Product Overview

The RDM6300 125kHz RFID reader module is a compact solution designed to read data from 125kHz compatible read only or read/write tags. It is ideal for applications such as office/home security, personal identification, access control, anti counterfeiting, interactive toys, and industrial automation systems.

Key Features

• Supports external antenna for extended range.
• Maximum effective reading distance up to 150 mm.
• Fast decoding time (< 100ms).
• Simple UART (TTL level) interface.
• Compatible with EM4100 series read only and read/write tags.
• Compact and lightweight design.
• Green PCB with red indicator LED.
• Works with Arduino and other microcontroller platforms.
• Supports easy daisy chaining and system integration.

Technical Specifications

• Operating Voltage: 5 V DC
• Operating Current: <50mA
• Frequency: 125kHz
• Baud Rate: 9600bps
• Interface: TTLlevel UART (RS232 format)
• Reading Range: 20–50 mm (dependent on antenna and tag)
• Compatible Tags: EM4100 series 125 kHz RFID cards/tags
• PCB Material: FR 4 with metal components
• Module Type: RDM6300 series RFID reader

Typical Application

The module is easy to integrate: simply connect it to an Arduino's serial port. When a compatible RFID card enters the reading field, the module transmits the card ID via UART to the microcontroller. By pairing with a relay or other output device, it can be used to build access control, attendance tracking, payment systems, and more.

Package Includes

• 1 × RDM6300 RFID reader module
• 1 × Copper antenna coil

Physical Dimensions

• Size: 1.50 in × 0.71 in × 0.43 in (3.8 cm × 1.8 cm × 1.1 cm)

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