Apartment, Multifamily & Rental Property Access Control
Apartment building access control hardware: anti-clone readers with matched fob sets, QR visitor codes, 4G controllers for rentals and UHF tags for gates.
ValenID · valenid.com · sales@valenid.com
QT-140 86 mm QR Code + RFID Access Controller, Wiegand 34 + RS485
86 × 86 mm QR code and 13.56 MHz card controller with onboard relay and Wiegand 34, RS485 and USB outputs. Reads dynamic QR codes from phones or paper.
- 86 × 86 mm faceplate matching common single-gang wall boxes; 50 mm-deep rear body
- Scans phone-screen and printed QR codes and returns 13.56 MHz card UIDs (14443A, 15693)
- Built-in lock relay (NO, COM, NC) runs a door without a separate panel
- Wiegand 34 as shipped for panel integration, with RS485 and USB as alternatives
- 648 × 488 image sensor and dual fill lights; roughly 100 ms per decode
- Credentials
- QR / barcode + 13.56 MHz cards
- Output
- Wiegand 34, RS485, USB
- Lock output
- Relay NO / COM / NC
- QR read distance
- 5–18 cm
- Power
- 12 V DC, ≤ 200 mA
- Dimensions
- 86 × 86 × 50 mm
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86 mm QR Code + RFID Access Controller, Wiegand 34 + RS485: overview
The QT-140 uses the 86 × 86 mm square footprint of a common single-gang wall box, with a 50 mm-deep rear body that holds the electronics and terminal block. It scans dynamic QR codes and reads 13.56 MHz cards, then either releases the door through its onboard relay or passes the credential to a panel as Wiegand 34. That makes it a tidy retrofit where a wall box or reader position already exists.
Inside is a 648 × 488 scan engine with a 34° × 26° field of view and dual fill lights. Phone-screen and printed codes decode in roughly 100 ms from 5 to 18 cm away, whether the code is turned or tilted by as much as ±45°, and Data Matrix, PDF417, UPC and common 1D barcodes are handled alongside QR. For cards, the 13.56 MHz reader returns UIDs from ISO/IEC 14443A types (MIFARE Classic 1K/4K, NTAG, Ultralight, DESFire EV1, CPU) and ISO/IEC 15693 cards, and phones using NFC card emulation are accepted too. The glass face carries no keypad, which keeps it simple to clean in public areas.
Integration notes
Wiring lands on a screw terminal block at the back of the rear body: power (DC +12V, GND), the RS485 pair, the Wiegand pair (34-bit as shipped), the relay's NO, COM and NC contacts, and a Config terminal for setup. Allow up to 200 mA from a 12 V DC supply, or up to 500 mA at 5 V if the unit runs from its USB lead. With a –10 to +50 °C rating and no published IP rating, treat it as an indoor or covered-entrance device. Visitor QR codes are issued by the app or platform you pair it with, so confirm availability for your region.
More features
- 12 V DC, ≤ 200 mA; –10 to +50 °C
QT-140 specifications
QR & barcode scanning
| Code sources | Phone-screen QR, printed QR, dynamic (time-limited) QR |
|---|---|
| Symbologies | QR, Data Matrix, PDF417, UPC-A/E0/E1, Code 11, Code 39, Code 93, Code 128, Codabar, Interleaved 2 of 5, Matrix 2 of 5 |
| Image sensor | 648 × 488 pixels |
| Field of view | 34° horizontal, 26° vertical |
| Reading angle | 360° rotation, ±45° tilt |
| QR read distance | 5–18 cm (depends on code, angle and ambient light) |
| Decode time | 100 ms average |
| Illumination | Dual fill lights for day and night scanning |
RF & credentials
| Frequency | 13.56 MHz, built-in antenna |
|---|---|
| Protocols | ISO/IEC 14443A, ISO/IEC 15693 |
| Card reading | UIDs of MIFARE Classic 1K/4K (S50/S70), MIFARE Ultralight, MIFARE DESFire EV1, NTAG, CPU smart cards and other ISO/IEC 14443A cards; ISO/IEC 15693 card UIDs; NFC card emulation on phones |
| Card read distance | Over 5 cm (card-dependent) |
Interfaces
| Wiegand | WG0 / WG1, 34-bit by default |
|---|---|
| RS485 | 485A / 485B |
| USB | USB to Mini-USB lead, 1500 mm |
| Lock relay | NO / COM / NC |
| Setup | Configuration interface terminal |
Electrical
| Supply voltage | 12 V DC (±5%) |
|---|---|
| Current at 12 V | ≤ 200 mA |
| Current on USB 5 V | ≤ 500 mA |
Mechanical & environment
| Dimensions | 86 × 86 × 50 mm (±0.3 mm) |
|---|---|
| Front | Tempered-glass front with scan window, no keypad |
| Operating temperature | –10 to +50 °C |
| Storage temperature | –20 to +80 °C |
| Operating humidity | 20–80% RH |
| Ingress rating | Not specified (indoor or sheltered mounting) |
Rear terminal definition
| Terminal | Function |
|---|---|
| DC +12V | Power input |
| GND | Ground |
| 485A | RS485 A |
| 485B | RS485 B |
| WG0 | Wiegand D0 |
| WG1 | Wiegand D1 |
| NO | Relay normally open |
| COM | Relay common |
| NC | Relay normally closed |
| Config | Configuration interface |
Specifications can change between production batches. Confirm the current revision with us before placing volume orders.
Ordering options
Quote the SKU that matches your frequency, interface and mounting. Not sure? Send us your controller model and we will pick the variant for you.
| SKU | Configuration | Actions |
|---|---|---|
| QT-140-M-Q | QR/barcode scanner + 13.56 MHz UID reader; relay, Wiegand 34, RS485 and USB; 86 × 86 × 50 mm. |
Where the QT-140 is used
- Replacing an old wall-box reader with QR and card access in the same position
- Residential entrances that issue visitor QR codes and keep resident cards
- Turnstile lanes where the scanner feeds Wiegand 34 to the gate controller
- Meeting rooms and staff areas opened by phone QR codes
Turnstile & Speed-Gate Readers: QR, RFID and Face
Turnstile card readers, QR scanners and face terminals for tripod, swing and speed gates, with Wiegand, RS485, RS232 or TTL output to the gate board.
QT-140 FAQ
How does it differ from the QT-130?
Both share the same scan engine, card reader and terminal set. The QT-140 is 86 × 86 × 50 mm to suit 86-type wall boxes; the QT-130 is 87 × 87 × 45 mm with a flat square frame.
Will it fit my wall box?
The faceplate is 86 × 86 mm and the rear body is 50 mm deep. Check that your box is an 86-type single-gang box with enough depth for the body and cables.
Can it feed an existing access panel?
Yes. It outputs Wiegand 34 by default on WG0/WG1, and RS485 is also available on 485A/485B.
Which cards and codes are supported?
Common barcodes and QR codes from phone screens or paper, plus 13.56 MHz card UIDs (ISO/IEC 14443A and ISO/IEC 15693). 125 kHz proximity cards are not supported.
Before you buy
Related buyer guides
Wiegand vs OSDP vs RS485: Which Reader Interface Should You Specify?
Compare Wiegand, OSDP and RS485 reader interfaces: wiring, cable limits, AES-128 Secure Channel and steps for a compatible access-control migration.
Magnetic Lock Wiring Diagrams: Maglock, Exit Button, Power Supply and Reader
Maglock wiring with dry-relay COM/NC: keypad and reader diagrams, REX signals, approved egress release paths and manufacturer-specific suppression.
Fail-Safe vs Fail-Secure Locks: How to Choose for Each Door
A fail-safe lock releases when power is cut; a fail-secure lock stays locked. Learn which to use per door, how to wire NO/NC, and what egress codes expect.
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Get pricing for the QT-140
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