Printer Interface Cards - POS terminal parts and components

Printer Interface Cards

RS485, RS232 interface boards and logical cards for POS printers

24 products

Replacement and add-on interface cards specifically for POS receipt printers — Epson TM-T88 series UB-S01/UB-U05/UB-E04 interface modules, Star IFBD series, Bixolon and Citizen serial/USB/Ethernet add-on cards. When the network port on your printer fails or you need to convert a serial printer to Ethernet, swapping the interface card is faster and cheaper than replacing the whole printer. Each card listing notes which printer model and revision it fits.

Frequently asked questions

Can I swap a UB-S01 (serial) for a UB-E04 (Ethernet) on the same printer?
Yes — Epson designed the TM-T88 series with interchangeable interface modules. Power down the printer, unscrew the rear panel, swap the card, screw the new card in. The printer auto-detects the new interface on next power-up. Driver-side, install the corresponding Epson driver for the new connectivity.
Do interface cards need to match the printer revision (V, VI, VII)?
Within the same series, generally yes — Epson revised the connector pinout between TM-T88V and TM-T88VI, for instance. Always cross-reference our listing's compatibility note before ordering, and if in doubt, send us the printer's full model number including the revision suffix.
What if my printer has a permanent (non-modular) interface?
Older or budget thermal printers have soldered-on interfaces that aren't field-replaceable. In those cases, a USB-to-serial or Ethernet-to-USB converter externally is the workaround, or a printer replacement is the more reliable path.
Are wireless (WiFi/Bluetooth) interface cards reliable in retail environments?
WiFi cards work well for back-office and small-store deployments. In multi-lane stores with dense 2.4 GHz traffic, hard-wired Ethernet is more reliable. Bluetooth is fine for short-range, single-pairing use (e.g. mobile cashier setups) but doesn't scale to fleet deployments.