Normally open contact symbol
Also called NO contact, XIC, Examine if closed
Passes power along the rung when its bit is 1 (true). In Allen-Bradley PLCs it is the XIC instruction, examine if closed.
IEC 61131-3What the normally open contact symbol means
Passes power along the rung when its bit is 1 (true). In Allen-Bradley PLCs it is the XIC instruction, examine if closed.
How it is drawn
Where you see it
Reading inputs (a start button, a limit switch), internal flags and the state of outputs, as conditions of a rung.
Related symbols
Frequently asked questions
What does the normally open contact symbol look like?
Two vertical lines across the rung.
Where is a normally open contact used?
Reading inputs (a start button, a limit switch), internal flags and the state of outputs, as conditions of a rung.
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