PLC: Sensors and I/O Series--Digital Sensor--DC Type: Sinking

Part 4 of the Sensors and I/O Series describes how to utilize a dc type sensor to relay or light items

  • Show flip chart with DC sensor to relay or light or other items

  • Most come in SS output

  • Explain Sinking on flip chart

  • Nothing about performance about polarity

  • Most of United States use sinking

  • Also called NPN or current sinking and sometimes open collector

  • Explain leakage current

  • Wire relay with it and show it work

  • Different types of cords, quick disconnect, plastic, stainless, NEMA 4X For wash down

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