Compact 1U 8kW DC System for Space Constrained Telecom Base Station

Compact 1U 8kW DC System for Space Constrained Telecom Base Station

Product Overview

The ET48150-M7E21 is a purpose-built 1U sub-rack DC power system engineered to deliver up to 8kW of reliable -48V DC power without consuming valuable cabinet real estate. Designed specifically for fiber and microwave transmission nodes, access devices, and remote switches, this system combines high-density power conversion with comprehensive battery management, making it an ideal solution for sites where every rack unit (U) counts.

Space-Saving Architecture with Front-Access Maintenance

Traditional power shelves often require deep cabinets and rear-access for wiring and maintenance. This system disrupts that paradigm. By confining all AC input, load, and battery wiring to the front end (with signal wiring at the rear), the system supports front-only maintenance and installation.

The 1U, standard 19-inch chassis utilizes natural cooling, eliminating the need for internal fans and reducing acoustic noise and dust ingress. This compact footprint not only saves physical space but also significantly reduces installation and site leasing costs. The cabinet accommodates top-in and top-out cabling, keeping the front face clean and organized.

Power and Input Adaptability

The system is built for flexibility. It features two universal rectifier slots that are compatible with both 3,000W and 4,000W hot-swappable modules, allowing operators to scale capacity from 3kW up to 8kW as network loads evolve.

To withstand the realities of remote deployments, the rectifiers boast a wide input voltage range (85-290VAC), ensuring the system remains operational even during severe grid fluctuations or brownouts. Whether deploying the 3kW modules at >96% efficiency or the 4,000W modules at >96.6% efficiency, operators benefit from lower energy consumption and reduced heat dissipation. Both the rectifiers and the controller are fully hot-pluggable, enabling rapid online maintenance without interrupting critical site power.

Battery Management and Remote Visibility

Reliability at the edge depends on battery health. The system is equipped with a sophisticated controller featuring comprehensive battery management, including temperature-compensated charging to prolong battery lifespan.

For remote monitoring, the controller offers extensive connectivity: LAN, USB, RS485, and SNMP protocols are all supported. The system provides 8 dry-contact alarm outputs and 8 digital inputs (DI), alongside 3 analog inputs (AI) for monitoring battery and ambient temperatures. A built-in LCD display allows field technicians to quickly assess system status and diagnose issues without requiring a laptop. The system is rated for operation in harsh environments (up to 70°C) and at altitudes up to 3,000 meters, with intelligent thermal derating.

Technical Information