The PNP transistor provides a(n) ______ signal at its output when the sensor is energized.

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Prepare for the OCC SACA Sensor Logic Systems 1 (C-205) Exam. Study with detailed questions and insightful explanations. Get ready for your certification!

Multiple Choice

The PNP transistor provides a(n) ______ signal at its output when the sensor is energized.

Explanation:
A PNP output sources current from the supply, so when the sensor energizes the transistor, it drives the output up toward the supply voltage. In a high-side configuration, the emitter is at V+, and turning the transistor on sends current to the load, making the output High. This is the opposite of a sinking (NPN) output, which pulls the load toward ground when active. So the output becomes a High signal when energized. It wouldn’t be Low because the active path pushes the output toward the supply, and it wouldn’t be Floating or Mid since the output is actively driven to a defined high level.

A PNP output sources current from the supply, so when the sensor energizes the transistor, it drives the output up toward the supply voltage. In a high-side configuration, the emitter is at V+, and turning the transistor on sends current to the load, making the output High. This is the opposite of a sinking (NPN) output, which pulls the load toward ground when active. So the output becomes a High signal when energized. It wouldn’t be Low because the active path pushes the output toward the supply, and it wouldn’t be Floating or Mid since the output is actively driven to a defined high level.

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