The D-SUB connector is the industry standard connector used on many nic series modules. For the most part, d-sub accessories only differ in the pin count of the connector. A new economical connector has been added to the d-sub series. This new family targets a growing number of applications that require fewer mating cycles, such as set-top boxes, controllers and electricity meters. The economical D-SUB connector series is used for applications with fewer mating cycles, such as enclosures, control equipment and energy meters: For such applications, the demand is high, and the economical circuit board direct welding series.

The D-SUB connector is one of the earliest solutions and the most diverse and widely used input/output connector system.