ACS ACR122U Lector Contactless NFC

The ACR122U is a USB-powered contactless smart card reader/writer designed for reading NFC tags, RFID cards, and other ISO 14443-compliant credentials. It’s widely used in access control, payments, ticketing, and NFC development projects.

Key Features

• Broad compatibility – Works with ISO 14443 Type A & B cards, MIFARE Classic/Ultralight/DESFire, FeliCa, and NFC Forum Tags (Types 1–4).

• High-speed performance – Card communication speed up to 424 kbps; USB transfer up to 12 Mbps.

• Compact and lightweight – Easy to integrate into desktop environments or kiosks.

• User feedback – Built-in bi-color LED and buzzer for visual and audio indicators.

• Power management – Automatic antenna power-off when idle to save energy.

• Anti-collision feature – Ensures that only one card is processed at a time when multiple cards are in range.

• Upgradeable firmware – Can be updated via USB to support future standards.

• Cross-platform support – Compatible with Windows, macOS, Linux, and Android (3.1+).

Technical Specifications

Typical Applications

• Contactless payment terminals

• Access control authentication

• Public transport ticketing

• Loyalty card and membership systems

• NFC tag reading/writing for marketing or development