The Siemens 6GT2821-8AC10 is a SIMATIC RF200 RF280R RFID reader with an integrated antenna and RS422 interface using the 3964R protocol. It operates at 13.56 MHz (HF) and reads ISO 15693 and ISO 18000-3 transponders — the MDS Dxxx family — making it a drop-in for Siemens RFID infrastructure on conveyor lines, pallet identification, and work-in-progress tracking stations. The IP67 rating means the reader body and the integrated antenna survive washdown environments — food processing, automotive paint shops, or outdoor gate readers. The 200 mm read range depends on the transponder type; for the actual range with your tag, Siemens provides an application note (support.automation.siemens.com).
The housing is PA 12 (silicon-free) in Ti gray, 160 mm deep × 80 mm wide × 41 mm tall. Fastening is via 4 × M5 screws — no DIN-rail clip, so plan for direct panel or bracket mounting. Shock resistance is EN 60721-3-7 Class 7 M2 at 500 m/s²; vibration at 200 m/s² — rated for machine-mounted applications near presses or conveyors.
No last-time-buy window is active. If you are stocking spares for an existing RF280R installation, this is the exact match — no rewiring or reconfiguration needed.