Vaisala PTU300 Guía de usuario Pagina 41

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Chapter 3 _______________________________________________________________ Installation
VAISALA _______________________________________________________________________ 39
Connections to a 24 VAC Power Supply
Separate floating supply for each transmitter is recommended (see the
upper part of Figure 23 below). If you have to connect several
transmitters or other instruments to one AC supply, the phase (~) must
always be connected to the (+) connector of each transmitter (see the
lower part of Figure 23).
CAUTION
24 VAC POWER SUPPLY USE
To prevent fire and/or damage, if either 24 VAC wire is grounded or
connected to a "-", "0", or "GND" terminal of any other device, you
must connect the same wire on the "-" terminal also on this
instrument.
0703-041
Figure 23 Connections to 24 VAC Power Supply
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