Konica Minolta BIZHUB C30P - Manual (Page 250)

Duplex Option 236
Duplex Option
Duplex (Double-Sided) printing can be performed automatically with the
duplex option and enough memory installed. See “Duplexing” on page 126.
Installing the Duplex Option
1
Turn off the printer.
2
Remove the cover on the right
side cover.