Card problem

2009-02-24View Original

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I don't quite understand what the isolation and high side in the DO card represent.

Reply #22009-02-24

Cards generally use photoelectric isolation to physically isolate internal and external circuits to prevent external circuits from causing damage to the card.； “I don't know what "high test" means.

Reply #32009-02-25

For the issue of isolation, you can refer to one of my posts http://bbs.hcbbs.com/thread-388158-1-1.html

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