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Reading 4-20mA HART to normal ANALOG INPUT module

Created by: RIAN Che at: 6/2/2014 11:57 AM (9 Replies)

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6/2/2014 11:57 AM	Rate (0)
RIAN Che Bronze Member Joined: 1/2/2014 Last visit: 11/10/2024 Posts: 148 Rating: (22)	Hello Experts, We have a new project andfirst the customer informed all signals are 4-20mA signal from the flow/level/pressure transmitter. Now he says it is 4-20mA HART. I searched in Internet and it seems it can be connected to normal Input port. We already ordered the modules and Can we able to connect these 4-20mA hart signals to normal Analog Input modules. [6ES7331-7KF02-0AB0]. And use like 4-20 m A input? I am aware about HART enabled modules but can we forward with normal modules? They are least interested in tranmittors data avaialbe through HART. Please I need opinions from Experts. Thank You

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6/2/2014 12:10 PM	Rate (5)
Ammy Platinum Member Joined: 4/19/2008 Last visit: 11/21/2024 Posts: 1525 Rating: (159)	RIAN Che Hello Experts, We have a new project andfirst the customer informed all signals are 4-20mA signal from the flow/level/pressure transmitter. Now he says it is 4-20mA HART. I searched in Internet and it seems it can be connected to normal Input port. We already ordered the modules and Can we able to connect these 4-20mA hart signals to normal Analog Input modules. [6ES7331-7KF02-0AB0]. And use like 4-20 m A input? I am aware about HART enabled modules but can we forward with normal modules? They are least interested in tranmittors data avaialbe through HART. Please I need opinions from Experts. Thank You Hello RIAN Che, You can Conenct the Hard Device to the Normal Analog Input Module (6ES7-7KF02-0AB0) For the Parameter the Hard Device you have to Used Hard Progaming Device, That you have to connect to the Terminal of the Panel or the Direct to the Instrument, HART – Learning More about HART If you want to used the HART Configuration should be done from Your ES then you need the PDM with 6ES7331-7TF01-0AB0SM331, 8AI, 0/4-20MA HART
	Ammy New for every one.............. “No duty is more urgent than that of returning thanks.” If Problem Solved......! I can't help you privately - please post in the Forums
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6/2/2014 12:19 PM	Rate (0)
VVago Posts: 784 Rating: (52)	RIAN Che Hello Experts, We have a new project andfirst the customer informed all signals are 4-20mA signal from the flow/level/pressure transmitter. Now he says it is 4-20mA HART. I searched in Internet and it seems it can be connected to normal Input port. We already ordered the modules and Can we able to connect these 4-20mA hart signals to normal Analog Input modules. [6ES7331-7KF02-0AB0]. And use like 4-20 m A input? I am aware about HART enabled modules but can we forward with normal modules? They are least interested in tranmittors data avaialbe through HART. Please I need opinions from Experts. Thank You Hello, TX+.....................+24VDC TX- ......................+AI -AI........................-24VDC Best regards........
VVago Posts: 784 Rating: (52)	Last edited by: Wago at: 6/2/2014 5:54 PM Last edited by: Wago at: 6/2/2014 12:20 PM
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6/2/2014 12:40 PM	Rate (0)
Marcjan Platinum Expert Joined: 4/22/2010 Last visit: 12/13/2024 Posts: 5697 Rating: (715)	Hello, No need for that the 6ES7331-7KF02-0AB0 can handle 2-wire sensors. Regards, Marcjan
	Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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This contribution was helpful to 1 thankful Users Amit_86

6/2/2014 1:20 PM	Rate (0)
Blue Moderator Platinum Member Joined: 4/21/2006 Last visit: 12/20/2024 Posts: 510 Rating: (24)	New question was splitted to a new thread: HART signals => different HART cards?

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6/2/2014 1:21 PM	Rate (0)
VVago Posts: 784 Rating: (52)	Marcjan Hello, No need for that the 6ES7331-7KF02-0AB0 can handle 2-wire sensors. Regards, Marcjan No need to connect power to transmitter Kindly explain in details?
VVago Posts: 784 Rating: (52)
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6/2/2014 5:29 PM	Rate (0)
Marcjan Platinum Expert Joined: 4/22/2010 Last visit: 12/13/2024 Posts: 5697 Rating: (715)	Wago Marcjan Hello, No need for that the 6ES7331-7KF02-0AB0 can handle 2-wire sensors. Regards, Marcjan No need to connect power to transmitter Kindly explain in details? Hello your schematic is to connect a 2 wire sensor to an analog input that can't power the 4-20 mA loop. This card can. Regards, Marcjan
	Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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6/2/2014 5:45 PM	Rate (0)
VVago Posts: 784 Rating: (52)	Marcjan Wago Marcjan Hello, No need for that the 6ES7331-7KF02-0AB0 can handle 2-wire sensors. Regards, Marcjan No need to connect power to transmitter Kindly explain in details? Hello your schematic is to connect a 2 wire sensor to an analog input that can't power the 4-20 mA loop. This card can. Regards, Marcjan Sorry,Marcjan I have already checked the manual and found that carddoesn't need series loop with power
VVago Posts: 784 Rating: (52)	Last edited by: Wago at: 6/2/2014 5:47 PM
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6/3/2014 3:43 AM	Rate (1)
RIAN Che Bronze Member Joined: 1/2/2014 Last visit: 11/10/2024 Posts: 148 Rating: (22)	Thank You experts!!! So from the discission I am concluding - HART signals can be read with normal analog input port[7KF02 in my case]. Also the support page says https://support.automation.siemens.com/WW/llisapi.dll?func=cslib.csinfo&lang=en&objid=19141245&caller=view "The S7 analog input modules can be used in configurations with HART signals. If you do not need any HART properties for your HART measuring transducers, then you must simply make sure that there is adequate interference frequency suppression on the analog input module. You achieve this by setting as much integration time as possible (at least 16 2/3 ms) for your analog input module." Can any one explain the last term 16 2/3 ms? How can I set for 7KF02 module? IS that required?

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6/3/2014 11:48 AM	Rate (0)
olloy Silver Member Joined: 8/27/2010 Last visit: 4/13/2024 Posts: 417 Rating: (37)	Please look atthis manual, page 378 And make a search for "intergation time" for detailed description: STEP 7 parameter for analog input modules. The integration time is equivalent to the inverse value of the → noise suppression frequency in ms. The measured value resolution is directly proportional to the selected integration time, that is, the measured value resolution increases in proportion to length of the integration time at the analog input channel. //2.5 ms; 16.6 ms; 20 ms; 100 ms corresponds to interference frequency suppression from 400 Hz; 60 Hz; 50 Hz; 10 Hz Please check this manualtoo.
	Last edited by: olloy at: 6/3/2014 11:59 AM BTW, default setting is 50 Hz that means 20 ms of intergation time. Leave it "as is" and connect your sensor finally) Last edited by: olloy at: 6/3/2014 11:54 AM links added Last edited by: olloy at: 6/3/2014 11:51 AM
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