The 5570 ControlLogix series was released in November 2011; it was the first series without a RS232 port, however, it was the first one to provide the user with an USB interface.
5580 ControlLogix series was released in 2015; in addition to the USB port L8x CPUs provide an on-board 1Mbps Ethernet port.
The 5560 series was the last ControlLogix CPU containing a Serial RS232 port; L6xs were available up until 6/1/2017 and discontinued thereafter.