The Siemens 6GT2801-3AB20-0AX0 is a SIMATIC RF300 RF382R RFID reader operating at 13.56 MHz with an integrated special antenna. It reads RF300-specific and ISO 15693 transponders (MDS Dxxx family) in ISO Scan Mode, using a lateral antenna field for serial connection to control systems. Communication is via RS422 or RS232 over an 8-pin M12 connector. The RS422 interface supports cable runs up to 1000 m; RS232 is limited to 30 m. Maximum transfer rate on the radio link is 106 kbit/s. Typical read access per byte is 0.13 ms. The reader is not multitag-capable — it reads one transponder at a time.
The reader measures 160 x 80 x 41 mm and mounts via 4 x M5 screws. The anthracite PA 12 housing is sized for direct machine-mounting or bracket installation — no DIN-rail clip, so plan for screw-down integration into the panel or machine frame. The 8-pin M12 connector carries both power and RS422/RS232 signals. The 3-color LED gives local status indication without needing a connected controller.