Description
The Yokogawa VI702 is a high-performance control bus interface card designed to link PC/AT-compatible computers—such as Human Interface Stations (HIS) and engineering stations—directly to Yokogawa CENTUM VP distributed control system (DCS) networks via Vnet/IP. It functions as a hardware bridge, handling high-speed deterministic network traffic between standard operating systems and the plant-wide control bus.
Technical Specifications
| Parameter | Value |
| Manufacturer | Yokogawa Electric Corporation |
| Product Type | Vnet/IP Interface Card (Control Bus Interface) |
| System Compatibility | CENTUM VP, CENTUM CS 3000 (PC-based stations) |
| Communication Speed | 1 Gbps Full-Duplex |
| Transmission Standard | 1000BASE-T compliance (UTP CAT5e cable) |
| Maximum Distance | 100 m (between VI702 and Layer 2 switch) |
| Bus Interface Slot | PCI Express (CEM Specification 1.0a x1 to x16 slots, 2.5 GT/s signaling) |
| Power Supply Voltage | 3.3 V DC (\pm 9\%) supplied via PCI Express slot |
| Current Consumption | Max. 2.5 A |
| Physical Dimensions / Weight | Approx. 0.18 kg |
| Diagnostic Indicators | LED status lights for RDY (Ready), RCV (Receive), and SND (Send) |
Availability and Commercial Terms
- Condition Options: New Original (Factory Sealed), New Surplus, or Refurbished (fully tested)
- Lead Time: 1 to 3 business days for stock items; 2 to 4 weeks for factory-sourced surplus
- Warranty: 12-month standard replacement warranty from date of shipment
- Pricing Note: Listed price is indicative, not final. Price subject to market conditions; contact us for a firm quote.
Engineering and Integration Notes
The VI702 is a foundational hardware component for operator and engineering nodes interacting with Vnet/IP control networks.
- Slot Compatibility: This card requires a physical PCI Express slot (x1 through x16). It is not compatible with legacy PCI slots. Verify motherboard layout and available PCIe slots on custom or third-party industrial PCs before deployment.
- Network Cabling: Use standard Category 5e (CAT5e) unshielded twisted-pair (UTP) cables with RJ45 connectors. Ensure proper separation from high-voltage power conduits to prevent packet loss or CRC errors at 1 Gbps transmission speeds.
- Redundancy Configuration: In dual-redundant Vnet/IP architectures, dual VI702 cards are typically installed in separate physical slots within the host computer to support independent primary (DOMAIN/BUS1) and secondary (BUS2) network pathways.
Frequently Asked Questions
Can the VI702 card be used in standard office PCs?
While the card fits physically into any standard PCI Express x1 to x16 slot on a PC/AT-compatible motherboard, operational software integration requires Yokogawa CENTUM system software (such as CENTUM VP HIS software packages) installed on the operating system to recognize and drive the hardware layer.
What do the front-edge LED indicators signify?
- RDY: Illuminates green when the card passes internal hardware diagnostics and operates normally.
- RCV: Flashes or lights when valid data frames are received from the control network bus.
- SND: Flashes or lights when data is actively transmitted from the station onto the Vnet/IP bus.
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