Siemens logo 6 7 and 8 sps plc expansion modules siemens 6ed1055 1cb00 0ba2 the siemens logo 8 dm8 24 expansion module extends the logo 8 programmable logic controllers with 4 x additional digital inputs and 4 x digital outputs each transistor output is capable of carrying 03a continuous current siemens 6ed1055 1cb00 0ba2 logo 8 sps plc expansion module dm8 24