Gill Instruments Ltd
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WindObserver 65
Page 19
Issue 4
Doc. No. 1390-PS-0039
June 2016
RS 232 Output – 9 way Skt
Pin
Designation (Example Plug MH Connectors MHDM9-DM9P-K)
1
DCD
(e.g. RS Components 765-9485)
2
RX data
3
TX data
4
DTR
5
Signal Ground
6
DSR
7
RTS
8
CTS
9
RI
RS422 Network In – 9 way Skt
Pin
Designation (Example Plug MH Connectors MHDM9-DM9P-K)
1
Not connected
(e.g. RS Components 765-9485)
2
Not connected
3
Not connected
4
RS422_RXA (-)
5
Signal ground
6
RS422_TXA (-)
7
RS422_TXB (+)
8
RS422_RXB (+)
9
Chassis
RS422 Network Out – 9 way Plg
Pin
Designation
(Example MH Connectors MHDM9-DM9S-K)
1
Not connected
(e.g. RS Components 765-9488)
2
Not connected
3
Not connected
4
RS422_RXA (-)
5
Signal ground
6
RS422_TXA (-)
7
RS422_TXB (+)
8
RS422_RXB (+)
9
Chassis
PCI Operation.
There are three Red LED’s on the PCI front panel.
When the PCI box is powered the Power LED will illuminate.
When a WindObserver is connected as above to the PCI box and is set to output
continuous data the PCI box RX LED will flash on/off at the WindObserver output rate
thus giving a good indication that the WindObserver output is wired to the PCI box
correctly and outputting RS422 data correctly.
If the PCI RS 232 connection is connected to a computer then when a terminal programme
is opened and commands sent by a PC keypad or program to the PCI box its TX LED will
illuminate intermittently indicating a good connection between the PC and PCI box.
