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pnp npn wiring

1 article tagged “pnp npn wiring”.

Flat vector diagram showing PNP and NPN proximity sensor wiring connections to a PLC input module with labeled wire colors and current flow arrows
proximity sensor wiringplc sensorspnp npn wiring

Proximity Sensor Wiring to a PLC: Full Guide

Learn how to wire 2-wire, 3-wire and 4-wire proximity sensors to a PLC input. Covers PNP and NPN types, color codes, sinking vs sourcing inputs, and common wiring mistakes.

Aug 5, 2026 · 9 min read

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