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 6GT2811-6AB20-4AA0 is the 924 MHz variant for the Asia-Pacific region. Note that the RF650R's -4AA0 variant is tuned to 924 MHz (not 920 MHz like the RF680R's -4AA0) — the two models use slightly different frequency allocations in the same region. All four variants share identical hardware except for the RF front-end tuning.

Frequently Asked Questions

Can I connect the RF650R directly to a SIMATIC S7 PLC?

Not natively. The RF650R does not have a PROFINET interface. It communicates over TCP/IP using an XML protocol. If you need direct S7 integration, the RF680R is the model designed for that — it includes a PROFINET M12 port and standard TIA Portal function blocks. The RF650R can still feed tag data into a Siemens automation system through a PC-based middleware layer, but the RF680R eliminates that extra hop.

Does the IP30 rating mean I cannot use the RF650R on a factory floor?

IP30 means protection against solid objects larger than 2.5 mm — fingers, tools, wires — but no protection against water. The RF650R is suitable for indoor industrial environments that are clean and dry: control cabinets, warehouse workstations, covered conveyor lines, distribution center dock doors. If your environment has dust, humidity, or occasional washdown, the IP65-rated RF680R is the right choice.