Citizen IF1-RS01 Serial Interface Module

The IF1-RS01 is a serial interface card that adds RS-232 connectivity to compatible Citizen receipt and label printers. Deploy this module when your integration requires legacy serial communication or when network connectivity is not available at the installation point. Common scenarios include integration with older POS systems, warehouse management terminals, or kiosk environments where a direct serial line to the printer is the most reliable data path.

Compatibility

The IF1-RS01 installs on the following Citizen printer models:

CT-S600 series (compact receipt printer)

CT-S800 series (compact receipt printer)

CL-S400DT (label printer)

CL-S6621 (label printer)

CL-E720 (edge label printer)

Confirm your printer model before ordering to ensure mechanical and electrical fit. Installation requires access to the printer's internal interface slot — verify that your printer supports optional interface module installation and review the printer's documentation for slot availability and positioning.

Installation Notes

This is a passive interface card; it does not require separate power. Secure the module into the designated interface slot on the printer mainboard. Cable management depends on your printer's enclosure design — ensure RS-232 cable routing does not obstruct paper feed or access panels. Test serial communication and printer command flow after installation before placing the printer into production.