Brochure

18
www.solahd.com
e SDU DIN Rail DC UPS is an advanced 24 Vdc
uninterruptible power supply that oers rugged and compact
housing, wide operational temperature range and unique
installation options. With an input voltage range of 22.5 to
30.0 Vdc, the DC UPS is the ideal back-up power solution
for your critical connected loads.
e SDU DC UPS provides higher conversion eciencies
by reducing the number of times power is converted from
AC to DC and back. ese eciencies enable maximum
system up-time exibility and optimized reliability assurance.
Features
• Modular, rugged industrial-grade design
• Microprocessor based controls
• Automatic self-test feature for UPS function and
battery management check
• Wide power module operation temperature range
from -20 to +50°C
• Flexible batteries back-up expansion capabilities
• Overload protection in normal and battery modes
• User replaceable batteries
• IP-20 rated input and output screw terminals
• No internal fan, no extra cooling required
Applications
• Industrial/machine control
• Computer-based control systems
• Conveying equipment
• Material handling and packaging machines
• Semiconductor fabrication equipment
• DeviceNet™
• Amusement park equipment
• Pharmaceutical applications
• Control rooms
Related Products
• SDN-P Series
• SDN-C Series
• STV 25K Series
SDU SERIES, DIRECT CURRENT UNINTERRUPTIBLE POWER SUPPLY (DC UPS)
Why use a DC UPS?
AC UPS products have traditionally taken on battery back-
up requirements for industrial applications. Why did SolaHD
develop the DC UPS? What are the advantages?
Initially, AC UPS systems were designed for environmentally
controlled data centers and offices. These systems typically
require a cooling fan because of their tendency to generate
fair amounts of heat. In hot, dusty industrial environments,
the ability for the fan to cool the unit becomes challenged,
translating into lower Mean Time Between Failure. The AC UPS
generates extra heat, and consumes more energy, because the
120-volt AC power from the wall is converted three times to
charge the batteries and power the control system. AC UPS's
are also typically designed for 19" rack mounts. This makes
them large and cumbersome for shallow NEMA control panels.
The result is that many AC UPS systems are not compliant with
UL508, which is required for control panel mounting.
The SDU DC UPS was designed for manufacturing.
Our DC UPS reduces the number of times power is converted
from three times to just one time. This enables a more compact
packaging that allows the DC UPS to be DIN Rail mounted
within control panels.
SolaHD's DC UPS features DIN Rail mounting capabilities, high
MTBF, UL 508, CE and FCC compliance. Battery performance is
degraded by over and undercharging. For enhanced reliability,
we fitted our SDU-series with a microprocessor brain that
enables the unit’s power charger to maintain the 24-volt
charge needed for maximum battery life. Heat is another
enemy of battery performance. Our DC UPS enclosure was
designed to protect the battery in operating temperatures
as high as +50°C.
The SDN DC UPS also offers a host of essential operational
and diagnostic features that are required by today’s modern
production facilities:
• LED indicators of control power source and battery conditions
• Remote monitoring, diagnostics and shutoff capabilities
• Overload protection in both normal and battery modes
• Automatic self-testing of the control power source
functionality and battery condition
• Universal system monitoring relay terminals