, load distribution, and safety interlocking systems.
Pharmaceuticals & Biotechnology
In FDA-compliant pharmaceutical plants, it links batch control management software with field hardware for fermenters and reactors, ensuring precise recipe execution and uninterrupted production audit trails.
Pulp & Paper Industry
In the control of large paper machines and digesters, the VF702 is responsible for transmitting high-frequency closed-loop control signals used for moisture, basis weight (QCS systems), and paper tension adjustments.
Mining & Mineral Processing
In mineral processing plants, it is used for the centralized scheduling of crushers, ball mills, flotation cells, and tailings treatment systems, ensuring heavy-duty smooth operation and interlocking protection of equipment.
When using the VF702 interface card, it is strictly prohibited to insert it into legacy PCI slots. Ensure the host computer is powered off before physical hardware handling or adjusting the onboard DIP switches (domain/station numbers). Due to its reliance on the 10BASE-2 standard, sharp bends in coaxial cabling (e.g., YCB146) must be avoided, and 50-ohm terminators must be installed at both ends of the network segment to prevent signal reflection. Furthermore, deploying dual-network redundancy is highly recommended, alongside regular monitoring of the onboard RDY, RCV, and SND LEDs to verify hardware health and real-time communication status.
Alternative Names
Alternative Names
VF7O2VI702YCB146VF702 S1
Technical notes
Technical notes
The YOKOGAWA VF702 is a high-performance control bus interface card based on the PCI Express (x1) architecture, specifically designed to connect DCS workstations to the V net control network. Supporting the 10BASE-2 transmission standard and offering full backward compatibility with its predecessor (VF701), it delivers strict real-time determinism and superior noise immunity. Additionally, the card features onboard LEDs for intuitive hardware self-diagnostics and communication status tracking, serving as a core component to ensure continuous, highly stable, and efficient industrial automation communications.
What is the YOKOGAWA VF702 Control Bus Interface Card?
The VF702 is a network interface card installed in a computer's PCI Express slot, specifically designed to connect DCS workstations (such as engineering or operator stations) to Yokogawa's proprietary V net control bus.
What is the primary function of the YOKOGAWA VF702?
Its core function is to perform data translation between the workstation's internal PCIe bus and the system's V net control bus, enabling real-time, deterministic transmission of operation commands, process data, and alarms.
Which Yokogawa systems are compatible with the YOKOGAWA VF702?
It is primarily compatible with CENTUM CS 3000 and CENTUM VP Distributed Control Systems (DCS), requiring software version R3.05 or later.
How do you physically install the YOKOGAWA VF702?
With the computer powered off, vertically insert the VF702 into any available PCI Express slot (from x1 to x16) on the motherboard, and secure the bracket with a screw.
hat network transmission standard does the YOKOGAWA VF702 use?
It complies with the 10BASE-2 industrial Ethernet standard, which offers superior noise immunity in industrial environments.
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