The card has several uses, ours is for loading the program and firmware on the 2080-LC20-20QWB and the 2080-LC20-20QBB for our trainers, we sell a lot of them and its easier to have an SD card with the program and the firmware ready to go, once its built we put it in and power up... First the PLC will flash to the firmware that we have loaded on the SD, this save a ton of time as it take long to load it from a PC, next it will load our same program to test the I/O on the trainers, we need to verify that the PLC is wired correctly and that all the I/O works as it should.
If you need to purchase one see this link https://www.plccable.com/allen-bradley-aftermarket-2080-sd-2gb-micro820-sd-memory-card-2gb/
Below are some links that should help accomplish what is needed on your end.
Micro820 user manual see chapter 9 https://literature.rockwellautomation.com/idc/grou...
PLC Talk user forum http://www.plctalk.net/qanda/showthread.php?t=110987
On our configure text code is below, you can also download ours so see a working example, this will need to be on the flash with the other info, once the SD is in the PLC the PLC will read the text file first, below we are loading the firmware, then loading the program (Micro820), on page 101 of the manual you will find the instructions that you can do with the SD
[FWFILE = firmware\2080-LC20-20QBBAB_12.011_1K.nvs]
[FWDOWN = 0]
This is a link to our SD we use www.plccables.com/MicroSD.zip