Series contacts (AND) symbol
Also called AND logic, Contacts in series
Two contacts one after the other on a rung: power passes only when both are true, which is AND logic.
IEC 61131-3What the series contacts (AND) symbol means
Two contacts one after the other on a rung: power passes only when both are true, which is AND logic.
How it is drawn
Where you see it
Conditions that must all be met: a start command and no fault and the guard closed.
Related symbols
Frequently asked questions
What does the series contacts (AND) symbol look like?
Two contacts on the same line.
Where is a series contacts (AND) used?
Conditions that must all be met: a start command and no fault and the guard closed.
Every interlock in your PLC logic, tested and signed.Deskely holds the cause and effect and function test records for every system, checked as they are signed, so the logic is proved before start-up.
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