Banner Engineering SSA-EB1PLXYS1-02ECQ5B Emergency Stop Switches SSA-EB1 30 mm Mount Emergency Stop Push Button; Yellow-Flash Illuminated Base; 40 mm Actuator; IP65; Contacts: 2 NC; 5-pin M12 Integral QD; Safety BUS Node Compatible CH1=pins1&4 CH2=pins2&5; ESC-1-YW Button Shroud Installed