RS232 - TTL

Can someone explain me please how to connect this chip with BB?
http://www.ebay.com/itm/1pcs-USB-To-RS232-TTL-Converter-Adapter-Module-PL2303-good-/231103817264?pt=LH_DefaultDomain_0&hash=item35cedc6630

I connected both of the grounds, but it seems that there is no pinout for TXD/RXD on BB except on RS232 chip?

Thank you!
P.

Which Beagleboard do you have?

Gerald