... 1x8 ch,AI810 Analog input 1x8 ch.AI820 Analog input 4x1 ch.AI830 Analog Input 1x8chAI835 Analog input 8 ch. Thermocouple ... 1x8 ch,AO810 Analog output 1x8 ch,AO820 Analog Output 4x1 ch,AO845 Analog Output. Redundant or singleAO890 Analog Output 1x8 ...