The PT100 Daughter board is designed for the the whole range of Duet products. This expansion board allows up to two PT100 temperature sensors to be attached. PT100 Temperature sensors can either be 2 or 4 wire. Jumpers are on the PT100 Daughter board to switch between the two.
The Duet 3 and Duet 3 allow up to two daughter boards to be installed with a further 2 on the Duex2 or Duex5, so up to a total of 8 can be connected. PT100 and Thermocouples can be mixed and matched.