Allen-Bradley 800EM-E4 is a red pushbutton expansion module in Rockwell Automation's 800E family, intended for use with RediPanel pushbutton assemblies. The 800EM-E4 adds an additional pushbutton station to a RediPanel system, enabling expanded operator input without replacing the base controller. Rockwell's published literature groups 800EM-E4 among legacy 800E pushbuttons, and support materials note obsolescence for several 800E variants, which can affect availability and compatibility with newer equipment. Illumination can be achieved with compatible lamp modules in the 800E family, such as the 800E lamp modules used to light the signal when energized.
