Nokeval 7470 Serial to Analog Converter

The Nokeval 7470 is a serial-bus controlled analog output unit. It provides four mA or V outputs, that can be controlled via an RS232 or RS485 bus. As a slave, it supports Nokeval SCL, Modbus RTU, and Ascii protocols. Alternatively, it can function as a SCL Master querying other devices.

Analog output ranges include 0…20mA, 4…20mA, 0…5V, and 0…10V. The Nokeval 7470 needs 24 VDC supply voltage. The analog outputs are not galvanically isolated from the power supply or each other. They share the common negative wire. However the serial bus is galvanically isolated.

The 7470 is suitable for Vaisala weather station WXT520, WMT52 and WS425.


4 output channels 0..20mA 4..20mA 0..5V and 0..10V
Serial data input RS-232 and RS-485
Simple Nokeval SCL protocol
Configuration with a hand held programmer 6790 or by MekuWin program via serial bus
DIN-rail mounting (35mm)
Power supply 18..28 VDC

Input Details

Inputs: RS485, RS232
Bus Protocol: Nokeval SCL, ASCII, Modbus RTU, Hart
Baud Rates: 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600 and 11520

Output Details

Output Channels: 4
Outputs: mA, V

Power Supply

Current Consumption: 30…120mA
Supply Voltage: 24VDC- 18…28VDC

General Information

Weight: 125 g
Protection Class: IP20
Installation: 35mm DIN rail
Minimum Ambient Temperature: 0°C
Case Material: plastic
Maximum Ambient Temperature: 55°C

Please call 01628 778688 for more information.