In PLR, two inputs connected in parallel perform which Boolean operation?

In PLR, two inputs connected in parallel perform which Boolean operation?

• A. Not
• B. And
• C. Or
• D. Nor

Answer: (C)

In PLR, wiring two inputs in parallel means the output will energize if either input is active. This is because parallel paths provide multiple routes for the current to energize the output, so the logic behaves like an OR operation: if one input or the other (or both) is true, the result is true. For example, two switches in parallel can both control a light; turning on any one switch will illuminate the light. This contrasts with placing inputs in series, which requires both to be true to energize the output (an AND behavior). Not and Nor involve inversion, not parallel wiring.

In PLR, wiring two inputs in parallel means the output will energize if either input is active. This is because parallel paths provide multiple routes for the current to energize the output, so the logic behaves like an OR operation: if one input or the other (or both) is true, the result is true. For example, two switches in parallel can both control a light; turning on any one switch will illuminate the light. This contrasts with placing inputs in series, which requires both to be true to energize the output (an AND behavior). Not and Nor involve inversion, not parallel wiring.