The **WLS28-2X990XPWM** is a high-performance industrial LED strip light manufactured by Banner Engineering. The specific model indicates a 990mm length with Pulse Width Modulation (PWM) dimming capabilities. --- ### 1. Key Electronic Specifications The internal circuitry of the WLS28-2 series is designed for industrial environments, featuring robust power regulation and protection. | Feature | Specification | | :--- | :--- | | **Operating Voltage** | 12V DC to 30V DC | | **Current Consumption** | Approx. 2.0A at 12V / 0.8A at 30V | | **Control Signal** | PWM (Pulse Width Modulation) | | **PWM Frequency** | Up to 300 Hz recommended | | **Protection** | Reverse Polarity and Transient Voltage Support | --- ### 2. Core Electronic Components The device is comprised of several critical subsystems: #### A. LED Array * **Structure:** High-density Surface Mount (SMD) LEDs mounted on a rigid aluminum PCB for thermal management. * **Color Temperature:** Typically Cool White (approx. 6500K), though other variants exist. #### B. Constant Current Driver * To ensure uniform brightness across the entire 990mm length and across the voltage range (12-30V), the unit uses internal **switching regulators**. * Unlike cheap LED strips that use resistors, this driver maintains consistent current to the LEDs even if the input voltage fluctuates. #### C. PWM Dimming Interface * **The "PWM" Designation:** This specific model includes a fourth wire (usually white or blue depending on the cable) dedicated to a control signal. * **Mechanism:** By pulsing the voltage at high frequencies, the driver adjusts the duty cycle, effectively dimming the light from 0% to 100% without shifting the color temperature. --- ### 3. Wiring and Pinout The unit typically uses a 4-pin M12/Euro-style connector or an integral cable. | Pin/Wire Color | Function | Description | | :--- | :--- | :--- | | **Brown (1)** | +VDC | Main power supply (12-30V DC) | | **Blue (3)** | -VDC | Common Ground | | **White (2)** | PWM Input | Input for dimming signal (Active High) | | **Black (4)** | NC/Not Used | Usually not connected in PWM models | --- ### 4. Thermal & Mechanical Integration Electronics are housed in an **anodized aluminum housing** with a polycarbonate window. * **Heat Dissipation:** The aluminum housing acts as a primary heatsink for the internal LED driver and the LED chips. * **Sealing:** Rated at **IP67/IP69K**, the electronics are fully encapsulated or sealed against moisture, high-pressure washdowns, and oils.