ACR1281U-C2 Card UID Reader

ACR1281U-C2 Card UID Reader is a contactless card reader that automatically and efficiently gets the Unique Identifier number (UID) of any ISO 14443 Parts 1-4 Type A and B-compliant contactless card.

When presented with a contactless card (such as a MIFARE card), the ACR1281U-C2 retrieves the card’s UID and automatically returns it to the PC. The reader enables output of the UID directly to any editor, e.g. Notepad, MS Excel, MS Word, etc. With the UID, cardholders can be identified correctly in different applications, such as identity verification, time & attendance, and access control. ACR1281U-C2 also has an anti-collision feature that ensures only one card is accessed when multiple cards are presented simultaneously.

Because ACR1281U-C2 Card UID Reader is compliant with the Human Interface Device (HID) standard, it reduces driver installation issues during integration into PC environments. It can support most operating systems, including Microsoft® Windows, Linux and other embedded systems.

PC-Linked USB Contactless Reader
  • USB 2.0 Full Speed Interface
  • USB HID Keyboard Class
  • Contactless Card Support:
    • Read/write speed of up to 848 kbps
    • Built-in antenna for contactless tag access, with card reading distance of up to 50 mm (depending on tag type)
    • Supports ISO 14443 Part 4 Type A and B cards and MIFARE series
    • Built-in anti-collision feature (only one tag is accessed at any time)
  • USB Firmware Upgradability
Drivers for ACR1281U-C2
USB InterfaceOS Support
Android EVK  421 KB
Version 1.1.5
Android™ 3.1 and above

Manuals & Datasheets for ACR1281U-C2
Product Presentation

Product Presentation of ACR1281U-C2 Card UID Reader

Technical Specification

Technical Specification of ACR1281U-C2 Card UID Reader

Reference Manual

Reference Manual of ACR1281U-C2 Card UID Reader

Physical Characteristics
Dimensions (mm)120.5 mm (L) x 72.0 mm (W) x 20.4 mm (H)
Weight (g)140 g
USB Interface
ProtocolUSB HID Keyboard Class
Connector TypeStandard Type A
Power SourceFrom USB port
SpeedUSB Full Speed (12 Mbps)
Cable Length2.0 m, Fixed
Contactless Smart Card Interface
StandardISO 14443 A & B Parts 1-4, MIFARE®
ProtocolISO 14443-4 Compliant Card, T=CL 
MIFARE® Classic Card, T=CL
Built-in Peripherals
LED2 single-color: Red and Green
Other Features
Firmware UpgradeSupported
Certifications/ComplianceISO 14443
USB Full Speed
RoHS 2
Device Driver Operating System Support
Device Driver Operating System SupportWindows®