Siemens logo 6 7 and 8 sps plc expansion modules siemens 6ed1055 1mb00 0ba2 the siemens logo 8 dm8 1224r expansion module extends the logo 8 programmable logic controllers with 4 x additional digital inputs and 4 x digital outputs each relay output is capable of carrying 3a continuous current with an inductive load or 5a with a resistive load siemens 6ed1055 1mb00 0ba2 logo 8 sps plc expansion module dm8 1224r