I wouldn’t suggest this as a solution, at least not an easy one.
Just to clarify
You already have the reader Software installed on a Raspberry Pi And you just want 10 card readers that “talk” to your Pi?
For the Raspberry Pi, I think the PN532 is the most common NFC reader, but i’m not sure if these can be run as multiple readers.
I assume since you are asking for HID iCLASS DP you are already using these for your workplace, so you would like to use the currently issued cards for the Machine usage!?
Do I have that correct?
If I am correct with you already having HID iCLASS DP in use, I would guess these go back to an access control system. If this is the case, could you simply get some more readers that you use on the door? Rather than this opening a door, it would simply “check in” at a machine as this would be recorded on the control system, and the reader name would be provisioned with the machine name…make sense?
Outside of these options, my first thought was a Time Clock type of setup
Maybe something like this
Other people may have other ideas…
Just some thoughts to get this rolling…