USB Limitation information
Unfortunately standard USB PC/SC smart card readers have several serious limitations when using more than just a few card readers:
Linux does not strictly impose any limits on the number of smart card readers connected, however some files may need to be changed to achieve the maximum number of card readers. Windows Vista and Windows Server 2008 (Not R2) and earlier Windows versions do not impose these operating system limits. The reader limits then are just the limits imposed by the hardware.
Recognising these limitations of multiple USB smart card readers Lisle Design has developed an alternative range of smart card readers - the Hyper Card Rack™ 120, Hyper Card Rack™ 20 and the Hyper Card Desktop™ 6.
If you have any more questions, please get in touch.