User's Guide

2.7. Interface to a Davis Vantage Pro Console
The following instructions are valid when the M717 RTU is connected to a Vantage Pro weather station
(manufactured by Davis Instruments). The M717 RTU can be installed both indoors and outdoors.
Note: The M905 Connexion Box, the Davis Console, as well as the mains adapter are not intended for outdoors
installation!
To connect the M717 RTU to the Vantage Pro Console, a WeatherLink data cable from Davis Instruments is
required. Note that for this configuration the data collected by the Davis Console is already logged into
the WeatherLink data logger, thus the data passes through two levels of storage: one offered by the Davis
System and a second by the M717 RTU.
The following diagram depicts the connections between the M717 RTU, the M905 connexion box and the
mains adapter.
The configuration of the Davis Console on the M2M Gateway is done as for the SDI-12 sensors, but it is
considerably simplified as a suitable template is already available.
2.8. Interface to a Thies TDL14 or DL16 Data Logger
The Thies data loggers implement a proprietary serial protocol. The TDL14 logger supports the RS-232
and RS-485 full duplex modes, while the DL16 logger additionally supports the RS-485 half-duplex mode.
The communication with the logger is done using a 10 m cable attached to the MPI connector.
Before proceeding with the actual installation in the field, it is recommended to verify, and possibly
modify the specific attributes that define the MPI functionality. Proceed as follows (you need
administrator rights to add an RTU):
•
Log-in on to the Metrilog M2M Gateway at https://www.metrilog.net.
•
Navigate to the RTU that must be verified/modified and select it.
•
On the right pane, select the tab “Attributes”.
•
The attribute mpiBaudRate determines the baud rate of the MPI interface: set it to fit the baud rate
of the data logger (default 9600 Baud; the DL16 supports also higher baud rates).
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