KevinGSWatt wrote

We use Citizen E300 with Archer T2U Nano USB adators in a USB slot on the network card.

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  @KevinGSWatt 

Hi,

Do I understand this right that you have a (label) printer from Citizen and you are plugging the Archer T2U Nano directly into the USB port of that printer?

If yes, then you are actually very lucky that the "other" Archer USB Wi-Fi adapter you mentioned does work in combination with that Citizen printer. If you need to connect additional printers of that type, then I think the way to go would be to get another one of the Archer USB Wi-Fi adapter that works. (make sure it is the exact same hardware version, since different hardware versions of the same Wi-Fi adapter model might utilize different Wi-Fi chips)