Vaisala Hydromet Data Collection Platform - Manual (Page 150)

User's Guide ______________________________________________________________________
148 __________________________________________________________________M210784EN-E
1003-030 Figure 70 Digital I/O Module Wiring Diagram (Digital
Outputs)
Fixed Line Modem DMX501
The fixed line modem module can be configured for a point-to-point
line or for a multidrop modem network. If a modem is configured for
multidrop use, the outgoing carrier is valid only during transmission. If
the QML logger is the master in the multidrop network, the fixed line
modem can be normally configured for point-to-point use.
1006-104 Figure 71 Fixed Line Modem Wiring Diagram
NOTE The digital I/O module can only be connected to the QML201 logger
or newer. The type of the logger can be checked with the VER
command.