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SM 1231 RTD Overvoltage protection.

8/19/2010 12:48 PM	Rate (0)
radekk Bronze Member Joined: 3/22/2010 Last visit: 11/8/2024 Posts: 76 Rating: (0)	Hi, My customerwants to use S7-1200 system, mainly SM 1231 RTD with PT100. Question is: does this module have overvoltage/spike protection or this protection should be externally provided? If so what should be used in order to do so? I cannot find this information in documentation. Thanks in advance. Radek

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8/19/2010 5:21 PM	Rate (0)
Denilson Pegaia Platinum Expert Joined: 9/23/2005 Last visit: 11/4/2024 Posts: 4351 Rating: (1452)	Hi, in principle, the PT100 is a passive element and doesn't generate, itself, voltages. So, a external protection would be not necessary. The has a isolation Field / module of 500VAC (no isolation between channels). You can fould additional information about the module in the manual: http://support.automation.siemens.com/BR/view/en/43346925
	Denilson Pegaia Siemens Industry Sector Technical Support
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8/20/2010 11:16 AM	Rate (0)
radekk Bronze Member Joined: 3/22/2010 Last visit: 11/8/2024 Posts: 76 Rating: (0)	Hello Pegaia, Thank You for Your reply. I've talked to my client, but what he meant was more like thundering protection (earth wire). Do You know if this module is protected this way? Best greets, Radek
	Last edited by: radekk at: 8/20/2010 11:46 AM
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