I.R.I.S. Cardiris Pro 5 - Manual (Page 38)

Chapter 5 – Scanning business cards
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Cardiris scan both landscape and portrait oriented business cards.
Note, however, that scanning landscape oriented cards is faster than
scanning portrait oriented cards.

If you want to scan the front and back sides of cards, select the
option Scan two-sided card. This way the duplex scanning
mode is activated. When scanning business cards you will first
be prompted to insert the front side of your card, then the back
side. (This does not apply to IRISCard Mini)

When you select an IRIScan scanner no configuration screen
will be displayed. The IRIScan settings must be set after you
click the Scan button.

When you select another type of scanner a different
configuration screen will appear.