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s7-1200 analog problem

10/21/2013 1:03 PM	Rate (0)
ar111 Posts: 4 Rating: (0)	I have a CPU CPU 1214C DC/DC/Rly (6ES7 214-1HE30-0XB0) and a signal module CM1234 (6ES7 234-4HE30-0XB0) and I should connect a sensor to analog input. Sensors wiring diagram is attached. I have to get the Co2 and TE values to analog input. Should the sensors ground be connected to both AI's (-) pin and then just connect the output values to their own channels? According to manual unused channels should be shorted. But what pins should be connected and where? Attachment anturi.JPG (265 Downloads)
ar111 Posts: 4 Rating: (0)	Last edited by: ar111 at: 10/21/2013 1:07 PM
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10/21/2013 5:05 PM	Rate (0)
0_Einstein Diamond Expert Joined: 7/7/2010 Last visit: 3/19/2025 Posts: 15730 Rating: (2488)	ar111 I have a CPU CPU 1214C DC/DC/Rly (6ES7 214-1HE30-0XB0) and a signal module CM1234 (6ES7 234-4HE30-0XB0) and I should connect a sensor to analog input. Sensors wiring diagram is attached. I have to get the Co2 and TE values to analog input. Should the sensors ground be connected to both AI's (-) pin and then just connect the output values to their own channels? According to manual unused channels should be shorted. But what pins should be connected and where? To answer your question above, yes. Make sure your GND terminal on your sensor module is the same as your signal GND and your input module 0m/1m terminals.
	science guy
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10/22/2013 7:09 AM	Rate (0)
ar111 Posts: 4 Rating: (0)	I have a external power supply which gives power and ground to plc and field components. So they all will have the same GND. But I'm still unsure about shorting the unused AI channels. Which pins I should connect and where? I should be quite sure about the connections when I go to the site, because I have only limited time to make all the remaining connections. There is no time for testing.
ar111 Posts: 4 Rating: (0)	Last edited by: ar111 at: 10/22/2013 7:11 AM
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10/22/2013 7:57 AM	Rate (0)
Marcjan Platinum Member Joined: 4/22/2010 Last visit: 2/26/2025 Posts: 5697 Rating: (716)	Hello, You can just put a bridge between X+ and X- (where X is channel number) To connect your sensor see: How do you connect a sensor to the analog signal modules of SIMATIC S7-1200? You need to connect as in the 4-wire current example. 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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10/22/2013 8:41 AM	Rate (0)
ar111 Posts: 4 Rating: (0)	Thanks The sensors were connected by the previous engineer and I didn't have the time to start testing new connecting methods.
ar111 Posts: 4 Rating: (0)
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10/28/2013 6:56 AM	Rate (0)
ar111 Posts: 4 Rating: (0)	Got everythin working. Thanks for helping me.
ar111 Posts: 4 Rating: (0)
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This contribution was helpful to 1 thankful Users Marcjan

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