Siemens simatic s7 200 em 235 analogue i o module siemens 6es7235 0kd22 0xa0 this unit is an analogue i o module for use in the s7 200 family of plcs the module features 4x analogue inputs with a wide selection of voltage ranges and a 32ma current input range there is 1x analogue output with voltage and current ranges of 10 to 10v and 0 to 20ma siemens 6es7235 0kd22 0xa0 em 235 analogue input output module