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Schneider Electric has 3 adapters (reducer) available that can provide a solution to the requirement for mounting a 22mm pushbutton or other control and signaling device in to a 30mm cut out (hole in control panel / station);
This adapter enables a standard 22mm pushbutton such as the 'Harmony' ZB4BA3 + contact body sub assembly to be mounted flush in a 30mm cut out.
This adapter enables a standard 22mm pushbutton such as the 'Harmony' ZB4BA3 + contact body sub assembly to be mounted in a 30mm cut out, the adapter doubles up as a legend holder.
The legends that are compatible with this adapter are the 30 X 40mm type, such as ZBY2101 (suitable for engraving white text on black or red background).
This adapter is similar to the ZB2BZ4 (above), but is designed specifically to allow an existing 30mm legend to be retained.