The **PDUMH20NET2LX** is a high-end, switched, 1U rackmount Power Distribution Unit (PDU) manufactured by Tripp Lite (Eaton). Below is a breakdown of its primary electronic components and systems. --- ## 1. Core Power Specifications The internal circuitry is designed to handle high-amperage input and distribute it across multiple outlets with monitoring capabilities. | Component | Specification | | :--- | :--- | | **Input Voltage** | 100V - 127V AC | | **Current Capacity** | 20A (Agency Derated to 16A continuous) | | **Input Plug** | NEMA L5-20P (Twist-lock) | | **Output Receptacles** | 8 x NEMA 5-15/20R | | **Form Factor** | 1U Horizontal Rackmount | --- ## 2. Key Electronic Subsystems ### A. Switched Power Control The "Switched" designation means each of the 8 outlets contains an individual **Electromechanical Relay**. * **Function:** Allows remote users to toggle power to specific outlets via the network interface. * **Benefit:** Enables rebooting of locked-up equipment or sequential power-up to prevent inrush current overloads. ### B. LX Platform Network Interface (The "Brain") The `LX` suffix refers to the **HTML5-based network interface card** built into the unit. * **Microprocessor:** Manages the embedded Linux-based firmware. * **Connectivity:** Features an RJ45 Ethernet port for remote management. * **Protocols:** Supports HTTP, HTTPS, PowerAlert®, SMTP, SNMPv1, SNMPv2, SNMPv3, Telnet, SSH, FTP, and DHCP. * **Local Display:** A 2-digit LED display provides real-time local monitoring of the total amperage load. ### C. Environmental & Expansion Ports The front panel contains electronic interfaces for external sensors: * **USB Port:** Supports firmware upgrades and configuration. * **ENVIROSENSE Port:** A dedicated RJ45-style port for connecting optional sensors to monitor temperature, humidity, and dry-contact closures. ### D. Circuit Protection * **Circuit Breakers:** The unit includes a 20A thermal circuit breaker to protect the internal wiring and connected equipment from overcurrent conditions. * **Filtering:** Basic EMI/RFI noise filtering is often integrated into these units to ensure clean power delivery to sensitive server components. --- ## 3. Comparison of Electronic Features | Feature | Description | | :--- | :--- | | **Metering Accuracy** | Network-grade billing-quality voltage and current monitoring (+/- 1% accuracy). | | **Auto-Probe** | The firmware can electronically ping a device; if it stops responding, the PDU automatically power-cycles the specific outlet. | | **Java-Free Interface** | The LX platform uses modern HTML5, eliminating the need for legacy Java plugins for remote access. | ---