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Old August 24th, 2021, 01:27 AM   #1
mikas_m
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signal converter v->mA recommendation

Hello guys,

can you please recommend a robust and reliable signal converter 0-5V (or 1-5V) to 4-20 mA?
I need to measure voltages between mainly between 1 and 3V (2.5V 90% of the time) with high accuracy (0.1% or better).
I have found many brand name signal converters (Siemens, Weidmuller,...) but they are 0-10V/4-20mA, so I worry about the accuracy.

Thank you!
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Old August 24th, 2021, 02:22 AM   #2
ojz0r
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I've often used (with good result) PR electronics from Denmark.
They have this converter with multiple options for input and output in the same device: https://www.prelectronics.com/produc...onverter-3114/
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Old August 24th, 2021, 06:19 AM   #3
mikas_m
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Actually, I have found this 1SVR 040 000 R1700, but it is too expensive and it has many options (universal), which I really don't need.
This PR electronic could be what I need at a reasonable price.
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Old August 24th, 2021, 07:15 AM   #4
PLC Pie Guy
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Load Cell central.

OM-19 Signal Conditioner

I use this for everything!

Thanks
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Old August 24th, 2021, 07:51 AM   #5
mylespetro
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Acromag TT237:

Multi-range 1V, 5V or 10V input
4-20mA output (sink/source)
12-32 V loop power

I've used their TT239 frequency to mA converters and they're super easy to use. Need to be set up with a computer though, and you'll need a Mini (not Micro) USB cable. $235.75 USD list price.
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Old August 24th, 2021, 08:14 AM   #6
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https://cdn.automationdirect.com/sta...nditioners.pdf
I like the FC-33 unit for conversion and isolation.
Regards,
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Old August 24th, 2021, 12:42 PM   #7
Lare
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What is wanted price range?


Phoenix have 0..5V to 4..20mA models.



https://www.phoenixcontact.com/onlin...=ALL#Inputdata
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Old August 24th, 2021, 01:21 PM   #8
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Old August 24th, 2021, 02:38 PM   #9
Levi G
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You have mentioned Weidmuller, I have used these https://catalog.weidmueller.com/cata...tID=1481970000 from Weidmuller before. It says accuracy is < 0.05 % of measuring range.
These are not just 0-10v/4-20mA.
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Old August 24th, 2021, 06:28 PM   #10
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+1 for PR Electronic. I've used PR Electronics units extensively - never for this specific application, but their whole schtick is "convert from anything, to anything" and I've never had any complaints with them. Simple, reliable, easy to set up.
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Old August 25th, 2021, 06:50 AM   #11
mikas_m
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Thank you guys for your suggestions.
I'll probably try PR electronics.
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Old August 25th, 2021, 09:27 AM   #12
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Define Instruments - Javaline
http://www.defineinstruments.com/sho...al-transmitter

It can take the 0-10V in use only 0-5V as the reference range, and you can span that over the output to 4-20mA.

It also handles 4-20 isolation, thermocouple, rtd conversions.
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Old August 25th, 2021, 10:38 AM   #13
mad4x4
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PR Electronics do converters.
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Old August 25th, 2021, 03:21 PM   #14
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I have standardized on the PR Electronics 4114 universal conditioner. A lot of features for a good price, and my rep in Chicago has them in stock.



Covers any signal input, easily scaled, I bought the BlueTooth adapter and can connect, program & monitor from the phone app - plus it has logging built in.


They also have an AC input conditioner I use for monitoring the incoming AC for spikes & brownouts.


The 4114 has a sister that is identical except it has an added programmable relay output (that was handy for upgrading a SLC with 4 TTL inputs to CLX DC inputs. Just programmed the relay to come on over 3 VDC and tell a regular DC input it's on.)
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Old August 25th, 2021, 06:51 PM   #15
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Pencil

Quote:
Originally Posted by ASF View Post
+1 for PR Electronic. I've used PR Electronics units extensively - never for this specific application, but their whole schtick is "convert from anything, to anything" and I've never had any complaints with them. Simple, reliable, easy to set up.
+2. They're great and reliable
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