Yokogawa VI702 Vnet/IP Interface Card
The Yokogawa VI702, also cataloged as the VI702 Vnet/IP Interface Card, operates as a dedicated hardware component for deterministic, dual-redundant data communication within CENTUM VP platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | VI702 |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 0.18 kg |
| Dimensions | 130.0 mm x 107.0 mm x 32.0 mm |
| Operating Temp | 0 to +55 deg C |
| Power Consumption | 2.5 A at 3.3 VDC maximum (3 to 5 W) |
| System Compatibility | CENTUM VP / CS3000 |
| Communication Protocol | Vnet/IP (100 Mbps deterministic network) |
| Bus Interface | CAT5e Ethernet connector (RJ45) |
| Status Indicators | RDY (Card Normal), RCV (Signal Detect), SND (Signal Transmit) |
| Redundancy | Dual-redundant bus channels with automatic failover |
Deterministic Network Bus & Channel-to-Channel Isolation
The module incorporates dedicated high-speed communication controllers to establish real-time Vnet/IP control network connectivity across Field Control Stations (FCS) and Human Interface Stations (HIS). High-frequency pulse transformers provide complete galvanic and optical channel-to-channel isolation between internal processing logic and external CAT5e Ethernet signal lines. This physical isolation layer eliminates ground loop currents and protects backplane bus logic from high-voltage field transients. The interface engine handles packet validation and deterministic bus access timing without burdening the host processor.
Frequently Asked Questions
Q: What physical status indicators confirm correct communication hardware startup on the front panel?
A: The RDY LED illuminates green when internal self-diagnostics confirm normal module hardware operation. The RCV LED blinks during active control bus signal reception, and the SND LED illuminates during bus transmission execution.
Q: Can maintenance personnel hot-swap the card during online system operation?
A: Field technicians can replace the card in redundant configuration setups without shutting down the node chassis. Ensure the secondary redundant Vnet channel actively handles control bus traffic before extracting the faulty module from the backplane connector slot.
Field Installation Guidelines
Mount the interface module directly into the designated node interface slot within the FCS or HIS base unit chassis. Ensure the backplane guide rails align properly before applying firm manual force to engage the edge connector fully into the bus socket.
Connect screened CAT5e network cables to the RJ45 Ethernet connectors on the card faceplate. Keep signal cable runs below 10 m per copper segment to avoid signal attenuation and timing jitter. Route network cabling inside dedicated, grounded metallic wireways separated from 230 VAC high-current motor power distribution channels. Connect the shield braid of all network cables to the station reference ground to ensure transient noise suppression across the network bus.
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Engineering Lead, GermanyTop-tier Service and Quality
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Operations Director, GermanyRelated Products
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