This video demonstrates how to configure the new XBEE S2C Modules using XCTU software.
The function set of the new S2C module is ZIGBEE TH Reg & family XB24C. It has both UART & SPI communication & covers more range compared to other models.
The firmware can also be uploaded for 802.15.4 , as that of old S1 module.
https://alselectro.wordpress.com/2017/01/23/zigbee-xbee-s2c-how-to-configure-as-coordinator-router-end-device/
