Where does the RF650R fit in the SIMATIC RF600 UHF reader family?

The RF650R is the cost-optimized entry point to the four-antenna tier of the SIMATIC RF600 UHF reader lineup. It sits below the automation-focused RF680R and the premium RF685R, targeting applications where the host system is a PC or server rather than a PLC. If your architecture runs logistics software on Windows or Linux and communicates over standard Ethernet, the RF650R delivers the same 4-port UHF coverage as the RF680R at a lower price — roughly two-thirds the cost.

Why choose RJ45 Ethernet for industrial RFID — and when does it make sense?

M12 connectors are the right call for a vibrating machine frame or a washdown zone. But in a warehouse receiving bay, a distribution center dock door, or a clean conveyor line, RJ45 is the pragmatic choice. Standard Ethernet cabling is cheaper, faster to terminate in the field, and directly compatible with the IT infrastructure that already runs logistics and WMS applications. The RF650R communicates over TCP/IP using an XML-based protocol — any PC application that can open a socket and parse XML can control the reader. No PLC programming, no TIA Portal license, no proprietary middleware. OPC UA is also available for applications that need secure, structured data access. If your environment is clean and your host is a server, the RJ45 interface of the RF650R is not a compromise — it is the simpler path to working RFID.

What mounting and installation options does the RF650R support?

The RF650R fits into nearly any physical layout. Three mounting patterns are built into the housing:

• VESA 100 — four M4 bolts on a 100 × 100 mm square pattern; brackets, arms, and wall plates are off-the-shelf items
• 35 mm DIN rail — snaps onto standard IEC top-hat rail inside a control cabinet
• S7 profile rail — compatible with SIMATIC S7-300, S7-1200, and S7-1500 mounting rails for direct integration into an existing SIMATIC rack layout

The 258 × 258 × 80 mm footprint is shared with the RF680R and RF685R, so upgrading later does not force a mechanical redesign. Note the IP30 rating — the RF650R is for indoor environments. If your installation is exposed to water jets, dust, or outdoor conditions, the IP65-rated RF680R is the appropriate alternative.

Which frequency variant do I need for my region?

UHF RFID operates in different frequency bands depending on regional radio regulations. The RF650R uses the suffix code to indicate the region:

The 6GT2811-6AB20-1AA0 is the 928 MHz variant for the FCC regulatory domain covering the United States, Canada, and Mexico. All four variants share identical hardware except for the RF front-end tuning.

Frequently Asked Questions

What kind of software do I need to operate the RF650R?

The RF650R does not require Siemens-specific software. Any application that can send and receive XML over a TCP socket can control it — this includes custom C#/Java/Python programs, logistics middleware, or WMS platforms. Siemens also provides a configuration web interface built into the reader (accessible via any browser) for commissioning, diagnostics, and firmware updates. For OPC UA access, use any OPC UA client to browse the reader's tag data and status variables.

Does the RF650R support RS422 for legacy systems?

Yes — the M12 power connector also carries an RS422 interface. This lets the RF650R connect to older conveyor controllers, barcode-scanner wiring, or serial-based automation that does not have Ethernet. Note that RS422 on the RF650R uses a point-to-point protocol; for PROFIBUS integration with SIMATIC controllers, the RF680R is a better fit.