อินเทอร์เฟซเครื่องพิมพ์ใบเสร็จ POS อธิบายชัด: USB, ซีเรียล, อีเทอร์เน็ต, บลูทูธ — และวิธีเปลี่ยน

A receipt printer’s interface decides how it fits your counter: tied to one PC, shared on the network, or wireless for a tablet. Pick by how your POS is built — and remember that on many printers the interface is a swappable card, so you’re not locked into today’s choice. Quick orientation:

Each interface trades simplicity, reach and flexibility differently. The headline comparison:

The reason you can “change” a printer’s connection is that on many models the interface isn’t built into the mainboard — it’s a separate interface module (Epson markets these as UB-series UIB cards) that slots into a bay at the back. Swap the card, change the connection.

Before ordering a card, confirm two things: that your printer model actually takes a modular interface (not all do — some have a fixed, built-in interface), and which card part number corresponds to the connection you want. Then it’s a quick swap in the rear bay.

Walk your deployment through this short decision flow to land on the right interface:

Whether you’re fitting a new printer or switching an existing one’s interface card, the bring-up sequence is the same:

A printer that’s connected but silent is almost always a configuration mismatch. Check in this order:

Browse interface cards and modules in our printer interface cards and interface cards categories, and cables in cables & connectors. If the printer powers up but won’t print at all (not just a connection issue), start with our receipt printer troubleshooting guide. Tell us your printer model and the connection you need and we’ll match the right interface card before you order.