Vaisala DMT340 - Manual (Page 84)

User's Guide _______________________________________________________________________
82 ___________________________________________________________________ M210704EN-G
Serial Line Communication
Connect the serial interface by using either the user port or the service
port.
For permanent interfacing to host system, use the User Port. You can
change the serial settings and operate in RUN, STOP, POLL, and
Modbus modes.
For temporary connections use the service port. Service port is always
available with fixed serial settings.
0605-039
Figure 56 Service Port Connector and User Port Terminal on the
Motherboard
The numbers refer to Figure 56 above:
1 = Service port connector
2 = User Port Terminals