Analog Outputs for Weather Transmitters by using serial converter 74700 pages

Nokeval

Application Bulletin WE-2

sales@nokeval.com
www.nokeval.com

Tel. +358-3-3424 800
Fax. +358-3-3422 066

Analog Outputs for Weather Transmitters
by using serial converter 7470
Four outputs
4-20 mA

The serial converter 7470 is designed to add analog outputs for
measuring instruments which have only serial output. Typical application for 7470 is the multi-input weather transmitter WXT520 sending
several weather parameters over serial bus. The 7470 is easy to
congure to give analog outputs from all measuring sensors or calculated parameters of Vaisala weather transmitter WXT520. The serial
converter 7470 can be placed up to 1 km from the
transmitter with serial bus RS485.
The 7470 has four analog output channels for serial input RS485 or
RS232. More analog outputs are available by using several 7470
converters with serial bus RS485. The converter supports Modbus
RTU, Nokeval SCL and ASCII protocols. The 7470 is easy to
congure with MekuWin congurationsoftware on the computer.

RS485 or
RS232

Power supply
24 VDC

Serial converter 7470

7470

Typical outputs:
Wind direction
Wind speed

Serial output RS485

Gust
Temperature
Power supply
24 VDC

Vaisala Weather Transmitter
WXT520 or WMT52
7470
WXT520 Weather multi-sensor
Designed for demanding applications where stable
and inexpensive wind measurements are required.
The Vaisala Weather Transmitter WXT520 is a
compact and lightweight multi-sensor instrument
that measures the most essential weather
parameters. It is a congurable product that can
measure wind speed and direction, liquid
precipitation, barometric pressure, temperature
and relative humidity — all in one transmitter.

WMT52 Ultrasonic Wind Sensor
Designed for demanding applications where stable
and inexpensive wind measurements are required.

Humidity
Barometric pressure
Rain accumulation
Rain intensity
Power supply
24 VDC

Several 7470 units can be connected
in parallel on a serial bus RS485.