ADS124S08: Multiple Three-Wire RTD Measurements, how about three RTDs?

Hi Bryan，

I have a further question about three-wire RTD measurement with ads124s08. From "A Basic Guide to RTD Measurements" figure 2-10, one ads124s08 can connect 3 RTDs with 3-wire mode. Not 4 RTDs as 4-wire mode. Would you please help confirm it? 

Thanks,