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EM235

1/16/2014 6:26 AM	Rate (0)
ashishm Bronze Member Joined: 2/1/2011 Last visit: 9/13/2023 Posts: 186 Rating: (4)	Dear Sir, In EM 235 with L+ and M there is third terminal for ground. When I provide earthing on that terminal my analog values start fluctuating but when I remove it than it become stable. So kindly provide me the clear Idea regarding use of that terminal and wether we have to provide earthing at that terminal or not?

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1/16/2014 9:18 AM	Rate (0)
Marcjan Platinum Expert Joined: 4/22/2010 Last visit: 3/31/2025 Posts: 5697 Rating: (716)	Hello, If you have separate powersupply for i.e. analog sensors and your CPU/EM 253, you can create a groundloop by connecting the earth terminal, if your signals are stable without this earth connected, there is no problem to not connect it. Better is to use one powersupply for both CPU/EM and the sensors in the field. Make sure that the cable shield is connected to ground atleast at 1 end off the cable. Connecting both sides can cause the same trouble. Regards
	Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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4/22/2018 11:57 PM	Rate (0)
youcef2018 Posts: 1 Rating: (0)	hi sir i'm looking for the EM 235 PLC CARD; have you an idea about the price?
youcef2018 Posts: 1 Rating: (0)
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4/23/2018 7:25 AM	Rate (0)
Duris_I Diamond Expert Joined: 4/28/2015 Last visit: 4/19/2025 Posts: 10876 Rating: (837)	Hello, I think you can check Ebay for that...
	With best regards... Ivan Duris Flight: OMICO
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