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

**URL:** https://aio.lv/en/product--dahua-dhi-asr2101a-d--11683070
**Data updated:** 2026-01-30 13:37 (EET)
**Category:** Control Systems
**Manufacturer:** DAHUA
**Manufacturer code:** DHI-ASR2101A-D
**Warranty:** 3 Years
**Availability:** Out of stock

## Summary description

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. Compact housing measures 47.5 × 16 × 135 mm. Designed for use in door entry and access control systems, it provides reliable credential reading for user authentication in offices, buildings and facilities.

## Long description

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.
Usage 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.

## Specifications

| Feature | Value |
|---|---|
| Processor frequency | 13.56 MHz |
| Type | Basic access control reader |
| Weight | 0.2 kg |
| Operating relative humidity (H-H) | 0 - 95 |
| Operating temperature (T-T) | -30 - 60 |
| Height | 135 mm |
| LED indicators | Status |
| Width | 47.5 mm |
| Depth | 16 mm |
| Buzzer | Yes |
| Power consumption | 200 mA |
| Waterproof | Yes |
| RS-485 ports | 1 |
| DC voltage range | 9 - 15 |
| Built-in processor | Yes |
| Recommended usage | Outdoor |
| Access code reader | Yes |
| Authentication type | Password |
| Verification (1:1) time | 0.5 s |
| RFID reading distance | 30 mm |
| Identification (1:N) time | 1 s |
| Wiegand interface | Yes |
| Compliance certificates | CE |

## FAQ

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All DAHUA products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized DAHUA service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

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