Vaisala HMT360Series - HMT360 to Zener Barrier Connection

Electrical connections ________________________________________________________________
Vaisala _________________________________________________________________________ 26
HMT360 connected to a zener barrier
a) current signal controller
b) voltage signal controller
FIGURE 4-2 HMT360 connected to a zener barrier.
C H 1
+
+-
-
C H 2
Power Supply
Zener
Barrier
I = 4...20mA
I
Controller
C H 1
+
+
-
Rl
U
Power Supply
Zener
Barrier
Controller
U = R x I
+
-
-
C H 2
HAZARDOUS AREA SAFE AREA
HAZARDOUS AREA
SAFE AREA