The **VS-KB-R** is a compact, USB-powered RS-232/RS-422 joystick controller designed by Lumens for controlling PTZ (Pan-Tilt-Zoom) cameras. Its electronics are centered around serial communication protocols and analog-to-digital conversion for tactile control. --- ### 1. Key Electronic Components & Specifications | Component | Specification / Detail | | :--- | :--- | | **Microcontroller** | Integrated logic board for processing VISCA/Pelco-D/Pelco-P commands. | | **Communication Interface** | RS-232 (Mini-DIN 8pin) and RS-422 (Phoenix connector). | | **Control Logic** | Supports up to 255 camera addresses (software-based selection). | | **Power Input** | 5V DC via USB Bus Power or External power supply. | | **Display** | Backlit LCD screen for menu navigation and status feedback. | | **Input Interface** | 3-axis joystick (Pan/Tilt/Zoom) + tactile mechanical buttons. | --- ### 2. Functional Electronic Systems #### A. The 3-Axis Joystick The core of the unit is an analog 3-axis joystick. - **Potentiometers:** These translate physical movement into variable voltage levels. - **A/D Conversion:** The internal circuitry converts these voltages into digital velocity values (0-7 for speed) sent via the serial bus. #### B. Communication Protocols The electronic architecture is designed to multiplex signals across different industry-standard protocols: - **VISCA:** The primary protocol for high-end PTZ control. - **Pelco-D / Pelco-P:** Legacy protocols for broader camera compatibility. - **Baud Rates:** Adjustable rates (2400, 4800, 9600, 19200, 38400 bps) to match the camera's receiver. #### C. Power Management The VS-KB-R is highly efficient, drawing power through a **USB-B port**. This allows it to be powered by a PC or a standard 5V wall adapter. The internal voltage regulators ensure stable signal transmission even when using long RS-422 cable runs (which can reach up to 1,200 meters). --- ### 3. Connection Pinout (RS-422) For electronic integration, the Phoenix connector (terminal block) follows this standard wiring: ```text Pin 1: TX+ (Transmit Data +) Pin 2: TX- (Transmit Data -) Pin 3: RX+ (Receive Data +) Pin 4: RX- (Receive Data -) Pin 5: GND (Ground) ``` --- ### 4. Comparison: VS-KB30 vs. VS-KB-R While both are controllers, their electronic "brains" differ significantly: | Feature | VS-KB-R (Compact) | VS-KB30 (Standard) | | :--- | :--- | :--- | | **Network (IP)** | No (Serial Only) | Yes (RJ45 / PoE) | | **Display** | LCD Segment | Full OLED/LCD | | **Power** | 5V USB | 12V DC / PoE |