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MODEL 81000 SERIES SENSORS
WIRING DIAGRAMS APPENDIX A
APPENDIX A: WIRING CONNECTIONS
MODEL 81000V
Model 81000V
Model 81000
Ultrasonic Anemometer
Ultrasonic Anemometer
W6 Shorting Blocks
RS-485 Half Duplex
Position "C"
A
B
C
W6
W5
A1
B1
V1
V2
V3
+PWR
PWR
EARTH
TX
GND
REF
A2
YOUNG
81052 REV B
R. M. YOUNG COMPANY 2801 Aero Park Drive , Traverse City, Michigan 49686 USA
Set BAUD RATE then select option for RS-485 HALF DUPLEX.
Use any SERIAL OUTPUT FORMAT (see manual section 6.7).
Other parameters settings may apply.
RS-485 Half Duplex signals may be bussed. See manual (Section 7.0)
for timing constraints on Half Duplex systems.
1 start, 8 data, no parity, 1 stop bit, no flow control
Verfiy shorting block jumpers at W5 and W6 as shown in drawing.
If RS-485 connections are bussed, install W5 shorting block in last
sensor on bus only!
Use shielded cable. Connect cable shield to ground at one end only as
shown. For maximum reliablity, connect sensor Earth Ground as close
to sensor as possible.
W5 Shorting Block
100 Ohm Termination
(If Bussed - last sensor only)
V4
VREF
RX
SERIAL
B2
REF
TEL (231) 946-3980
DWG: W81XXX-90(RS-485 HALF-DUPLEX)(A)
RS-485 Half-Duplex Connections
FAX (231) 946-4772
Page 9
REV: A031320
CHK:
DRW: JMT
DATE: 03/18/20
RX (A1 non-inverted)
TX (B1 inverted)
Serial Reference
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Sensor power
( )
12-24 VDC 150mA max
( )
81000V-90(L)
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