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4/30/2009 10:01 PM | |
Joined: 12/22/2006 Last visit: 1/25/2022 Posts: 1742 Rating: (309) |
Hello, In this manual: http://support.automation.siemens.com/WW/view/en/26250840 on page 170 and 171, you can see the pin assignment. In my opinion, the Y-II connector allows to have two leads for power supply. And a failsafe module deivers two sensor supplies, one for each sensor (see p 368). To be able to detect cross-connections (short-circuits) between channels. I believe that this is the reason. |
Best regards |
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