Hi everybody,
Its my first time here and i hope i do not bother you.
I am not expired in electronics but i have to realise an application with the VM 140.
There are 2 questions for my startup.
1)
I want to connect a DS 1820 Temp Sensor.
The sensor needs 5V.
Can i get 5V from the VM 140 Board ?
2)
How to connect a counter with a 4-20 mA output.
Rgds
Rudolf
[quote]I want to connect a DS 1820 Temp Sensor. [/quote]I’m sorry to say, but this kind of digital sensor is not possible to use with the VM140. The data rate of the sensor output is too high.
[quote]How to connect a counter with a 4-20 mA output.[/quote]Put a resistor in parallel to the analog input of the VM140. Feed the output current through this resistor.
Using 200 ohm resistor you get 0.8V-4V to the VM140 input. This is proper value when you use the 0-5V analog input range.