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Reed Switch Plc Wiring Diagram. Magnetically operated limit switches should not be subjected to. Simply put it is a magnetic switch.
Example of Connection to PLC 2-wire Indicator light Protective circuit etc. LOW cost is the number one advantage of a reed switch which would explain its wide use. Brown Blue Load AND connection for NPN output using relays Switch 1 Brown Switch 2.
A reed switch switches a current on the same way but a magnet provides the pushing pressure instead of your finger.
The two materials do not initially touch each other but when a magnetic field from either a permanent magnet or an induced one from a current-carrying coil is placed near the reed switch the switch closes and makes electrical continuity. The simplest magnetic-field sensor is a reed switch. Book that related with Reed Switch Plc Wiring Diagram book. A spring makes it pop back out again when you take your finger away.