Access control reader DAHUA DHI-ASR2201D-B — 13.56 MHz, 9–15 V DC, 200 mA, 47.5×16×135 mm

Dahua DHI-ASR2201D-B is a basic access control reader operating at 13.56 MHz. It accepts 9–15 V DC power with typical consumption of 200 mA and comes in a compact housing sized 47.5 × 16 × 135 mm. The reader supports mobile-phone based access via Bluetooth using the Easy4key app: select access control, scan the QR code from SmartPSS and the app will add your access card information so your phone functions as the credential without needing a pairing procedure—tap the unlock button on the phone screen or shake the phone when it is near the reader.

Advantages

The reader combines contactless 13.56 MHz credential reading with Bluetooth-enabled mobile access for flexible authentication options. It supports OSDP for secure, standardized communication with access control systems and offers a waterproof design with visual LED indicators for status feedback. Its surface-mount form factor and low power consumption make it suitable for a variety of installations.

Suitable for

• Office and corporate door entry
• Residential building access points
• Small and medium facility access control systems
• Locations requiring standardized secure communication between reader and controller

Key specifications

• Frequency: 13.56 MHz (MIFARE compatible)
• Power supply: 9–15 V DC
• Typical current consumption: 200 mA
• Communication protocols: RS-485 (Wiegand 34/26 optional), OSDP v2.1.5 support
• Housing size: 47.5 × 16 × 135 mm
• Mounting: surface mounted installation
• Environmental: water-resistant design
• Indicators: red, blue and green LEDs

How to use

Install the reader on a flat surface and connect it to the access controller or power supply according to the system wiring requirements. For card-based use, present a compatible 13.56 MHz credential to the reader until the LED indicates a valid read. To enable mobile access, install the Easy4key app on the smartphone, choose access control, scan the QR code from SmartPSS to add the access card information, and then present the phone near the reader and press the unlock button or shake the phone to trigger access.

Recommendations

Use OSDP-enabled controllers and follow standard wiring practices to ensure secure communication. For reliable Bluetooth mobile access, keep firmware and the Easy4key app updated and position the reader away from large metal obstructions that may affect wireless performance.