What are Switches?
Simply Put, a Switch is


Types of Switches
Broadly speaking, there are "two types" of switches.
Manual Operation Switch
A switch that is turned on or off manually. |
Detection Switch
A switch that is turned on or off by an "object" |
(Examples)
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(Examples)
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Basic Configuration of Connection (Circuit)

a contact
(Normally open contact)
N.O. (Normally Open) contact
A contact that is normally open (OFF state)
and connect a circuit (turn ON) when it operates

b contact
(Normally closed contact)
N.C. (=Normally Closed) contact
A contact that is normally closed (On state)
and opens a circuit (turn OFF) when it operates

c contact (Transfer contact)
Transfer contact (combination of 1a
contact and 1b contact)
A contact that has the functions of both a and
b contacts