AS-BDAP-216 SCHNEIDER

Appendix B: Defining a Custom ABA String Format

148 Schneider Electric

T332222...

For every combination of shared fields (two, three, or four fields), the 

following table tells you which hexadecimal integer to use in your 

string structure. 

Note: Each integer in the above table is the sum of the integers that 

represent the shared fields (1 for site code, 2 for card number, 4 

for issue code, and 8 for manufacturer code). For example, a 9 

specifies a share between the site code field (1) and 

manufacturer code field (8) — in other words, 1 plus 8.

Remember the string structure must be fixed-length.

To share digits in 

these fields...

Use this Shared 

Hexadecimal Integer

Card Number 

Site Code

3 (represents 2 + 1)

Site Code 

Card Issue Code

5 (represents 1 + 4)

Card Number

Card Issue Code

6 (represents 2 + 4)

CardNumber

SiteCode

Card Issue Code

7 (represents 2 + 1 + 4)

Site Code

Manufacturer Code

9 (represents 1 + 8)

Card Number

Manufacturer Code

A (represents 2 + 8)

Card Number

Site Code

Manufacturer Code

B (represents 2 + 1 + 8)

Card Issue Code

Manufacturer Code

C (represents 4 + 8)

Site Code

Card Issue Code

Manufacturer Code

D (represents 1 + 4 + 8)

Card Number

Site Code

Manufacturer Code

E (represents 2 + 1 + 8)

Card Number

Site Code

Card Issue Code

Manufacturer Code

F (represents 2 + 1 + 4 + 8)