Because then we can avoid wrong wiring and possible short circuits. Summary So now we have learned that the DPDT relay stands for Double Pole Double Throw relay which means it has two independent switching contacts. It contains eight pins in total, two for coil and six for switching external load with supply.. The two schematic wiring diagrams below show how to wire an electrically latching relay circuit. This creates a basic memory function. the relay 'remembers' which switch was pressed last.
The DPDT Relay Latching Diagram is a valuable tool for any electrical or electronic engineer. It provides a visual representation of how a double-pole, double-throw relay works.. Latching power relay with DPDT double-pole, double-throw contacts, plus quick-connect or screw terminals flyback voltage protection, and printed circuit board for convenient mounting. May be used with model railroad 'snap' switches for position feedback, signal lights or routing frog power. Latching feature ensures that this relay will maintain its same position when system power is turned off.