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Old July 1st, 2013, 03:15 AM   #1

Tresancos is offline
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Extreme temperature conditions


I have a project where the PLC works in extreme atmospheres, such as -30C . Before install it the PLC has to been tested in a climate chamber at -40C. I can't find companies that supplies PLC to this conditions.

Which PLCs could be installed in such conditions?

Thanks for the answer

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Old July 1st, 2013, 05:12 AM   #2

shooter is offline
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find companies with a marine approval like DNV, LLoyds, GL etc.
i use WAGO PLC (with Codesys) they do have approval, these low temps are not the biggest problem, the higher ones are.
operation is from -20 to +60
extended range is possible, however there will always be some heat by the PLC, so a little heating in an insulated box should be possible.
The biggest problem with low temps are the capacitors mounted, the rest is no big issue.
Another possibility is to make yourself a small board wit a mega328 very simple no external parts needed. see arduino for examples)
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Old July 1st, 2013, 07:03 AM   #3
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BryanG is offline
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Siemens have extended temperature range versions of their PLCs under the name of SIPLUS. The info certainly seems to say that -40C is do-able.
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Old July 2nd, 2013, 04:04 AM   #4

GeoffC is offline
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Have a look at the Twido Extreme from Schneider$File/35013462_k01_000_05.pdf

from the manual
Environment Characteristics

The operating environmental characteristics are as follows:
Characteristic Description
Operating temperature range -40C to +110C (-40F to +230F)
Geoff C

Last edited by GeoffC; July 2nd, 2013 at 04:08 AM.
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Old July 19th, 2013, 02:16 PM   #5

Karsten is offline
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Old July 20th, 2013, 12:12 AM   #6

seppoalanen is offline
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-30 is normal tempereture here in winter time. Therefore we are heating houses, as well PLC-Cubicles. Inside The Cubicle we can use insulating material as polyurethane plate in door and walls.

Rittal have suitable heaters and thermostat that you can enable voltage for PLC etc. when temperature is enough warm inside. Remember humidity also.

Then after, you can use everything you like.
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Old July 20th, 2013, 10:28 AM   #7
Highland Controls
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The ABB AC500 XC(Extreme Conditions) PLC will meet those requirements.
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