6/4/2009 12:52 PM | |
Posts: 139 Rating: (25) |
Actually you can get Siplus upto 20A http://support.automation.siemens.com/WW/view/en/29277158 But since you have already bought the power supplies, I dont see any problem in using the supplies for different sensors. In fact it is quite common to see mixed supplies across the same card. What you seeon many sites is thatan estop will kill one power supply that suppliesthe contactor coils to one section of the plantwhile another section of the plant continues to run.All you have to keep in mind that your individual cards have IO groupings. for instance the 32 ch standard digital input card consists of two groups of 16. So the first 16 inputs can have a different supply and 0v reference from the end 16 inputs. So the key is to: 1. Find out the groupings in each card. (could be 4 groups of 8 etc) 2. Stick to the groups and dont cross supplies So you might be tempted to have functional group supplies instead of just all inputs on one and outputs on th other |
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