What it is and what it does
The Siemens 6GT2811-4AA00-2AA1 is an RF600-series UHF RFID reader operating in the 920 to 925 MHz band, built for reading EPCglobal Class 1 Gen 2 / ISO 18000-6C transponders. It connects to communication modules via an M12 8-pin interface and supports up to two external antennas through RP-TNC connectors, with antenna cable runs from 1 m up to 40 m. Rated read access at 1 ms per byte typical, write access at 6.3 ms per byte typical. The reader is multitag-capable and silicon-free, suited for clean-room or outgassing-sensitive environments.
Key ratings and what they mean for fit
The 6 m maximum read range is the standard figure; extended ranges are possible per the RF600 System Manual. That range is line-of-sight for a typical passive UHF tag — expect shorter distances through material or with smaller antennas. The 920–925 MHz frequency band covers the UHF RFID allocation used in most of the Americas and parts of Asia; verify local regulatory approval if deploying outside those regions. Supply is 24 V DC nominal (21.6 to 30 V DC range), drawing 0.47 A maximum, 0.395 A typical. Plan the 24 V bus accordingly if daisy-chaining multiple readers on one supply. IP65 protection means the housing is dust-tight and protected against water jets from any direction — fine for washdown areas or outdoor installations under cover, but not for submersion or high-pressure spray. The MTBF of 19 years is a calculated figure under controlled conditions — useful for spares planning and uptime projections, not a guaranteed lifespan.
Where it goes and how it mounts
The reader mounts via four M6 screws or a VESA 100 pattern with four M4 screws. Dimensions are 252 mm high, 193 mm wide, 52 mm deep — a compact footprint for panel or bracket mounting. The housing is aluminum and ABS (GF20) in silver/anthracite. For operation below -20 °C, a warming-up time of at least 10 minutes is required before reliable reads. Operating temperature range is -25 to +55 °C; storage and transport range is -40 to +85 °C. Shock resistance per EN 60068-2-27 and EN 60068-2-6, with shock acceleration rated at 500 m/s² and vibrational acceleration at 200 m/s².