Appendix A ______________________________________________________________ Networking
VAISALA______________________________________________________________________ 187
APPENDIX A
NETWORKING
Connecting Several Transmitters on Same Bus
There are two options for connecting several transmitters on the same
bus:
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 transmitter as described in Chapter 5
Wiring and Power Management, on page 53. Remember to
combine the two "Data in/out" wires of each transmitter either in
the internal screw terminal inside or outside the transmitter.
2. In the data logger end, combine the "GND for data" wires of each
transmitter to the logger "GND for data" wire. Connect the "Data
in/out" wires of each transmitter to the logger "Data" wire.
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