The DGM1D is a 1-door MIFARE® access control that has two operating modes. On the one hand, the "White List" mode is an operating mode that does not require the PCV123D programmer, but is limited to 200 users. On the other hand, the "Black List" mode requires the use of the PCV123D programmer to save an identification code of the installation (the "Site Code") in the memory of the DGM1D and the cards, allowing an unlimited number of users. for that DGM1D panel. Dimensions: Central DGM1D: 78 x 57 x 24 mm. Reading head (Dia. x Depth): 44 x 41 mm. Up to 100 users per installation.