Vaisala HMDW110 Kurzanleitung Seite 14

Wiring HMDW110
Wiring Devices with Analog Output
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.
600
300
0
0
Figure 5 HMDW110 Supply Voltage Operating Region
With HMDW110 transmitters ordered with analog output, you must always connect the
humidity measurement current loop (HUM, terminals 5 and 6) to power the transmitter.
Connecting the temperature measurement current loop (terminals 7 and 8) is optional.
2 x 4 ... 20 mA
R
8 T -
7 T+
6 HUM-
5 HUM+
Figure 6 HMDW110 Wiring, Analog Output
Wiring Both Current Loops with a Single Power Supply
8 T -
7 T+
6 HUM-
5 HUM+
Figure 7 HMDW110 Wiring with Single Power Supply
14
10
Supply voltage (VDC)
= 0 ... 600 Ω
L
A
A
A
A
Operating
region
20 28
-
Power supply
+
-
Power supply
+
2 x 4 ... 20 mA
R = 0 ... 600 Ω
L
-
Power supply
+
M211692EN-C