Using Arduino Uno as a USB-TTL serial link to Casio FX-850P ?

[Dan C]

As i have an Arduino Uno board, i was thinking of using it as an USB-TTL serial link to my FX-850P
to transfer programs and memo data between my PC and the FX-850P.
And then use a standard terminal program like Putty on the PC to transfer the stuff.

I was thinking wiring it up like this:
   

What do you think? Is it a possible way to do it?

edit: I added the RESET to GND connection.