Posiflex 21863233802 RJ50M to DB9M Cable 18" RT Series
Overview
The Posiflex 21863233802 is an 18-inch RJ50M-to-DB9M serial adapter cable designed for RT Series point-of-sale terminals. This cable bridges an RJ50 connector (modular, eight-pin interface commonly used for serial/device connections on modern POS systems) to a legacy DB9 serial port (standard 9-pin RS-232 connector), solving the compatibility problem when integrating RT Series terminals with older peripherals, PC-based POS software, or serial input devices that only support DB9 connectors.
Compatibility
This cable is designed specifically for Posiflex RT Series terminals. The RJ50 end connects directly to the terminal's serial interface port, while the DB9 male connector accommodates legacy RS-232 devices such as pole displays, customer displays, receipt printers with serial interfaces, or host PC serial input cards. Verify your terminal model includes an RJ50 serial port before ordering — not all POS terminal variants use this connector type.
Installation Notes
The 18-inch length provides moderate reach between a terminal mounted on a counter and a peripheral positioned directly below or beside the POS station — typical for compact register layouts. DB9 serial connections are unshielded RS-232; keep this cable away from high-voltage power lines or heavy electromagnetic interference sources to avoid signal corruption. No additional drivers or configuration are required beyond standard serial port settings in your POS software (baud rate, data bits, stop bits, parity — confirm these match your device datasheet). The cable is passive and non-powered.
