RS-485 witth WIZ120SR or WIZ127SR

The WIZ127SR explicitely claims to support RS-485 by providing the direction signal by RTS while CTS is ignored. May I use the WIZ120SR and apply CTS active or should I better employ the WIZ127SR. For the WIZ127 the manual informs about the exact positions of the 3 12-pin headers J1, J2 and J3 but does not tell which is which and on the photo, one of them is unpopulated. Is that module ready?


Please refer to below image and “2.4.2 RS485/422” section of user manual version 1.11.