Vaisala Hydromet Data Collection Platform - Manual (Page 27)

Chapter 2 __________________________________________________________ Product Overview
VAISALA_______________________________________________________________________ 25
Accessories
Sensor Multiplexer
0802-049 Figure 5 Sensor Multiplexer QMU101
The QML logger provides the possibility to extend the measuring
capacity with the optional QMU sensor multiplexer. It is designed to
increase the number of analog measurement channels with eight 16-bit
analog channels and two 12-bit analog channels. The unit increases the
measuring capacity with ten differential measurements or alternatively
with 20 single-ended measurements.
The unit interfaces to the logger via the RS-485 line, and is also located
inside the enclosure. The unit conforms to the same environmental
immunity and emission standards as the logger.
NOTE The multiplexer unit makes only analog measurements.
NOTE The multiplexer unit can only be connected to the QML201 logger or
newer. The type of the logger can be checked with the VER command.