1/14/2012 4:07 PM | |
Joined: 4/22/2010 Last visit: 5/3/2024 Posts: 5697 Rating: (715) |
Hello, 1) The first CPU is a DC 24V version, the 2nd on a 110to 240 VAC version. The 1st needs a separate power supply (24VDC), the 2nd you can connect to the main power directly, it has a 24VDC powersupply for powering sensors. The first one has transistor outputs, the 2nd Relais outputs. 2) the onboard analog inputs are 0-10V inputs, if your sensors have 0-10V outputs you can use it. If the sensors have 4-20 mA outputyou need the EM module or signal converters. More you can read in the system manual : http://support.automation.siemens.com/WW/view/en/1109582 Chapter: AppA technical specifications- CPU, you can find the EM information there too. Regards, Marcjan |
Problem solved? |
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1/16/2012 9:36 AM | |
Joined: 4/22/2010 Last visit: 5/3/2024 Posts: 5697 Rating: (715)
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Hello, If there is a big risk off power surge, it's better to use a separate 24V supply, it's cheaper to replace a powersupply then a complete CPU with build in supply. Even better in this case is to protect the CPU, with a proper power surge protection like I.E. http://dehn.de/TDatenblatt2PDF/pdbpdf2?familyid=57&identnr=36701&prod=yl&artnr=918402&lang=en&pub=true Regards, Marcjan |
Last edited by: Marcjan at: 1/16/2012 9:40 AMLast edited by: Marcjan at: 1/16/2012 9:38 AMProblem solved? |
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