Gill Instruments Ltd
Intrinsically Safe WindObserver Anemometer
Page 26
Issue 10
Doc. No. 1360-PS-0001
May 2015
Connecting to a Gill WindDisplay using an RS422 Connection
Maximum suggested RS422 approved twisted pair screened cable length is 1000 Metres.
Refer to the WindDisplay User Manual for the method of operation.
Intrinsically Safe Power Supply Box
WindDisplay
Signal
Name
Mains PSU
Terminal
Low Voltage
PSU J4
Terminal
Terminal
Number
Signal
Name
TX +
3
3
8
RS422 +
TX -
4
4
7
RS422 -
GND
5
5
Ground
Earth
The Intrinsically Safe WindObserver is designed to interface with the Gill
WindDisplay unit via the Power Supply Interface to provide a complete wind
speed and direction system. To interface to a non NMEA WindDisplay the
WindObserver is set for Polar (M2) and 9600 (B3) configuration settings.
When coupled to a WindDisplay, the Intrinsically Safe WindObserver can be used
as supplied, however if a fault occurs the WindDisplay may lock into the last
valid reading. Re-configuring the Intrinsically Safe WindObserver to Fixed Field
output (O2) will ensure that any fault is flagged on the WindDisplay.
After coupling to a WindDisplay, the Wind Speed units and the Averaging period
can be selected using the WindDisplay controls.
See the WindDisplay User
Manual
.
Note that although the WindDisplay can display wind speed in various units, these
are calculated within the WindDisplay. The data coming to the WindDisplay
must
be in metres/sec (the IS WindObserver factory default output setting).
Meteorological Display
Marine Display
NOTES:-
If the WindDisplay is configured for NMEA mode then the Intrinsically Safe
WindObserver must also be configured for NMEA mode and normally 4800
baud operation (configuration settings M5 and B2).
The WindDisplay cannot provide power for the sensor circuitry.
Cable Shield Wire
