What is OR Gate?

Definition

A digital logic element whose output is true when any one or more of its inputs are true. OR gates are used in PLC programming for alternative start conditions, multi-source alarm detection, and permit logic.

Related Terms

AND Gate

A digital logic element whose output is true only when all inputs are true simul...

Logic Gate

A digital circuit element that performs a Boolean operation (AND, OR, NOT, XOR) ...

Boolean Logic

A form of algebra using TRUE/FALSE values and operators (AND, OR, NOT) to make l...

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