Can I connect a 3rd party scanner or label printer to the PLT?

Yes!  The PLT has 4 USB ports in the back for accessories like scanners and label printers.  You can buy these accessories from your preferred vendors.  Here are the models we have tested with already:

Zebra Label Printers
GX430t (medium-sized, benchtop)
QLn220 (small, portable)

Zebra Scanners (Barcode Readers)
LS2208, LS4208 (1D scanners)
DS4208, DS6708, DS8108 (2D scanners)

In our own production areas, we typically scan an incoming unit, execute a test plan with the PLT, and then have it print out a serial number label if the tests all pass.  If a test fails, an "NG" label is printed with the test that was failed on it.  This is implemented within the test plan itself.