Vaisala WAC155 User's Guide download pdf (Page 22)

User's Guide ______________________________________________________________________

20 ___________________________________________________________________M210822EN-A

0702-007

Figure 8 Wiring of the Sensors

Signal Output

The WAC155 transmitter provides a half-duplex RS-485 serial bus

connection. Wind data is provided in standard NMEA messages. In

addition, a service connection is available for configuration and status

information. The service connection is available through the same

RS-485 interface. When the service connection is in use, data

transmission and query are disabled.

Several transmitters can be connected to the same RS-485 bus. If only

a single transmitter is connected, the transmitter can be configured in

auto-transmit mode, i.e. the device transmits data messages at

configured intervals. If there are several transmitters in the same bus,

auto-transmission may not be enabled, and data must be polled using a

query.

The following numbers refer to Figure 8 on page 20.

1 = Anemometer cable

2 = Glands for power and signal cables

3 = Wind vane cable

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 59 60

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Vaisala WAC155 User's Guide Page 22