Other Limitations - Epson C32C824151 - UB E02 Print Server Technical Reference Manual

The following printers cannot use the UB-E02.
TM-J8000, TM-T285, RP-U420

1.4 Other Limitations

Be sure to note the following:
When the UB-E02 is installed, the display module connector (DM-D) of the TM printer
cannot be used.
CAUTION:
Do not connect the Ethernet connector cable to the display module connector (DM-D)
or the drawer kick-out connector.
1-2 System Preparation Rev. A