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Is there any 2 wire system works with 0-20 ma?

Created by: Shafaei at: 9/27/2010 12:15 PM (3 Replies)

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9/27/2010 12:15 PM	Rate (0)
Shafaei Posts: 2 Rating: (0)	Dear all Isthere any type of 2 wire systems works with 0-20 ma? If yes,please describe how work it; and If the answer isnegative,Why? Best Regards Shafaei
Shafaei Posts: 2 Rating: (0)
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9/27/2010 1:35 PM	Rate (0)
UMENCHO Diamond Member Joined: 3/21/2006 Last visit: 11/1/2024 Posts: 10229 Rating: (1181)	Hello Shafaei, Did you mean AI card which could read 0-20mA?

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9/28/2010 8:00 AM	Rate (0)
Shafaei Posts: 2 Rating: (0)	Dear UMENCHO You know for Analog current loop we can use transmeter with independent(sparate) power supply(4 wire) OR integrated power supplywith signal(2 wire). In other hand current loop have 2 range:1) 4-20 mA 2) 0-20 mA Now, my question is about "2 wire" transmeters. I couldn't find 2 wire transmeterwith 0-20 mA range. If youfind it, please describe how work it; and if it's imposible, please say Why? thanks
Shafaei Posts: 2 Rating: (0)
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9/28/2010 8:55 AM	Rate (0)
UMENCHO Diamond Member Joined: 3/21/2006 Last visit: 11/1/2024 Posts: 10229 Rating: (1181)	Look at this thread - Why 2 wire system has a current of only 4-20 ma? Best regards, Hristo Mihalev

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