The F2-UNICON is a Universal Converter that converts RS-232 signal levels to RS-422 signal levels or RS-422 signal levels into RS-232 signals.  This converter is specially designed to be used with the DL05 and D2-240 CPUs.

Some of the great features the F2-UNICON offers is that it easily mounts to a DIN rail, it does not require an external power source (it receives power from the +5v pin on the D2-240 CPU port (bottom port) and the DL05 (port 2), and it also both transmits and receives LEDs to help simplify trouble shooting of the unit.