ERS Ruggedized Uninterruptible Power Supply

Ruggedized AVR simulated sine wave rack/tower convertible UPSs Designed to support traffic control, network servers, security CCTV & DVR, Telecom & VoIP in extreme environments

ERS Ruggedized is now a legacy product.

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The Minuteman ERS Ruggedized UPS offers automatic voltage regulation and extreme environment capability for a range of small to medium load applications.

Traffic Control
High Temperature
High Humidity

  1. Overview
  2. Features
  3. Models
  4. Accessories
  5. Software
  6. Specifications
ERS Overview

ERS Ruggedized ruggedized UPS for traffic monitoring systemsProtection For Harsh Environments

The new ERS Ruggedized UPS is a value-priced, yet feature-rich UPS incorporating line-interactive technology that preserves battery power by providing automatic voltage regulation during brownouts or voltage sags, and other fluctuations in utility power.

Designed to efficiently operate in extreme temperature rated environments, the ERS Ruggedized UPS can be used to support Traffic control and monitoring equipment, Servers, Telecom equipment, VoIP systems, Security systems, and a variety of other applications where standard UPS products are unable to operate.

A front panel LED display provides visual notification of the UPS status, including AC input status, battery status, and UPS fault indication.

Minuteman Value for Extreme Environments
Installing a UPS in a high heat or high humidity environment has traditionally meant specifying a highly expensive, specialized system. Minuteman's ERS Ruggedized puts a stop to that, with value-pricing and Minuteman reliability for extreme environments.
ERS' batteries are designed to withstand higher temperatures for better performance and extended life in high heat installs
Temperature-compensated charger regulates charger voltage based on ambient temperature for prolonged battery life

Conformal Coated Circuitry Resists Corrosion

High humidity installations can lead to corrosion and premature failure
ERS circuit boards and other internal components include conformal coating to shield humidity
See more features >>
Minuteman UPS
Ruggedized LED Display
ERS' LED display withstands high heat and humidity while keeping you informed of unit status.

1. AC Mode (Green) LED
2. On Battery (Yellow) LED
3. Bad Battery/Overload/Fault (Red) LED
4. On/Off/Test Button
Environmental Ruggedized LED Status Display
SNMP Communications
ERS Ruggedized UPSs include an SNMP-NV6 communications card pre-installed, providing the most up-to-date network monitoring and control capability standard.

Learn more about
SNMP monitoring >>

Equipped for Extreme Environments

The ERS offers an expanded temperature range suited for use in outdoor installations where standard UPSs typically will not function.

High Temperature batteries and temperature-compensated charging combine to provide an operating temperature range from +5 to +122°F (-15 to +50°C), making the ERS an economical and rugged choice for backing up equipment with extreme installation parameters.

Environmental ruggedized UPS for traffic monitoring systemsVersatile Communications

Each ERS UPS is installed with an SNMP management card for remote management and monitoring over a LAN. The UPS includes a RS232 serial port and a USB port for communications and management using a local PC/Server when partnered with Minuteman’s SentryPlus™ software, which can be downloaded for free from

Designed for versatility, the ERS can be mounted in a standard rack using the included rackmount brackets. The brackets can also be attached to the unit to allow it to stand as a tower. An optional kit is also available for mounting the unit directly on a wall.


Designed for:

  • Network/Server
  • VoIP Systems
  • IP/Analog Phone & Security
  • Traffic Control & Monitoring Devices

WARNING: This product can expose you to chemicals, including lead and lead compounds, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to:


ERS Ruggedized Features

  • LED Display - Shows UPS operating status
  • Flexible Installation Formats - the ERS can be installed in a rack or as a floor standing tower. An optional kit allows for wallmounting capability.
  • Temperature-compensated Charger - Adjusts the battery charging voltage depending on the ambient temperature at the installation site to increase the life of the internal batteries.
  • SNMP Communications - Each ERS UPS can be attached to a LAN and remotely managed using an industry-standard NMS or web browser.
  • RS232 and USB Communications - Includes RS232 serial communication port and an HID-compliant USB port (no additional software required for recognition by Windows for either port)
  • Compatible with Minuteman SentryPlus software - Provides auto-shutdown and monitoring capabilities through RS232 serial or USB connections to a local PC/Server.
  • Fax/Modem/Network Line Protection - ERS UPSs provide a low-cost means of protecting fax/modem/Ethernet lines.
  • RoHS Compliant - All ERS units are manufactured in accordance with European Union Reduction of Hazardous Substances directives (2011/65/EU) to reduce environmental impact*
  • Warranty - Each ERS UPS is covered by a 1-year parts and labor warranty and $100,000 Minuteman Platinum Protection Plan (Continental U.S. and Canada Only)

ERS1500RTNC Features

ERS Ruggedized rackmount UPS front and rear panel feature view
1 LED Status Display
2 Rack/Tower Convertible Mounts
3 USB and RS-232 Ports
4 Phone/Fax/Network Protection
5 SNMP Communications Card
6 Six (6) Battery & Surge Outlets
7 Two (2) Surge-only Outlets
8 10 ft. Input Power Cord

ERS Online Spec Sheets powered by SizeMyUPS

  • ERS1500RTNC 1500VA ruggedized rack/tower or optional wallmount UPS

Additional resources

Communications Accessories

ERS power management via SNMP Communications

Factory installed SNMP-NV6 card allows easy management of UPS without the need of a connected PC or server

Mounting Accessories

Optional mounting brackets

SentryPlus Power Manager

Get ultimate control over your power with SentryPlus

In today’s complex world of data, networks, and software, control and management of applications is vital, especially when it comes to the power that is supplied to these devices.

SentryPlus, included free with all current Minuteman UPS systems, provides users and network managers a range of monitoring & managment tools for their power, allowing total control before, during, and after power problems.

With a simple connection to the UPS via USB or RS-232, SentryPlus provides the capability to configure UPSs, monitor power, and diagnose issues, all from secure connections on the network. This eliminates wasteful runs around the facility, saving time and money.

SentryPlus Benefits

  • Windows wizard guided, easy to operate
  • Supports the Microsoft® Windows® 2000/XP hibernation feature (Windows version only)
  • Auto-Save files and graceful operating system shutdown
  • Plan a schedule to shutdown, restart, test UPS and control receptacles
  • Programmable actions(FlexAction)
  • Notification via pager, e-mail, audible alarm, network broadcast and SNMP trap
  • Real-time meters display of UPS data(voltage, frequency, loading percentage,…)
  • History data/graph and power event record for your analysis
  • Multi-computer shutdown/wakeup through TCP/IP network
  • Remote monitoring, control and configuration through TCP/IP network
  • Monitor all UPSs at a glance in a LAN
  • Supports SNMP(Simple Network Management Protocol) get, set and trap commands
  • Supports DMI(Desktop Management Interface) (Windows version only)
  • Supports HTTP, monitor by Microsoft IE or Netscape Communicator
  • Communicate to a UPS using RS-232 or Universal Serial Bus(USB)
  • Multi-lingual design(Windows version only)


View complete specifications table in the ERS Ruggedized UPS brochure (PDF)

Model Number ERS1500RTNC
Apparent Output Power 1500VA
Active Output Power 1050Watts
Power Factor 0.7
Topology Line-Interactive
Type Rackmount/Wallmount/Tower
Voltage Range 90 to 150VAC
Frequency Range 50/60Hz ±5Hz auto-sensing
Typical Transfer Time 6-10 ms (max 10 ms)
AC Leakage Current <1.0mA at full rated non-linear load
Surge Protection 1140 joules
Output: Non-battery
Voltage Range 104 to 132VAC
Frequency 50/60Hz ±5Hz.
Wave Form Sine wave
Efficiency (AC-AC) >90% at full rated non-linear load
Normal Mode Noise < 2.0Volts peak to peak at a full rated load
Common Mode Noise < 0.5Volts peak to peak at a full rated load
Output: Battery
Voltage 120VAC
Voltage Regulation 120VAC ±5% until low battery warning
Frequency ±0.5Hz unless synchronized to line
Wave Form Stepped sine wave
Peak Output Voltage < 190Vpk at loads > 100Watts
Dynamic Response ±10% at 100% load change in 30 ms
Efficiency (DC-AC) >65% at full rated non-linear load
Normal Mode Noise < 2.0Volts peak to peak at a full rated load
Common Mode Noise < 2.0Volts peak to peak at a full rated load
Battery System
Hot Swappable Battery Yes
Internal Battery Yes
DC Leakage Current <30uA (±10uA) with no AC applied and the unit in the off position
Battery Type Sealed, non-spillable, maintenance-free, lead acid, High-temperature Rated
Half Load (non-linear) @ 25ºC 13 min.
Full Load (non-linear) @ 25ºC 3 min.
Operating Temperature +5 to +122°F (-15 to +50°C) at 0 to +5,000 ft. (0 to +1,500m)
Storage Temperature -4 to +140°F (-20 to +60°C) at 0 to +50,000 ft. (0 to +15,000m)
Operating/Storage Humidity 0 to 95% Non-condensing
Size - Net - LxWxH (Shipping) 15.7 x 17.3 x 3.5” / 398 x 440 x 89mm
(20.7 x 21.9 x 8.5” / 526 x 555 x 215mm)
Weight - Net (Shipping) 43.0 lbs. / 19.5 Kgs. (48.5 lbs. / 22.0 Kgs.)
Safety and Approvals cTUVus (Conforms to UL1778 4th Edition & CSA 22.2 no. 107.3-05, RoHS
EMC Verification FCC Class B, CE Certified
Warranty • Platinum Protection 1-year parts and labor; $100,000 Platinum Protection
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