4-channel Transmitter 7470 with Serial Data RS-485/232 Input
The Nokeval 7470 transmitter is a serial-bus-controlled analogue 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 an 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 analogue 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.
Configuration is simple by MekuWin program or the general purpose hand held programmer 6790. The transmitter uses the simple Nokeval SCL protocol. One serial data bus accepts 31 7470 transmitters or other serial instruments, that is 124 output channels. Typical applications are PC-based programs or PLC.
For more information about signal conditioners, read our in-depth guide.
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