Vaisala HUMICAP HMW92 - Connecting a Common AC Power Supply to Several Transmitters; Figure 25 Connecting a Common AC Power Supply

Chapter 3 ________________________________________________________________ Installation
VAISALA ________________________________________________________________________ 33
Connecting a Common AC Power Supply
to Several Transmitters
If you are connecting a common 24 VAC power supply to several
transmitters, make sure to connect the same terminal to +Vs and –Vs on
all transmitters. This will avoid a short-circuit through the shared
common line at the controller; see Figure 25 below.
1112-026
Figure 25 Connecting a Common AC Power Supply
+Vs OUT
-Vs
+Vs OUT
-Vs GND
Shared
common
line
HMW90
HMW90
CONTROLLER
24 VAC
Su
pp
ly
voltage
S
upp
l
y
voltage
Signal
output
Signal
output
GND