Yokogawa YVP20S - Manual (Page 33)

5-4
<Toc> <Ind> <5. FOUNDATION FIELDBUS OVERVIEW>
IM 21B04C50-01E
Finally, to complete the model, ValveNavi is shown, in Figure 5.5, temporarily connected
to the heat exchanger’s Foundation fieldbus wiring at an intermediate point. The Heat
Exchanger Reference Model segment consists of a Heat Exchanger Host in a control
center with a Foundation fieldbus trunk running to two junction boxes. One junction box
has spurs to the flow and temperature control devices and the other connects to the
devices controlling tank level. A power supply with isolation electronics and two
terminators are also shown. The interface cards (NI-FBUS ) used with the ValveNavi
computer must be configured so that it will not interfere with the Heat Exchanger Host.
Figure 5.5 ValveNavi connected as a visitor device
WARNING
Do not connect a ValveNavi PC to an operating segment.
WARNING
Do not cause a short circuit in a working segment while connecting any device.