Connections, Table 8, Caution – Vaisala WS425 User Manual
Page 31
Chapter 3 _______________________________________________________________ Installation
VAISALA _______________________________________________________________________ 31
Connections
WS425 has a 16-pin circular plastic connector (male) at the bottom of the
sensor. A cable connector of type AMP206037-1 can be used to attach
wires to the sensor pins.
CAUTION
When WS425 is installed upside down, always make sure the connector
is protected from rain and snow.
Table 8 below illustrates usage of the pins with different protocols.
Table 8
WS425 Sensor Pins
NOTE
The short-circuits between pins 5, 6, and 7 are required for selecting the
protocol.
Sensor
Pin No.
Protocol
RS-232
RS-422
RS-485
Analog
SDI-12
1
GND
GND
GND
GND
GND
2
GND
GND
GND
GND
GND
3
GND
GND
GND
GND
GND
4
-
-
-
-
5
-
-
6
-
7
GND
8
GND
GND
GND
GND
GND
9
Data out (TxD)
Data out (T-)
RT-
-
-
10
Data in (RxD)
Data in (R-)
RT-
-
SDI data
11
+12 VDC
+12 VDC
+12 VDC
+12 VDC
+12 VDC
12
-
Data out (T+)
RT+
WD Vref in
-
13
-
-
-
WD Vout
-
14
-
Data in (R+)
RT+
WS Fout
-
15
-
-
-
WS Vout
-
16
+36 VDC
+36 VDC
+36 VDC
+36 VDC
+36 VDC