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ansal678678
Junior
Joined: 26 Apr 2021
Posts: 6
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 Posted: 26/06/2021 11:07 Post subject: converting 4 to 20 mA to 0 to 10 V dc in s7 1200 PLC |
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Hi,
I have a E& H thermometer tip No:TR66 and S7 1200 PLC (6ES7 212-1HE40-0XB0)
E &H thermometer provides 4 to 20 Ma output.
S7 1200 plc analog input is 0 to 10 V.
So please guide whether we need to connect resistance in between Analog input in PLC? If so how much Ohms resistance and also power rating of resistor we need to connect..
Also please guide on the wiring diagram also..
2M ,0..here how to connect the TR66 E and H to PLC..
Thanks .. |
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mazytus
Junior
Joined: 05 Apr 2013
Posts: 3
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| Posted: 26/06/2021 11:39 Post subject: |
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Precision 500 Ohm
10V/0.02 mA= 500 Ohm |
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ansal678678
Junior
Joined: 26 Apr 2021
Posts: 6
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| Posted: 26/06/2021 12:05 Post subject: |
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what about Watt of the resistor ???
If we choose higher watt for safety will it blow out?? |
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keosmm
Junior
Joined: 14 Jan 2016
Posts: 15
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| Posted: 26/06/2021 13:48 Post subject: |
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| [url]https://support.industry.siemens.com/cs/document/25204813/how-through-external-switching-can-you-use-a-0-10v-analog-input-on-a-makeshift-basis-also-for-0-20ma-?dti=0&dl=en&lc=it-WW[/url] |
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kezlec
Junior
Joined: 18 Oct 2018
Posts: 1
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| Posted: 26/06/2021 18:43 Post subject: |
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10mA x 500 Ohm
P=RxIxI = 500ohm x 0.010A x 0.010A = 0.05W
P>=0.05W |
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