Siemens 6ED1055-1CB10-0BA2: Compact I/O, Practical Expansion For many machine builders, the answer is not necessarily a new controller. Sometimes the more practical approach is to extend the existing system with the right I/O module. The Siemens 6ED1055-1CB10-0BA2 is designed precisely for this kind of requirement. Siemens identifies the unit as the LOGO! DM16 24 expansion module for LOGO! 8, prov...