The Siemens 5TG2021-1 is the field-terminated variant of the DELTA m-system VGA connection socket. It provides the same 15-pole high-density D-Sub interface as the pre-assembled 5TG2021-0, but ships as separate housing and insert components. The installer pulls the VGA cable, lands the individual cores on the screw terminals, then assembles the module into the frame — a workflow that suits conduit installations where the cable goes in before the faceplate.

Why two variants of the same VGA socket?

The -0 (equipped) and -1 (screw connection) split exists across the entire DELTA m-system communication range — HDMI 5TG2020, VGA 5TG2021, and USB 5TG2022 all follow this pattern. The equipped version (-0) comes pre-assembled: open the box, terminate the cable, clip into the frame, done. The screw-connection version (-1) is supplied unassembled: the installer builds the module from its housing and insert during installation. The choice is about installation workflow, not functionality — both deliver the same 15-pole VGA connection at the wall. If you are replacing an existing socket or doing a quick retrofit, the -0 is faster. If you are pulling cable through conduit and want to terminate after the plaster is dry, the modular -1 gives you more flexibility.

Which frames does this fit?

The 5TG2021-1 is a 55×55mm modular insert compatible with all DELTA i-system, DELTA line, DELTA miro, DELTA profil, and DELTA style frame systems. A single module holder can combine up to two different functions — for example, one VGA socket plus one 3.5mm audio socket in a dual frame for a complete AV wall plate.