The Siemens SIMATIC RF260R (6GT2821-6AC40) is a compact HF RFID reader with an RS232 interface operating in ASCII/scan mode, designed for direct serial connection to PCs, operator panels, and serial terminals in production and intralogistics environments. The integrated antenna provides up to 135 mm read range, and the IP67-rated housing ensures reliable operation in harsh industrial conditions including dust, moisture, and temperature extremes.

How Does the RS232 ASCII/Scan Mode Work?

In ASCII/scan mode, the RF260R continuously scans for transponders within its read field and outputs the detected transponder data as ASCII text over the RS232 serial interface. This mode is ideal for simple identification tasks where quick, operator-initiated reads are needed — for example, at assembly stations where a worker presents a workpiece carrier tag to verify the next production step. The reader connects via an M12 connector and operates at 24 V DC (20.4–28.8 V) with 50 mA typical current draw.

What RFID Standards and Transponders Does the RF260R Support?

The RF260R operates at 13.56 MHz and supports transponders conforming to ISO 15693 and ISO 18000-3. It is compatible with the full range of Siemens SIMATIC RF200 transponders including the MDS D100, D124, D126, D139, D160, D165, D200, D324, D339, D421, D424, D425, D426, D428, D460, D524, and D528 series. Maximum RF data transfer rate is 26.5 kbit/s, with a read access time of approximately 2.4 ms per byte. The RF260R reads one transponder at a time and is not multi-tag capable.

What Are the Mechanical and Environmental Specifications?

The RF260R measures 75 × 75 × 41 mm and weighs 0.200 kg, housed in PA 6.6 polyamide (anthracite). It mounts using two M5 screws (max. 1.5 N·m torque) and can be installed directly on metal surfaces. Full IP67 protection ensures dust-tight operation and resistance to temporary water immersion. Operating temperature range is −20 °C to +70 °C, with storage/transport range of −25 °C to +80 °C. Shock resistance is 500 m/s² (EN 60721-3-7 Class 7 M2), vibration resistance 200 m/s², and MTBF is 480 years. A 3-color LED indicates operating status, transponder presence, and error conditions.

Frequently Asked Questions

How does the RS232 variant differ from the RS422 variant of the RF260R?

The RS232 variant (6GT2821-6AC40) uses ASCII/scan mode for direct point-to-point connection to a single serial device, typically over short cable distances (up to 15 m for RS232). The RS422 variant (6GT2821-6AC10) uses the 3964R protocol over differential signaling, enabling cable runs up to 1000 m for connection to RFID communication modules and industrial networks. Choose RS232 for simple, local terminal connections; choose RS422 for long-distance integration into automation networks.

Can this reader be connected to a PROFINET network?

Not directly. The RF260R RS232 variant connects to a PC or serial terminal via RS232. For PROFINET connectivity, use the IO-Link variant (6GT2821-6BC32) connected to an IO-Link master, or connect this reader to an RFID communication module (ASM 456, ASM 475) via the RS422 variant.