Siemens logo 6 7 and 8 sps plc expansion modules siemens 6ed1055 1mm00 0ba2 the siemens logo 8 am2 aq expansion module extends the logo 8 programmable logic controllers with 2 x additional analogue outputs each output can be configured for 0 to 10v or 04 to 20ma operation siemens 6ed1055 1mm00 0ba2 logo 8 sps plc expansion module am2 aq