3SU1851-0AG00-4NB1 - Siemens
Enclosure for command devices, 22 mm, round, enclosure material metal, enclosure top part gray, 1 control point metal, A=Pushbutton yellow, 1 NO, spring-loaded terminal, floor mounting, silver label, black font, with graphic symbol: Error, M12 connector (5-pin) bottom, insulated reserve conductors Label glued in