WindSonic Doc No 1405 PS 0019 Issue 28 November 2019
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9.7 Analogue Outputs and Options
Notes: Analogue outputs are only available from WindSonic Option 3.
Analogue Wind Speed output is in Metres/Second only.
9.7.1 Voltage or Current output
The WindSonic (Option 3) can be configured for either Voltage (0 – 5 V) or Current (0 –
20mA and 4 – 20 mA) outputs.
Important:
1. When using the current outputs, the load resistance between the Analogue outputs (Pins
8 & 9) and Signal Ground (Pin 1) must be <= 300 ohms, including cable resistance.
This is to ensure that the voltage levels on Pins 8 & 9 do not exceed 5V.
2. The current outputs must be returned to Signal Ground (Pin 1).
9.7.2 Analogue Output Modes
NMEA Mode
Modes 5,14,15
&16
Channel 1
(Pin 8 wrt Pin 1)
Channel 2
(Pin 9 wrt Pin 1)
9.7.3 Polar mode direction wraparound
The Wind Direction in Polar mode can be configured for either Standard (0 - 359) or
Wraparound (0 - 539) options. If the Standard mode is used with a chart recorder, large
swings of the recorder pen will be experienced each time the wind direction passes between
0 and 359. Using the Wraparound mode, when the wind first changes from 0 to 359, there
will be a step change on the output, but after this first time the output will change smoothly
each time the wind passes through 360. (Similarly, the first time the wind veers from 539
to 180; there will be a step change, after which the output will change smoothly).
Voltage Output
(0v to 5V)
Current Output
(0mA to 20mA)
Current Output
(4mA to 20mA)
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