The output is 1 if the input is 0. The NOT block inverts the input status.
Advantage of the NOT, for example: IDEC SmartRelay no longer requires normally closed contacts. You simply use a normally open contact and convert it into a normally closed contact with the help of the NOT function.
NOT function logic table
Input 1 |
Output |
0 |
1 |
1 |
0 |