The new CLICK PLUS 2-slot CPU offers an additional built-in option module slot for even more PLC I/O customization. The CLICK PLUS option module slots allow for easily changeable I/O configurations to match the job at hand in lieu of the fixed I/O offered in the original CLICK series PLCs. The 2-slot CPU can also be expanded with up to 8 additional stackable I/O modules for up to 156 discrete I/O or 60 analog I/O points total. For applications that rely heavily on serial communication, the new CLICK PLUS DCM option module adds two RS-232/RS-485 serial ports to any single-slot CLICK PLUS CPU and up to four additional serial ports to the 2-slot CPU version. This new module supports both Modbus RTU and ASCII communication and is priced at $105.00.