The Siemens SIRIUS 3RT2936-4NA00 is an adapter S2 that carries a built-in auxiliary switch block from the 3RH29..-…..-0MC0 family, finished in titanium grey. It is designed to mount directly onto a SIRIUS contactor to add auxiliary contact capacity without separate wiring or additional DIN-rail space.
What the auxiliary switch adapter does
This adapter bolts onto the front of a SIRIUS contactor (size S2) and provides the contact arrangement of a 3RH29 auxiliary switch block. It eliminates the need for a separate auxiliary contact block and its associated wiring, saving panel space and reducing assembly time. The titanium-grey housing matches the standard SIRIUS color scheme.