Master-Slave: When you configure a Master-Slave configuration through RS485, you cannot use BioStar 1 devices with BioStar 2 devices. The RS485 protocol between BioStar 1 and 2 devices is different and are not compatible.
Device tree: BioStar 2 devices will be always located on the BioStar Server tree regardless of the connection mode. With BioStar 1 devices, the devices are located on the BioStar Server tree when the devices are in the device-to-server connection mode.
Network tab: The RS485 mode of BioStar 2 devices have three different values: Default, Host and Slave. When the device’s RS485 mode is Default, the device works as a standalone device or its RS485 mode changes to Slave if it is connected to a Host device through the RS485 interface.
Input/output tab: BioStar 2 Devices only has the Input tab, because the BioStar 2 system has adopted the Trigger-and-Action concept. For more detailed information on the Trigger-and-Action concept, please refer to BioStar 2 Administrator Guide.
Wiegand tab: BioStar 2 devices have the extension mode only.
MIFARE card CSN: The byte order of a MIFARE card on BioStar 2 devices is opposite to the one on BioStar 1 devices. If the byte order of BioStar 1 devices is set to MSB, you need to set the byte order of BioStar 2 devices to LSB and vice versa.