WindMaster and WindMaster Pro
1561-PS-0001.
Issue 11 February 2017
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22
6.7.
Connection to a PC using RS 232
Notes:-
1.
Using RS232, the cable length for reliable operation is limited to 6.5m (20ft) @ 9600 Baud.
See 6.4
2.
For longer cable runs, we recommend using the WindMaster configured with RS422 output, and a RS422/232
converter at the PC.
3.
Ensure WindMaster is configured for AUTO or RS232.
See Section 10 Configuring.
4.
On Pipe Mount box units set J4 Link to COM/CM and externally link Comms mode to Power V+ or internally
move J4 link from COM/CM to between COM and V+.
5.
On non-pipe mount box units if Pin 4 is left open circuit the unit will default to RS422 operation in Auto
mode.
WindMaster connector
Typical Serial connector
(9 Way ‘D’)
Signal names
Pipe Mount
Box
31 Way
Pin nos.
Cable
2 twisted pairs
Signal names
Pin nos.
TXA (-)
RXA (-)
J2, TXA (-)
J2, RXA (-)
1
6
RXD
TXD
2
3
Signal comms
Ground
5
Comms Mode
-
link to Power V+
J4, Move
Link to
between
COM to V+
4
Cable Screen
(Use the most
convenient pin)
Screen
Ground
3, 7, 21, 30
or 31
Screen and
Drain wires
Chassis ground
N/A
Power +ve
J1, PWR V+
11
+ DC Power
Power 0v
J1, PWR 0v
12
- Supply, 9-30v
6.8.
Connection to a PC using RS 422
Notes:-
1.
The PC must be fitted with an internal or external RS422 to RS232/USB converter.
2.
On Pipe Mount box units set J4 Link to COM/CM and externally link Comms mode to Power 0v or internally
move J4 link from COM/CM to between COM and 0v.
3.
Configure WindMaster for RS 422 by linking Comms Mode line (Pin 4) to 0V (Pin 12).
4.
On non-pipe mount box units if Pin 4 is left open circuit the unit will default to RS422 operation in Auto mode.
WindMaster connector
PC with RS422 to RS
232/USB converter
Signal names
Pipe Mount Box
31 way
Pin nos.
Cable –twisted
pairs
Signal names
TXB(+)
TXA(–)
J2, TXB(+)
J2, TXA(-)
2
1
RXB(+)
RXA(–)
RXB(+)
RXA(-)
J2, RXB(+)
J2 RXA(-)
5
6
TXB(+)
TXA(–)
Signal Ground
Screen (Use the
most convenient
pin)
Screen Ground
3, 7, 21,
30 or 31
Screen and
drain wires
Chassis ground
Comms Mode
- link to Power 0V)
J4, Move link to
between COM to 0V
4
Power +ve
J1, PWR V+
11
+ DC Power
Power 0v
J1, PWR 0v
12
- Supply, 9-30v