Capable of delivering added ports for an SBC, Elma's 8005 2-port RS232/422/485 Asynchronous Communications Systems are economical I/O solutions for issues regarding more ports. These systems offer two 16550-based UARTs up to 155,000-baud. Their individual ports are capable of independent assembly to RS422 or RS232 levels, and are available through the forward panel (utilizing DB-9 connector).