There are two data files, O0, which stores values from digital output cards, and I1, which stores values from digital output cards.
The addresses within each data file are set by the I/O rack and module in which the I/O card resides.
The MicroLogix 1100 comes with 10 digital inputs, 2 analog inputs, and 6 digital outputs included as part of the controller unit.
The MicroLogix 1100 allows for up to 4 additional 1762-series I/O cards that “bolt onto” the CPU module through a card-edge connector.
Digital input and output, analog input and output, thermocouple input, and RTD input cards are available for expanding the I/O.