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Discrete DC Sensors
3- wire sensor
DC circuit
photoelectric sensors
Wiring a discrete DC sensor
inductive proximity switch
discrete DC device
discrete DC input card
discrete AC device
discrete AC input card
“three-wire” discrete DC
bi-polar transistors
solid-state switches
diagram of an inductive switch
PNP sensors
NPN sensors
3-wire discrete DC sensors
schematic of Siemens SM321 digital input card
6ES7321-7BH01-0AB0
marshalling terminals
dc sensor
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