Difference SCC-PWR01 PWR02 PWR03

[OnlyOne]

Hello,
what is the difference at the SC-2345 between:

777722-01 (SCC-PWR01)
777722-02 (SCC-PWR02)
777722-03 (SCC-PWR03)

What i dont understand are the last two numbers (01,02,03). What are they for?

Thanks for your help.

[OnlyOne]

Ok thank for reading. Meanwhile i found the answer in the datasheet:

SC-2345 carriers have three power options:
• SCC-PWR01 – 5 VDC from the DAQ device or an external supply
• SCC-PWR02 – universal AC external supply
• SCC-PWR03 – 7 to 42 VDC external supply module (power supply
not included)