AS-INTERFACE ENCLOSURE FOR COMMAND DEVICES, 22MM, ROUND, ENCLOSURE MATERIAL PLASTIC, ENCLOSURE TOP PART GRAY, 2 COMMAND POINTS PLASTIC, RECESS FOR LABELS, B=PUSHBUTTON WHITE, LABEL: I, 1NO, SPRING-TYPE TERMINAL, A=PUSHBUTTON BLACK LABEL: O 1NC, SPRING-TYPE TERMINAL, BASE MOUNTING, INSULATION DISPL. METHOD AT TOP