What it is and what it does
The Siemens 3RH1911-1MA11-ZX95 is an auxiliary switch block in the SIRIUS 3RH1 family, offering 1 normally open and 1 normally closed contact with screw terminals in size S00. It connects from below and is designed for auxiliary and motor contactors, snapping onto the contactor or onto a DIN rail in the panel.
Deployment context
Size S00 mounts directly on SIRIUS contactors in that frame size or on a DIN rail. The screw terminals accept standard control wiring from below, which keeps the wiring tidy in a panel with multiple contactors stacked side by side.