Locknetics Switch Types

Single Pole - Single Throw

When in doubt, order this option.

This design is very similar to that of a light switch. When a connection is made, the current is allowed to pass from one pole to the other. Making a connection sends power on down the line.

Locknetics switches use this type of connection to signal to a power supply to go into action. A push button, for example, will complete the connection when the button is pushed. This signals the power supply it is time for action. That action is almost always to unlock a door.

There are internal components that ensure the signal sent is ''Momentary''. That is, a pulse signal is sent on down the line instead of a continuous signal (as in a light switch). A quick pulse of a signal is all that is needed to notify the power supply the unit has been activated.

Single Pole - Double Throw

For many products, this is the default operation since it can function as both SPST and SPDT.

By offering 2 output connections, the installer has the option to use just one or both connections. If just one ''out'' connection is used, the unit will operate as SPST.

If both ''out'' connections are used, then true SPDT operation is being used. The reason is the switch is always ''on''. It is always sending a signal.

When the switch is in position #1 it is sending a signal.

When the switch is in position #2 it is sending a signal.

The power supply on the other end is configured so it is always reading the position of the switch. When the switch is in position #1, the power supply wants to know and will behave one way (say lock a door). When the switch moves to position #2, the power supply wants to know as well and will behave in another way (say unlock a door). The switch is being constantly monitored by the power supply.

Double Pole - Double Throw

Same as Single Pole, Double Throw but with an extra set of wires.

There can be special cases where both a power supply and a remote monitoring unit are connected to the switch. The extra set of wires allows the connection of the monitoring unit.

In other words, the switch needs to communicate with two types of devices instead of the normal one device. Most often the switch just connects to a power supply. In special cases, it needs to connect to something else as well. The extra set of wire allows this extra connection.