The issue of unstable voltage at the terminals on the card

2016-05-18View Original

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I have a question regarding an S7-300. For the AI card, the voltage at 7 out of the 8 measurement points is normal, at 23V. Only one voltage point fluctuates between 17V and 22V. The same issue persists even after replacing it with a new card assembly; I’m not sure what the reason is

Reply #22016-05-18

The supply voltage for this channel is abnormal....

Reply #32016-05-18

The same problem occurred after replacing two new card assemblies in a row

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The issue of unstable voltage at the terminals on the card

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