U650-M 12 dBi long-range UHF RFID reader, front view of the light gray 444 mm square panel

U650-M 12 dBi Long-Range UHF RFID Reader, 0–20 m, Wiegand/RS485/TCP/IP

Q: Is 35 m a realistic read range for the U650-M?

Treat 0–20 m as the working range. The 35 m figure applies in high-power mode with a suitable tag and a clear site, and your local radio limit may not allow full power with a 12 dBi antenna. Test with your own tags before you fix the layout.

Q: Can I run the U650-M at 30 dBm?

RF power is adjustable from 0 to 30 dBm. Radio rules limit radiated power, which adds the 12 dBi antenna gain to the output power, so check your country's limit and set the reader below it. Our frequency bands guide lists the regional bands.

Q: What pole does the U650-M need?

The bracket takes poles of 40–80 mm diameter, and the installation notes are based on a 2.2 m pole. The reader weighs 2.55 kg and measures 444 × 444 × 74 mm, so size the pole and footing for wind at your site.

Q: Should I choose the U650-M or the U640-M?

Choose the U650-M for wide entrances or when the reader must sit well back from the lane (0–20 m). Choose the U640-M for a lighter, narrower 240 × 420 mm reader rated to read beyond 12 m.

The U650-M is the highest-gain reader in our integrated UHF series: a 12 dBi antenna in a 444 × 444 mm panel for wide vehicle gates, fleet depots and freight yards. It reads EPC Gen2 tags at 0–20 m (up to 35 m in high-power mode, tag and site permitting) and outputs Wiegand 26/34, RS232/RS485, USB or TCP/IP.

Frequency: 902–928 MHz or 865–868 MHz, specified at order; other bands on request
Cards / tags: ISO 18000-6C / EPC Gen2 passive UHF tags (read and write)
Interface: Wiegand, RS232, RS485, USB
Output: Wiegand 26 / 34
Read range: 0–20 m; up to 35 m in high-power mode (depends on tag and site)

Available versions

U650-MN-type: Wiegand 26/34, RS232/RS485, USB
U650-NE-type: adds TCP/IP Ethernet (Wiegand 26/34, RS232/RS485, TCP/IP, USB)

Request a quote for U650-M Order a sample Datasheet (PDF)

✓ Sample units for evaluation
✓ Output format confirmed for your software
✓ Private label & OEM options
✓ Reply within 1 business day

Why integrators choose the U650-M

12 dBi, 0–20 m working range — the longest-range reader in the series, for entrances where the reader sits well back from the lane.
RF power 0–30 dBm — adjustable in software, so you can trim the field to the lane and to local radio limits.
FHSS in the ordered band — 902–928 MHz or 865–868 MHz, with other bands on request.
Controller or software output — Wiegand 26/34, RS232/RS485 and USB on the U650-M; TCP/IP added on the U650-N.
Triggered reading — one trigger input ties each read to a loop detector or photo-beam, so parked vehicles nearby are less likely to be reported.
Large panel, pole mount — 444 × 444 × 74 mm and 2.55 kg, on a pole bracket for 40–80 mm poles.

When 12 dBi is the right choice

Pick the U650-M when the tag has to be read from far away: a wide yard gate with trucks entering at an angle, a bus or fleet depot where the reader is mounted on a building wall, or a freight entrance where the reader cannot stand next to the lane. At 0–20 m it has the longest rated range in the series.

For a single lane read at a few meters, a lower-gain model such as the U630-M is easier to confine. The reader type guide helps if you are still choosing between an integrated reader and other formats.

Keeping a 20 m reader under control

Radio rules limit radiated power (EIRP or ERP), which adds antenna gain to the output power. With a 12 dBi antenna, full 30 dBm output is likely to exceed the limit in your country, so set RF power to your local rule first; see UHF frequency bands by country. Then aim the panel along the lane, use the trigger input so the reader reports only the vehicle at the gate, and check that tags in neighboring lanes or on parked vehicles are not read.

The 35 m high-power figure is a best case that depends on the tag and an open site. Plan the layout on the 0–20 m working range and test with your own tags.

Mounting a 444 mm panel

At 444 × 444 × 74 mm and 2.55 kg, the U650-M presents a large surface to the wind. The pole bracket takes poles of 40–80 mm diameter, and the installation notes are based on a 2.2 m pole; choose a pole and footing sized for your site. The electronics box on the rear plate has two cable glands on its lower edge, and an arrow marks the top.

U650-M specifications

General
Model	U650-M (N-type) / U650-N (E-type with TCP/IP)
Product type	Long-range UHF RFID reader with integrated antenna
Frequency	902–928 MHz or 865–868 MHz, specified at order; other bands on request
Air interface	ISO 18000-6C, EPC Class 1 Gen 2
Antenna	Built-in, 12 dBi
RF output power	0–30 dBm, software adjustable
Frequency mode	FHSS (frequency hopping)

Tags & reading
Supported tags	ISO 18000-6C / EPC Gen2 passive UHF tags (read and write)
Read range	0–20 m; up to 35 m in high-power mode (depends on tag and site)
Read speed	< 6 ms average per 64-bit single-tag read
Read mode	Continuous (active) or triggered (passive), set by software
Trigger input	1
Indicator	Buzzer

Interface & output
Interfaces, U650-M	Wiegand, RS232, RS485, USB
Interfaces, U650-N	Wiegand, RS232, RS485, TCP/IP, USB
Wiegand formats	Wiegand 26 / 34
Serial / USB data	Format set in the configuration software
SDK and software	Sample code in C#, Visual C++, VB, Java and Delphi; test demo; tag read/write and issuing demo

Physical & environment
Dimensions	444 × 444 × 74 mm
Weight	2.55 kg (4.65 kg packed)
Power supply	DC 12 V, 3 A
Operating temperature	-20 °C to +65 °C
Storage temperature	-45 °C to +95 °C
Mounting	Pole bracket for 40–80 mm poles, or wall
Color	Light gray

Specifications of U650-M as supplied for the standard version. Read range depends on the card or tag, mounting surface and environment — we can test your own cards before you order.

Download the U650-M datasheet (PDF, A4)

Card, tag and system compatibility

Works with

✓ISO 18000-6C / EPC Gen2 passive UHF tags: windshield tags, hard tags for trucks and containers, cards and labels
✓Parking and access controllers with a Wiegand 26 or 34 input
✓Loop detectors or photo-beams on the trigger input
✓Yard, fleet or gate software over RS232, RS485, USB, or TCP/IP on the U650-N

Not designed for

✕Short, tightly confined read zones — the U610-M or U620-M are easier to contain
✕125 kHz or 13.56 MHz cards — see access control readers
✕Active (battery-powered) tags
✕Writing tags over Wiegand — use the SDK or demo over serial, USB or TCP/IP

Card not listed? Send us the card type or a photo and we will confirm compatibility before you buy.

Integration in 4 steps

1
Fit the pole bracket to a 40–80 mm pole and mount the panel with the top-edge arrow up, aimed along the approach rather than across the lanes.
2
Connect a DC 12 V, 3 A supply and the data link: Wiegand D0/D1 to the controller, RS485 for long runs to a PC, or Ethernet on the U650-N.
3
In the demo software, set RF power within your local radio limit, choose triggered or continuous reading and confirm the frequency band.
4
Walk the site with tagged vehicles, including neighboring lanes and parking spaces, and reduce power or re-aim until only the intended zone is read.

OEM / ODM options for U650-M

◆902–928 MHz or 865–868 MHz build; other UHF bands on request
◆N-type U650-M or E-type U650-N with TCP/IP Ethernet
◆RF power pre-set to your country's limit and read mode pre-set before shipment, on request
◆Cable length and connector on request
◆Private label on the product label and carton, on request
◆Supply with or without pole bracket and power adapter — confirmed in your quotation

How OEM/ODM projects work →

Typical applications

U650-M FAQ

Is 35 m a realistic read range for the U650-M?

Treat 0–20 m as the working range. The 35 m figure applies in high-power mode with a suitable tag and a clear site, and your local radio limit may not allow full power with a 12 dBi antenna. Test with your own tags before you fix the layout.

Can I run the U650-M at 30 dBm?