The **AMK-R101E** is a specific model of an RFID (Radio Frequency Identification) Reader module, typically used in access control systems, security terminals, and automated identification systems. Below is a detailed breakdown of its electronic components and specifications. --- ### ## Technical Specifications The AMK-R101E generally operates on the 125kHz frequency (Proximity) and interfaces with a controller via standard communication protocols. | Feature | Specification | | :--- | :--- | | **Operating Frequency** | 125 kHz | | **Supported Protocols** | EM4100 / EM-Compatible Tags | | **Output Interface** | Wiegand 26-bit / 34-bit (Standard) | | **Operating Voltage** | DC 9V to 16V (Typical 12V) | | **Reading Range** | 3cm – 10cm (Depending on tag type) | | **Status Indicators** | Dual-color LED (Red/Green) & Beeper | --- ### ### Key Electronic Components The module is composed of several critical subsystems: 1. **Antenna Coil:** * A copper wire coil etched on the PCB or wound externally. It generates an electromagnetic field to power the passive RFID tag and receives the backscattered data signal from the tag. 2. **RFID IC (Base Station):** * The "brain" that modulates the carrier wave and demodulates the analog signal received from the antenna. It converts the radio waves into digital data. 3. **Microcontroller (MCU):** * Processes the raw data from the RFID IC. It formats the ID number according to the **Wiegand protocol** (timing the pulses for Data0 and Data1 lines) to ensure the host controller can understand it. 4. **Voltage Regulator:** * Typically a linear regulator (like a 78L05 or similar) that steps down the 12V input to a stable 5V for the internal logic circuits. 5. **Output Drivers:** * Transistors or buffers that drive the **Wiegand D0/D1 lines**, the **LED control line**, and the **Buzzer control line**. --- ### ### Pinout Configuration The module usually features a pigtail wire harness with the following standard color codes: | Wire Color | Function | Description | | :--- | :--- | :--- | | **Red** | VCC | Power Supply (+) | | **Black** | GND | Ground (-) | | **Green** | D0 | Wiegand Data 0 | | **White** | D1 | Wiegand Data 1 | | **Blue** | LED | External LED Control | | **Yellow** | BEEP | External Buzzer Control | --- ### ### Operational Principles * **Inductive Coupling:** The reader emits a 125kHz signal. When a tag enters the field, the tag's internal coil picks up energy through induction to power its chip. * **Data Transmission:** The tag fluctuates the load on its coil, which the AMK-R101E detects as changes in the magnetic field. * **Wiegand Output:** Once the ID is validated, the reader pulls the Green (D0) or White (D1) wires to ground in a specific sequence to transmit the binary ID to the access control panel. ---