Modular Design Various accessories options, such as I/O extension cards, encoder feedback cards, communication cards, hot pluggable LCD keypad, removable terminals and removable fans I/O extension card PG (Encoder) card Relay extension card Communication card 24V power shift card *NOTE: " u " are optional accessories. ■ Removable terminals Convenient wiring and safety equipment. Analog I/O switch Termination resistor Dual RJ45 communication ports 9