Chapter 6 ________________________________________________________ Connection Options
VAISALA_______________________________________________________________________ 77
Connection through M12 Bottom
Connector or Screw Terminal
Checking or changing the device settings can be done through the M12
bottom connector or screw terminal.
To do this, you must know the device communication settings, have a
suitable cable between the device and the host, and, if needed, use a
converter (for example, RS-485/422 to RS-232, if the host is a PC). The
table below shows the factory default settings:
NOTE
Changes to the serial interface/communication protocol/baud settings
take place when disconnecting the service cable or when resetting the
transmitter.
If these settings are not changed during the service connection session,
the original main port settings (at M12 and screw terminals) are
returned as soon as the service cable is disconnected from either end.
Table 17
Default Serial Communication Settings for M12/
Screw Terminal Connection
Serial Interface
Serial Settings
SDI-12
1200 baud, 7, E, 1
RS-232 ASCII
19200 baud, 8, N, 1
RS-485 ASCII
19200 baud, 8, N, 1
RS-422 ASCII
19200 baud, 8, N, 1
RS-422 NMEA
4800 baud, 8, N, 1
