The expansion board is used to control sliding or roller doors. For example, Dortec or Tadiran. The board is connected to the controller by a cable with RJ-45 connectors.
Download:
Expansion card Dortec_Tadiran.pdf
Dimensions [mm]: 50 x 80 x 20
Supply voltage 24 Vdc.
Current consumption: 100 mA @ 24Vdc