Vaisala hmdw110 series, Быстрое руководство

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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.
Supply voltage (VDC)
Loop r
esis
tanc
e (Ω)
600
0
0 20 28 10
300
Operating
region
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.
8 T -
7 T+
6 HUM-
5 HUM+
A
+
-
A
Power supply
+
- Power supply
2 x 4 ... 20 mA
R
L
= 0 ... 600 Ω
Figure 6 HMDW110 Wiring, Analog Output
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 7 HMDW110 Wiring with Single Power Supply
14 M211692EN-C