Used/Refurbished: 
These interfaces have been tested and are in working condition
 
Epson Ethernet Network Interface Card (UB-E03) : Compatible all TM printers, electrically and mechanically.  Also this Interface Card is MIB supported in low-power consumption mode.
This interface card allows you to utilize your printer via your Ethernet port (RJ-45).  
Compatibility:
TM-H5000
TM-H5000II
TM-H6000
TM-H6000II
TM-H6000III
TM-H6000IV
TM-J2000
TM-J2100
TM-J7000
TM-J7100
TM-J7500
TM-J7600
TM-J9000
TM-J9100
TM-L90
TM-T70
TM-T88
TM-T88II
TM-T88III
TM-T88IV
TM-T88V
TM-T90
TM-U200
TM-U210
TM-U220
TM-U230
TM-U325
TM-U675
TM-U590
Additional Part Numbers:
M252A
C32C824541