Normally Open Spst Wiring Diagram. It has six connections 1 2 at one end. Normally open single pole single throw spst relay in figure 1 no dc voltage is applied to points a and b therefore no current flows through the coil of the relay the contact stays in the opened position and the fan will not be switched on because its disconnected from the 220v.
12v 200a normally open 4 pin relay heavy duty automotive marine split charge high power car. Normally open and normally closed for instance the following diagram shows a normally open pushbutton switch controlling a lamp on a 120 volt ac circuit the hot and neutral poles of the ac power source labeled l1 and l2 respectively. This type of switch either opens or closes one circuit.
12v normally open relay diagram wiring schematic how to connect a dpdt relay in a circuit how to wire a relay 5 pin relay wiring diagram auto wiring diagram no spst relay normally open relay control wiring electrical contacts normally open and circuit opening relays on toyotas bluetwentyeight ra28 starter kill normally open relay wiring.
Spotlight wiring diagram 4 pin relay how to wire a step by 40 amp 12v 40a bosch g full 5 lights pdf spst spdt. You can see that a spst toggle switch only has 2 terminals. Normally open relay diagram in the above picture you can see a normally open relay diagram in which the relays high amperage circuits contacts are open and do not have a connection. Normally open single pole single throw spst relay in figure 1 no dc voltage is applied to points a and b therefore no current flows through the coil of the relay the contact stays in the opened position and the fan will not be switched on because its disconnected from the 220v.