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Compact white RFID reader with serial port and LED indicator

Jedrek

Jedrek R21 RFID RS232 13.56MHz S50 S70 80mm

SKU CH-TJMT-W1QV0

13.56 MHz RFID reader with RS232 serial interface reads S50 and S70 cards up to 80 mm distance

  • TypeKeyless Entry System
  • RS232 serial interface simplifies system integration
  • Reads ISO14443A S50 and S70 cards at 13.56MHz
  • 80mm read range suits access control installations
  • 9600 bps communication ensures reliable data transfer
  • Red and green LED status simplifies field diagnostics

Jedrek R21 RS232 RFID Reader

The Jedrek R21 is a 13.56MHz RFID reader that connects via a standard RS232 serial port. It reads ISO14443A S50 and S70 cards at distances up to 80mm. The unit is designed for integration into access control, parking management and identification systems.

Suits system integrators needing a simple serial

Buyers who require USB, Ethernet or wireless connectivity should look elsewhere. The reader only offers an RS232 interface and a fixed 9600 bps communication format. Projects that demand multi-protocol support or higher baud rates are not a match for this device.

RS232 serial interface at 9600 bps

Communication uses 8 data bits, no parity and 1 stop bit with an STX/ETX packet structure. This fixed serial parameter set determines whether the reader can plug straight into existing software or requires a protocol adapter.

Highlights

  • RS232 serial interface simplifies system integration
  • Reads ISO14443A S50 and S70 cards at 13.56MHz
  • 80mm read range suits access control installations
  • 9600 bps communication ensures reliable data transfer
  • Red and green LED status simplifies field diagnostics

Specifications

TypeKeyless Entry System

Questions about this item

How do I install the R21 RFID reader and which wiring step is most often missed?

Connect the DB-9 serial cable directly to the computer COM port, power the reader, and wait for the buzzer and red LED before opening the serial debugging assistant at 9600 bps, 8-N-1.

What maintenance or replacement will the R21 reader need over time?

The unit has no battery or moving parts; only the external serial cable or power adapter may need replacement if damaged.

What is the first limit reached when reading cards continuously at maximum range?

The 80 mm read distance and 9600 bps RS-232 throughput limit sustained read speed before any thermal constraint appears.

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