Modular switch contact blocks provide the electrical contacts needed to integrate with the circuit being controlled. These are the components that also allow the installer to choose the type of switch being used. For instance, they may be maintain, momentary, 1- or 2-pole designs or others.
These components need to be selected with attention given to the operating conditions under which they will be expected to perform. Like all electrical components, they have save operating temperature ranges and other considerations that have to be taken into account. They also come in standardized designs, which makes them easier to select if you have to use them with an A02 Series component, and so forth. There are many different designs, some of which are intended to provide compact solutions to arrays with a great many switches attached to them.