Vaisala HMDW110 - Figure 10 HMDW110 Supply Voltage Operating Region; Figure 9 HMDW110 Wiring with Single Power Supply; HMDW110 Power Supply Requirements; Wiring both Current Loops with a Single Power Supply

3.5.1 Wiring Both Current Loops With a Single Power Supply
8 T -
7 T+
6 HUM-
5 HUM+
A
A
+
-
Power supply
2 x 4 ... 20 mA
R
L
= 0 ... 600 Ω
Figure 9 HMDW110 Wiring With Single Power Supply
3.5.2 HMDW110 Power Supply Requirements
HMDW110 series transmitters are designed for a supply voltage range of 10 ... 28 VDC. The
minimum required voltage depends on the loop resistance (0 ... 600 Ω) as shown below.
Supply voltage (VDC)
Loop resistance (Ω)
600
0
0 20 2810
300
Operating
region
Figure 10 HMDW110 Supply Voltage Operating Region
Chapter 3 – Installation
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