Vaisala PWD22 - Table 10 Commands for Changing Default Settings; Table 11 Commands for Displaying and Changing Parameters; Weather Parameters

USER'S GUIDE ____________________________________________________________________
44 __________________________________________________________________ M210543EN-F
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Figure 15 Relay Connection: External Relay Supply
You can also use
Ext Vb voltage, nominally 12V, to supply the relays.
Then PWD limits the corresponding current
to < 200 mA.
RELAY Command
Set/display the relay control states.
When you type the following:
>RELAY
The result is the following:
RELAYS OFF OFF OFF
All relay controls can be set on by typing the following:
>RELAY ON
Relay control 1 can be set on until ESC is pressed. See the example
below:
>RELAY 1 ON
X4-6
X4-7
X4-5
DGND
+5...12V supply
Control 1
Relay 1
Relay 2
Relay 3
wires: X4-5 VIO
X4-6 GRY/PNK
X4-7 RED/BLU
X4-8
PWC board
Cable
Box
GND (12V)