However, manufacturers who provide "all connection systems" from one source have a clear advantage. They can cover the various requirements of global markets for industrial and process automation as well as transport engineering.
From screw connection to IDC system. This inconspicuous insulating unit with "clamping function" for the electric wire embodies a good portion of expertise; for modular terminals have to cope with all kinds of adverse conditions in everyday use. The connection systems are chosen depending on the particular application.
Basically, we distinguish between the following connection systems: screw connections or screwless connections (spring connections), soldered connections, push-in connections, e.g. flat blades, solderless connections such as Termi-Point® or Wire-wrap®, and the insulation displacement connection (IDC).
Upon closer inspection it becomes clear that the requirements placed on what would seem to be a simple component, i.e. the modular terminal, are really quite considerable. Accordingly, EN 60 947-7-1 defines modular terminals or conductor connectors as devices for connecting or joining electrical lines. Modular terminals can be installed in rows or groups, have two or more mutually dependent connection points and are isolated from each other and from their fixings.
Modular terminals are designed for connecting and fixing two lines with the same cross-section. They are fitted to, for example, terminal rails. Besides the joining of lines, modular terminals have other functions: when fitted with labels they result in a clear layout of the "electrical plant". Apart from that, they create a defined connection point.
From here the wiring is routed to the individual pieces of equipment inside or outside the electrical cabinet. Modular terminals improve the needs of servicing because electrical measurements can be carried out here, and circuits can be readily disconnected or provided with appropriate protective devices.