Appendix a networking, Connecting several wmt52s on the same bus, Sdi-12 serial interface – Vaisala WMT52 User Manual
Page 123: Wiring, Appendix a, If you need to change the device address, see, Networking, Sdi-12 serial interface wiring
Appendix A ______________________________________________________________ Networking
VAISALA______________________________________________________________________ 121
APPENDIX A
NETWORKING
Connecting Several WMT52s on the Same Bus
Connecting several WMT52s on the same bus is possible in two ways:
1.
Using SDI-12 serial interface and communication protocol, and
2.
Using RS-485 serial interface and one of the following
communication protocols: ASCII or NMEA 0183 v3.0.
SDI-12 Serial Interface
Wiring
1.
Make the SDI-12 wiring in WMT52 as described in
Wiring and Power Management, on page 39
. Remember to
combine the two "Data in/out"wires of each WMT52 either in the
internal screw terminal inside or outside the sensor.
2.
In the data logger end, combine the "GND for data" wires of each
WMT52 to the logger "GND for data" wire. Connect the "Data in/
out" wires of each WMT52 to the logger "Data" wire.