Eaton SMART1548ET – Extreme-Temperature Hardwire Network UPS

Product Overview

The Eaton SMART1548ET is a 120VAC/48VDC extreme-temperature UPS built for industrial and traffic control networks operating in enclosures without climate control. It is purpose-built as an extreme temperature UPS for industrial networks, delivering constant battery-backed power in a hardwire 3U chassis rated to operate from -40°F to 176°F. This is not a general-purpose office UPS — it is designed for outdoor cabinets, roadside traffic signal controllers, and industrial process equipment where a standard UPS would fail from thermal stress. Integrators specifying a hardwire UPS for traffic control cabinets or industrial monitoring networks get line-interactive protection against surges, brownouts, and blackouts in a chassis engineered for harsh environments.

Product Description

The SMART1548ET is a SmartPro line-interactive UPS with hardwire AC input and output rather than plug-and-cord connections, which is standard practice for permanent installation in industrial cabinets, traffic control boxes, and outdoor network equipment enclosures. Its extended operating temperature range makes it a genuine industrial UPS extended temperature range solution for environments that see extreme summer heat or sub-freezing winter conditions, conditions that would shorten the life of a consumer-grade UPS within months. Output capacity steps down as ambient temperature rises, from 1600W in the coldest range down to 1000W at the top of its operating window, which installers should account for when sizing connected load. The unit includes six sets of output dry contacts and an input dry contact set for interfacing with remote sensors, alarms, or building automation systems common in traffic and industrial control networks. A dedicated 48VDC temperature-controlled fan power outlet supports auxiliary cooling equipment inside the enclosure. This UPS is intended for hardwire installation by a qualified electrician, not a plug-in desktop deployment, and its 3U form factor requires roughly 10 inches of rack depth.

Key Features

• Extreme Operating Temperature Range — rated from -40°F to 176°F (-40°C to 80°C), supporting deployment in uncontrolled outdoor and industrial enclosures.
• Hardwire AC Input/Output — connects directly into fixed wiring for permanent installation in traffic cabinets and industrial control panels.
• Line-Interactive Topology — protects against surges, spikes, overvoltage, undervoltage, and blackouts without switching delay to battery.
• Dry Contact Interfaces — six output dry contact sets plus one input dry contact set integrate with remote sensors and monitoring systems.
• 48VDC Fan Power Outlet — powers a temperature-controlled auxiliary fan to help manage enclosure heat.
• Expandable Battery Bank — supports external battery expansion up to 200Ah for extended runtime in remote installations.

Typical Applications

• Roadside traffic signal control cabinets
• Outdoor industrial process control enclosures
• Unmanned network equipment shelters in extreme climates
• Utility and municipal infrastructure monitoring systems
• Remote industrial monitoring and SCADA networks
• Highway and transportation department field equipment cabinets

Technical Specifications

Frequently Asked Questions

Is the SMART1548ET suitable for outdoor traffic control cabinets?

Yes. Its -40°F to 176°F operating range and hardwire connections are specifically designed for outdoor and industrial enclosures used in traffic signal and roadside network installations.

Does this UPS require an electrician for installation?

Yes. Because the SMART1548ET uses hardwire AC input and output rather than plug-and-cord connections, installation should be performed by a qualified electrician familiar with the site's wiring and local code requirements.

Can output capacity change based on ambient temperature?

Yes. The unit is rated at 1600W in its coldest operating range, stepping down to 1200W and 1000W as ambient temperature increases, so connected load should be sized with this derating in mind.

Can I extend runtime with an external battery bank?

Yes. The system supports external battery expansion up to 200Ah for installations that need longer backup time than the internal battery provides.

What is the warranty coverage on this unit?

The SMART1548ET carries a 2-year warranty that extends to 3 years with product registration.

Can this UPS integrate with remote monitoring or alarm systems?

Yes. It includes six sets of output dry contacts and an input dry contact set for interfacing with remote sensors, alarms, or building/industrial automation systems.

Who should I contact for help sizing this UPS for my installation?

Contact Creation Networks directly for guidance matching connected load, ambient temperature, and required runtime to the correct SMART1548ET configuration.