Siemens SIMATIC PLC 6AG1055-0AA00-2BA0 SIPLUS S120    BASIC OPERATOR PANEL BOP20 FOR    ELECTRONIC CONTROLS    -25 ... +70 GRAD C    WITH CONFORMAL COATING    BASED ON 6SL3055-0AA00-4BA0    .    TWO-LINE DISPLAY, 6 KEYS    FOR PARAMETER SETTING AND    DIAGNOSTIC INFORMATION    SUITED FOR CONTROL UNITS    CU305, CU310, CU320 6AG10550AA002BA0