6AV3515-1MA20-1AA0 OP15/C1 OPERATOR PANEL 4 LINE DISPLAY, 20 CPL OR 8 LINE DISPLAY, 40 CPL WITH INTEGRATED INTERFACES 2 X TTY/V.24 AND 1 X RS422/485 256 KB USER MEMORY
6AV3515-1MA01 OP15/B OPERATOR PANEL 4 LINE DISPLAY, 20 CPL 8 MM CHARACTER HEIGHT OR 8 LINE DISPLAY, 40 CPL 4.5 MM CHARACTER HEIGHT WITH INTEGRATED INTERFACES