The MAX31785 has four configurable I2C temperature sensors and 6 internal thermal diodes. Either one can be used to control fan speed or to monitor temperature or report any faults.
Using the MAX31785AEVKIT software the data can be read and can be configured to control Fan or monitor temperature.
By removing the DS3900 on the EVKIT and by connecting I2C communication pins to the MAX31785EVKIT the temperature sensor's data can be monitored using the GUI.