All Questions
12
questions
0
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answers
31
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XTR111 4-20mA/0-10V before mux stage
I am currently designing a PLC-like module based on a STM32 microcontroller. I want to have up to 8 analog outputs generating 0-10V or 4-20mA signal. I am heavily relying on this design by TI: https://...
1
vote
2
answers
148
views
Twisted pair wiring 4-20 mA sensor
I have a pressure sensor with 24 V, GND and 4-20 mA signal output pins. It will communicate with a PLC. I will only use 3m of wire max. for each pin. The installation will be on the rooftop maybe a ...
- 15
0
votes
3
answers
123
views
DIN rail terminal block resistor
Is there a reliable solution for placing my own through hole resistor into a DIN rail mountable terminal block? Or is there any off the shelf solution the use a resistor to convert my 4-20mA current ...
- 15
0
votes
3
answers
215
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4-20mA analog output into a digital input?
I'm measuring the 0-10V pressure output of a pressure sensor with a LOGO! smart relay (PLC). I would like to make sure that the pressure sensor is working even when I'm measuring nearly zero values ...
- 15
0
votes
3
answers
290
views
Reading 4-20 mA industrial pressure sensor
I am trying to read an industrial pressure sensor (datasheet) with range 0-10 bar and output 4-20 mA, with an Arduino Opta RS485, powered from an external 12 VDC source.
Leaving the sensor in the air,...
- 113
1
vote
1
answer
53
views
How to drive 0-85mA proportional solenoid valve with WAGO PLC 4-20mA or 0-10V?
I am looking to use an SMC PVQ valve. I need to drive it using a WAGO PLC. Common modules for the WAGO PLC are 4-20mA and 0-10V. How can I do it using these or any other module/method?
Very little ...
- 113
2
votes
2
answers
1k
views
Using an optocoupler to separate a 4-20 mA loop
I have a PLC that is powered with 3.3 V and a sensor powered with 12 V that outputs a 4-20 mA signal. In order to allow the signal to be readable by my PLC while isolating the current in the 12 V loop ...
- 53
-1
votes
3
answers
1k
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How to operate a relay (24 VDC 8 mA) from a 4-20mA signal?
I have a PLC that can output a 24 VDC, 4-20 mA signal, but it cannot be turned off - the lowest it can go is 4 mA. I found a relay (J104D2C24VDC.20S, 24VDC, 0.20W) that per the datasheet operates at ...
- 21
0
votes
1
answer
176
views
Transmitter / receiver connection order in current loop (4-20mA)
Is the order of transmitter and receiver connection in the current loop important? I have +24VDC power supply unit, PLC with current analog input and the sensor (for test case it's just 2.35kOhm ...
- 1
0
votes
1
answer
566
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pt100 RTD transmitters not working - two in a row - am I doing something wrong?
I just tried to use two different ones of these RTD transmitters with a pt100 probe (3 wire) with no success.
I am connecting the transmitter directly to a 4-20mA input on a PLC, as shown in the ...
- 2,696
0
votes
1
answer
179
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4-20mA PLC analog output ground referencing for other devices
I'm currently using a PLC to control an induction heating coil.
I'm using a chinese induction driver that allows 4-20mA PID input. This device runs off standard australian 230v AC 50hz.
I've ...
1
vote
3
answers
322
views
ADC input software multiplexed between current/voltage input
Problem
I need to design an isolated analog front end to a Raspberry Pi which needs to work with either a 4-20mA or 0-10V transmitter. I've been studying existing analog input modules from major PLC ...
- 111