Epson CEPS-012 DB9 to DB25 Null Modem Cable
Overview
The Epson CEPS-012 is a 6-foot null modem cable that bridges legacy serial communication between Epson thermal printers and host systems using DB9 male and DB25 male connectors. Null modem wiring (cross-connected transmit/receive lines) eliminates the need for an external converter or gender adapter when connecting a printer with a DB9 port to a system with a DB25 serial interface, or vice versa. This cable solves the connector-mismatch problem in warehouse, retail, and logistics environments where legacy serial printers remain in service.
Compatibility
The CEPS-012 works with Epson thermal printer models equipped with either DB9 or DB25 serial ports. Verify your printer's serial port type and gender before ordering. The 6-foot length fits standard bench-top and wall-mounted installations within typical warehouse and point-of-sale distances. If your host system or printer uses RJ-45 serial (console port), or if you require USB-to-serial conversion, this cable will not suffice — confirm connector types on both ends of your link first.
Installation Notes
No special tools or torque specifications are required — DB connectors hand-tighten. Test serial communication at 9600 baud (the standard for Epson thermal printers) after installation. If the printer does not respond to commands, verify null modem pin assignments (TxD and RxD should be crossed); if they are not, the cable has failed or was routed into a standard (non-null) serial cable by mistake. The cable does not supply power — it carries control signals only. Thermal printers must draw power from their dedicated power supply.
