The **Tripp Lite PDUMH15ATNET** is a 1.4kW Single-Phase Switched Automatic Transfer Switch (ATS) PDU. It is designed to provide power redundancy for network equipment with a single power supply. --- ## 1. Core Electronic Components & Architecture The internal electronics of the PDUMH15ATNET are divided into three primary functional blocks: ### A. Automatic Transfer Switch (ATS) Circuitry This is the "heart" of the device. It monitors the voltage and frequency of the two input power sources (Primary and Secondary). | Component | Function | | :--- | :--- | | **Solid-State Sensors** | Continuously monitor the sine wave of both input lines for "brownouts" or failures. | | **High-Speed Relays** | Mechanical/Electronic switches that flip the load between Source A and Source B in 2–7 milliseconds. | | **Microcontroller** | Logic chip that prevents "chatter" (rapid switching) and ensures the sources are in-phase before switching if possible. | ### B. Network Interface Card (LX Platform) The "NET" suffix indicates the inclusion of a built-in network interface for remote management. * **Processor:** An ARM-based CPU that runs a mini-web server and handles SNMP protocols. * **Ethernet Controller:** Provides the 10/100 Mbps RJ45 connection. * **Environmental Sensor Port:** An RJ11/RJ45 port for connecting external temperature and humidity probes. ### C. Power Distribution & Switching Unlike a basic PDU, each outlet in this unit is individually controllable. * **Individual Output Relays:** Each of the 8 NEMA 5-15R outlets has a dedicated relay to allow remote Reboot/On/Off functionality. * **Current Sensors (Ammeter):** Hall-effect sensors or shunts that measure the total amperage draw, displayed on the front-panel digital LED. --- ## 2. Technical Specifications Table | Feature | Specification | | :--- | :--- | | **Voltage Compatibility** | 100V, 120V AC | | **Frequency** | 50/60 Hz | | **Max Amperage** | 15A (Agency de-rated to 12A continuous) | | **Transfer Time** | 2–7 ms | | **Outlet Type** | 8 x NEMA 5-15R | | **Input Plugs** | 2 x NEMA 5-15P | --- ## 3. Visual Interface Elements The front panel consists of several electronic display components: 1. **Digital Load Meter:** A 2-digit LED display showing the total power consumption in Amps. 2. **Source Status LEDs:** Indicates which input source (A or B) is currently powering the load. 3. **Outlet Status LEDs:** Small LEDs next to each outlet indicating if that specific port is energized. --- ## 4. Operational Logic (Firmware) The internal firmware is programmed with specific electronic thresholds: * **Switching Trigger:** If the primary source drops below ~85V-95V, the ATS triggers the transfer to the secondary source. * **Power Sequencing:** The electronics allow users to program "power-on delays" for each outlet to prevent in-rush current spikes when the PDU starts up.