Yes I am using the PT100 kit from E3D, plus their Titan and hardened nozzles on my Taz5.
Here are the pins that you need to connect to your PT100 (use the E3D PT100 AND use the E3D paired sensor kit):
On the PT100’s three pins you need to connect
Pin 1 (5V Analog Ext)
Pin 2 (GND Analog Ext2)
and Pin 4 (Ext 6 Analog ext pin #93)
The PT100 amplifier board has the legend for which pin is 5V, GND and signal printed on it, so just follow that.
Rambo analog extension pins below where X has a connector, 0 is open (if you are looking directly at the Rambo board):
X 0 X 0
X 0 0 0
The two pins on the other end of the PT100 connects to the paired sensor.You’ll need to disconnect the Hexagon’s old sensor connector and reconnect to the two pins of the PT100 (orientation is irrelevant here).
Change your pins.h and recompile in Marlin. Check your config.h as well - it must have the PT100 definition in there to work. You may have to use newer tables from Marlin which has the PT100 (but don’t use the newest Marlin set since it is sure to fail on compile - just add the sensor table alone).
This setup worked for me. I hope this helps you.