Description

Yokogawa VF702 Control Bus Interface Card

The Yokogawa VF702 also cataloged as the VF702 Control Bus Interface Card, operates as a dedicated hardware component for physical and electrical interfacing of V net control bus communication within CENTUM VP / CENTUM CS 3000 system architectures.

Configured for deterministic V net signal coupling in Yokogawa control bus environments, the Yokogawa VF702 (VF702 Control Bus Interface Card) provides direct PCI Express to 10BASE-2 electrical execution for dual-bus coaxial transmission paths.

HardwareSpecifications

Parameter	Specification
ModelBrand	Yokogawa VF702
Origin	JAPAN
Weight	Approx. 0.15 kg
Dimensions	22 mm x 126.5 mm x 193.54 mm
PowerConsumption	3.3 V DC ±9%, max 2.4 A
Interface Type	PCI Express x1 to V net control bus
Transmission Standard	10BASE-2 compliant
Connector Type	BNC (BUS 1 / BUS 2)
Cable Method	Coaxial via YCB146 T-connector

Process Control Bus Integration Characteristics

Within Yokogawa distributed control environments, the VF702 interface layer is aligned with system-level process data exchange structures involving 4-20 mA HART loop protocol mapping and control station communication alignment. The module architecture is typically deployed in configurations where FOUNDATION Fieldbus / Profibus PA connectivity abstraction and channel-to-channel isolation concepts are maintained at the system integration layer. These characteristics define signal segregation behavior between PCI Express host execution and V net physical bus transmission domains.

FrequentlyAskedQuestions

Q: Does the VF702 support hot-swap removal during system operation?
A: No hot-swap capability is specified. Removal requires system shutdown to avoid PCI Express bus and V net communication disruption.

Q: What is the electrical isolation boundary of the VF702 interface?
A: Isolation is implemented between PCI Express host domain and 10BASE-2 V net physical layer; external bus grounding must be managed at system level.

Q: Can VF701 and VF702 operate on the same control bus?
A: Yes. VF702 is backward compatible with VF701 and mixed operation on the same V net segment is supported.

Field Installation Guidelines

Coaxial cabling must follow 10BASE-2 topology rules using BNC T-connectors (Model YCB146). Proper 50 ohm termination must be applied at both ends of the bus segment to prevent signal reflection. Cable shielding must be grounded at designated points only to avoid ground loop formation. PCI Express insertion must be performed with power off, ensuring full seating in x1 to x16 compatible slots. BUS 1 and BUS 2 redundancy paths must be routed physically separated to reduce cross-coupling risk.

Specifications

• Brand: Yokogawa

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems