AS-INTERFACE ENCLOSURE FOR COMMAND DEVICES, 22MM, ROUND, ENCLOSURE MATERIAL PLASTIC, ENCLOSURE TOP PART GRAY, 3 COMMAND POINTS PLASTIC, RECESS FOR LABELS, C=INDICATOR LIGHT CLEAR, LABEL WITHOUT INSCRIPTION, B=PUSHBUTTON GREEN, LABEL: I, 1NO, SPRING-TYPE TERMINAL, A=PUSHBUTTON RED, LABEL: O, 1NC, SPRING-TYPE TERMINAL, BASE MOUNTING, INSULATION DISPL. METHOD AT TOP