Encoding Defination:
A–Code: is used for sensors, DC power supplies and 1 Gbit Ethernet
B-Code: is PROFIBUS
C-Code: AC power supply
D-Code: is 100 Mbit Ethernet
X-Code: is used for 10 Gbit Ethernet
S-Code: AC power supply (will eventually replace C-coded power components)
T-Code: for DC power supplies (will eventually replace A-code power components)
The A, B, D and X codes are the most common.