We set RS422 mode on MOXA.
Connect to the PLC through a general RS232 cable failed throught a MOXA. I understand we need to make a special cable. I founded in Internet forum's two schemes:

and

So...
The following cable wiring is required for connect MOXA to the PLC:
DB25M<->DB9F
15 <-> 1
2 <-> 2
3 <-> 3
16 <-> 4
I'm right?