All Questions
6
questions
2
votes
1
answer
120
views
3 wire and 4 wire wiring configuration in PLC [closed]
I need some clarification on 3 and 4 wire connection.
In the 2/3/4 wire system, Is the PLC must to provide power to the transmitter or transmitter is powered by the external supply.?
Please clarify ...
- 159
1
vote
2
answers
629
views
How to improve ADC reading accuracy from 1mV to 0.1mV or better
I want to read a DC voltage from a battery with 0.1mV resolution or better and send the value to a PLC based in Arduino Mega. I selected an ADS1115 (datasheet here) which has enough resolution to do ...
- 407
2
votes
1
answer
247
views
How to calculate the cut-off frequency of a software average filter
I want to read the voltage of a battery using an ADC connected to a PLC. The signal oscillates a bit and I want to smooth it. The ADC samples the signal at 860 samples per second and stores it in ...
- 407
1
vote
2
answers
91
views
Testing the accuracy of a PLC current input module - economical approach?
I don’t want to suggest a particular brand or model so to discourage a good universal approach. But let’s say the DUT here would be your typical industrial PLC module, a typical 4-20mA SAR ADC based, ...
- 73
0
votes
1
answer
90
views
What do I need to do to connect an ADC IC to a Adam 6066??Is it even possible to read the inputs from the ADC chip?
I am working on a input array that uses a ADC (MCP3208 or something similar) to read in several analog inputs and convert them to Digital signals that go into an ADAM 6066 Module. What would I need to ...
- 115
4
votes
2
answers
2k
views
Isolating an analogue input using ADC/DAC
I'm looking into isolating an analogue input coming from field equipment and interfacing to a PLC analogue input module. The input will be of the 4-20mA range (1-5V).
There are a few ways to approach ...
- 63