The **FLM-KG-R** is an Electronic Locking System (Electronic Key Cabinet or Locker Controller) typically used in smart storage solutions, fleet management, and secure asset tracking. It functions as a networked control unit that manages electronic locks, user authentication, and logging. --- ## 1. Core Electronic Components The FLM-KG-R operates using several distinct layers of circuitry to bridge software commands with physical hardware actions. | Component Category | Part / Functionality | Description | |:---|:---|:---| | **MCU (Microcontroller)** | Main Logic Unit | The "brain" that processes access requests and manages communication protocols. | | **Communication Module** | RS485 / TCP/IP | Standard interface for connecting to a host PC or server for remote management. | | **Relay Array** | Electromechanical Switches | Controls the power flow to solenoids or electronic latches. | | **Storage (EEPROM)** | Non-volatile Memory | Stores offline access logs and user ID permissions in case of network failure. | | **Power Management** | DC-DC Converter | Typically steps down 12V/24V input to 5V/3.3V for internal logic circuits. | --- ## 2. Technical Specifications Below is a typical breakdown of the electrical characteristics found in this specific series of controllers: ### Power & Connectivity * **Operating Voltage:** 12V DC (Standard). * **Standby Current:** Approximately 50mA - 100mA. * **Peak Current:** Can reach 2A+ depending on how many locks are triggered simultaneously. * **Interfaces:** * **Wiegand:** For connecting RFID/IC card readers. * **RS485:** For daisy-chaining multiple controller boards. * **GPIO:** General Purpose Input/Output for door sensors or alarm triggers. --- ## 3. How the Electronics Function The system follows a specific electronic workflow to ensure secure access: 1. **Input Trigger:** An electronic signal is received via the **Wiegand** port (from a keypad or card reader) or via the **Network** (from a management software). 2. **Authentication:** The **MCU** compares the input ID against its internal database or sends a request to the server. 3. **Actuation:** Upon approval, a **Relay** is energized, completing the circuit to an electronic strike or solenoid lock. 4. **Feedback Loop:** A **Magnetic Sensor (Hall Effect)** or mechanical switch detects if the door has physically opened/closed, sending a signal back to the MCU to log the event. --- ## 4. Maintenance and Safety Parts * **Optocouplers:** Used to isolate the sensitive MCU from high-voltage spikes caused by magnetic locks (Inductive kickback). * **Status LEDs:** Visual indicators for Power (Red), Communication (Yellow), and Relay Status (Green). * **Backup Battery Interface:** Often includes a port for a 12V lead-acid or Lithium backup battery to ensure functionality during power outages.