Siemens 6ED1055-1CB00-0BA2 LOGO! expansion modules. Siemens 6ED1055-1CB00-0BA2 is the exact printed commercial reference for a programmable logic relay in the LOGO! Logic Modules range. Siemens' official product description is: LOGO! DM8 24 expansion module, PS/I/O: 24V/24V/trans., 4 DI/4 DO for LOGO! 8.