Readers for access control with EM4102 chip
These external readers send the UID code of an EM410x tags to the access controller via the Wiegand interface (WEG26/34). The authorization of the transponder is then checked in the controller. If the RFID tag was previously authorised in the controller, the relay now switches and the door can be opened. The internal switching of the relay ensures that access control is safe from tampering with the housing or cabling. The evaluation and switching process takes place from the secured access area.