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13/08/2026

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PNP vs NPN Proximity Sensor Wiring:

PNP और NPN sensors industrial automation और PLC systems में सबसे commonly used DC proximity sensors हैं। दोनों का basic function target detect करना है, लेकिन output switching method अलग होता है।

🟢 PNP Sensor — Sourcing Output

Target detect होने पर PNP sensor अपने BLACK output wire पर positive voltage (+V) देता है।

Typical 3-wire connection:

🟤 Brown → +12 to 24 VDC

🔵 Blue → 0 V / GND

⚫ Black → Output to Load

➡️ Target detected → Black = +V → Load ON
➡️ Target not detected → Black = 0 V → Load OFF

🔵 NPN Sensor — Sinking Output

Target detect होने पर NPN sensor अपने BLACK output wire को 0 V/GND की तरफ switch करता है।

Typical 3-wire connection:

🟤 Brown → +12 to 24 VDC

🔵 Blue → 0 V / GND

⚫ Black → Output to Load

➡️ Target detected → Black = 0 V → Load ON
➡️ Target not detected → Black = +V → Load OFF

⚙️ सबसे आसान याद रखने का तरीका

PNP = Positive switching → Sourcing
NPN = Negative/0 V switching → Sinking

PLC input module चुनते समय sensor के PNP/NPN type और PLC input wiring compatibility को जरूर check करना चाहिए।

💡 Industrial automation में सही sensor selection केवल wiring का सवाल नहीं है—PLC input type, load arrangement और common/reference wiring भी equally important हैं।

आपके plant में PNP sensors ज्यादा use होते हैं या NPN? Comment में बताइए 👇

The CEO. Kv Circuit Solutions Limited
22/07/2026

The CEO. Kv Circuit Solutions Limited

16/02/2026

Address

Jomo Kenyatta Avenue
Mombasa
9901880107MOMBASA

Opening Hours

Monday 09:00 - 17:00
Tuesday 09:00 - 17:00
Wednesday 09:00 - 17:00
Thursday 09:00 - 17:00
Friday 09:00 - 17:00
Saturday 08:00 - 12:00

Telephone

+254101990518

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