EM4100 format of the data is as follows. The total Card Serial Number is 40 bits.
The first 8 bits are 8-bit version numbers or customer IDs, and the last 32 bits are data bits.
[EM4100 Data Format]
[Reference Page: http://www.priority1design.com.au/em4100_protocol.html]
Various methods are used to indicate an EM card, and there is no standard for this.
Method 1.) Indicate Full Card Serial Number information without distinguishing between 8-bit customer ID and 32 data bits
ex) 322126887957
01001011 0000 0000 0100 0010 0011 1100 0001 0101
Method 2.) Indicate only 32 Data Bits part from full Card Serial Number information
The Data Bits are shown on the surface of the card. Or, it cannot be printed on the surface of the card if a customer doesn't want to print on the card.
ex) 4340757
0000 0000 0100 0010 0011 1100 0001 0101
Method 3.) Indicate each information for Customer ID/8 bit version number and 32 Data Bits
ex) 75 - 4340757
0100 1011 - 0000 0000 0100 0010 0011 1100 0001 0101
The first 8 bits are not indicated on the card surface and are hidden within the card. We call this a facility code.
The advantage of the facility code is isolation from other systems that might have a similar range of badge IDs.
The facility will have one or more facility codes on its cards, which help distinguish it from the other sites.
Example::
Site 1) Fac 75; Badge id 4340757
Site 2) Fac 60; Badge id 4340757
Suprema 2nd generation devices indicate using the method 1.
Please refer to the configuration below if your system needs to detect 32 data bits like method 2.
1) Log in to Biostar2 and then go to Settings > CARD FORMAT > Wiegand and click a pencil from one of the Wiegand ID lists.
2) Set the Total Bits and ID field to detect 32 data bits.
3) Click [Device] on the BioStar2 menu list and then, go to Authentication>CSN Card Format
4) Enable Format type with Wiegand and the modified Wiegand Format
5) Click [Apply] to store the configuration