
PanaFlow™ MV80, MV82 & MV84 User’s Manual
107
Chapter 4. Serial Communications
4.2.4
Wiring
An RS485 daisy chained network configuration, as shown in
below, is recommended. Do not use a star, ring,
or cluster arrangement.
RS-485 –
RS-485 +
RS-485 GND
RS-485 –
RS-485 +
RS-485 GND
RS-485 –
RS-485 +
RS-485 GND
RS-485 –
RS-485 +
RS-485 GND
RS-485 Master
Other Device 1
Vortex Meter
Other Device 2, etc.
Figure 119: RS-485 Modbus Wiring
4.2.5
Pin Labeling Among Devices
•
RS-485 –
= “A” = “TxD–/RxD–” = “Inverting pin”
•
RS-485 +
= “B” = “TxD+/RxD+” = “Non-Inverting pin”
•
RS-485 GND
= “GND” = “G” = “SC” = “Reference”
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