Panametrics PanaFlow MV80, User Manual, Page: 119 / 184

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 Figure 119 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”