What it is and what it does
The Siemens 6GT2821-1BC32 is a SIMATIC RF200 series RF210R RFID reader with an integrated antenna, designed for reading and writing to ISO 15693 transponders (MDS Dxxx) over an IO-Link V1.1 interface. It operates at 13.56 MHz with a maximum read range of 20 mm (range depends on the transponder type), and communicates with an IO-Link master at up to 230 kbit/s over a maximum cable length of 20 m. Rated for 24 V DC (20.4 to 28.8 V range), it draws 0.05 A typical at 24 V, and provides a 3-color LED for local status indication.
Where it fits
Housed in an M18 x 83 mm nickel-plated brass / PBT body with IP67 protection, it is built for washdown or dusty environments on a production line — think conveyor tracking, tool identification, or pallet routing in automotive or logistics. Fastens with two M18 x 1 nuts (supplied), and connects via a standard M12 4-pin male connector — no special tooling needed to swap into an existing RFID station. Silicon-free construction suits paint-shop or coating-line installations where outgassing contaminants are a concern.
Lifecycle and sourcing reality
It is a mature, field-proven design with an MTBF of 505 a, which translates to a mean time between failures of over half a millennium in continuous operation — a reliability figure that makes it a set-and-forget component for the panel builder.
What the ratings mean for fit
The 20 mm maximum read range is the practical limit for a stationary reader over an ISO 15693 tag — enough for a part passing within a hand's width, but not for long-distance gantry applications. The actual range depends on the transponder size and orientation, so verify against your specific MDS Dxxx tag. IO-Link V1.1 means it speaks the standard point-to-point protocol for smart sensors and actuators; the master handles the cyclic data exchange (32-byte IO process data) and parameter configuration over the same 3-wire cable. Operating temperature range of -20 to +70 °C covers most indoor industrial environments; storage and transport range of -25 to +80 °C is wider, so it can sit in a non-climate-controlled warehouse without issue. Shock resistance to EN 60721-3-7 Class 7 M2 (500 m/s²) and vibration resistance at 200 m/s² means it holds up on a machine tool or a vibratory conveyor without losing alignment.