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Reliable power supply with
all-round protection from SITOP.
Answers for industry.
Power supply system –
the Achilles heel of any plant?
Whatever the industry or requirement, a reliable DC power supply system is the basis
for any production process or plant. Production processes can be maintained only if a
constant power supply is available for the automation system. Often this power supply
system is the plant’s Achilles heel and can be responsible for downtimes with high
follow-up costs. Potential sources of risk can be found on both the input and output
side. As a plant operator, you need maximum supply reliability as well as all-round
protection against fluctuations in power supply quality, short voltage dips (brownouts),
longer power failures lasting up to several hours (blackouts), and fault-specific overloads of the output circuit.
The optimal solution for every scenario
Protection against …
Protection provided by …
Failure of a power supply unit
Redundant design of the power supply system
Overload in the 24-V DC circuit
Electronic protection of 24-V DC branch circuits
Power failure on the input side
Buffering of the power supply
SITOP all-round protection à la carte
Our answers to your requirements for a reliable power supply: With the aid of various
SITOP add-on modules, you can flexibly expand your power supply system to the point
of all-round protection. Keep in mind that every power supply system failure can shut
down a plant and cost you a great deal of time and money. With SITOP, these failures
are a thing of the past.
Redundancy modules
Selectivity modules
Buffer modules
DC UPS with capacitors
DC UPS with batteries
Redundant design of the
power supply system
Electronic protection
of 24-V DC load circuits
Bridging for up to
a period of seconds
Bridging for up to
a period of minutes
Bridging of power failures
for up to a period of hours
Your benefits at a glance:
Configuration with
redundancy module
Power supply
system
Redundancy
module
• Highly secure 24-V DC supply thanks to
a redundant design
Power supply
system
• Reliable supply even when one
power supply fails
• Compact redundancy modules for
power supply units up to 40 A
• 24-V DC/NEC class2 redundancy module
limited to 100 W
• Diagnostics signals via LEDs and
signaling contacts
24-V DC
Redundancy modules for
twice the system availability
SITOP redundancy modules provide additional protection
against failures of the 24-V DC supply. Because the two power
supplies are decoupled via a redundancy module, the remaining
power supply doesn’t feed into the failed power supply.
The redundancy module continually monitors the feeding
power supply units and when one unit fails, automatically
switches to the other. In addition, a signal is sent via a
signaling contact that can be evaluated by a controller, PC,
or control system, thereby safeguarding the 24-V DC supply.
Die SITOP Redundanzmodule im Überblick
Learn more
Internet
Sichere 24 V auch bei
Netzgeräte-Ausfall
Application
Note
• Adjustable switching threshold for
LEDs and signaling contacts
Your benefits at a glance:
Configuration with selectivity module
• Protection against overloads and
short circuits in the 24-V DC load circuits
Power
supply
Selectivity
module
PLC
HMI
Actuators
Sensors
• Safe tripping regardless of line lengths
or cross-sections
• Four load feeders per module
24-V DC
• Available in versions with tripping current
range from 0.5 to 3A and 3 to 10A
• Possibility of sequential startup of circuits
to reduce inrush current
• Diagnosis via a common signaling contact
or single-channel signal
• Evaluation via free SIMATIC S7 function
modules for modules with single-channel
signaling
Selectivity modules
to protect 24-V DC load circuits
In today’s plants, all 24-V DC loads receive power from one shared,
regulated, switched-mode power supply. To prevent faults in one load
from disabling the entire plant, the 24-V DC supply circuit is divided
into individual loads and selectively protected.
Learn more about
SIMATIC PSE200U
selectivity modules
The selectivity module monitors the current for each load circuit and
reliably prevents supply voltage failure, thus avoiding total failure of the
plant. Thanks to channel-specific signaling and evaluation by means of
SIMATIC S7 function modules, fault detection is extremely fast and
downtimes are reduced.
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The SITOP selectivity module protects individual 24-V DC load circuits against overloads
and short circuits. In the event of a fault, individual channels are reliably disconnected and
the 24-V DC supply to the unaffected channels continues with absolutely no interruption.
Die SITOP Selektivitätsmodule im Überblick
Learn more
Internet
Selektive Überwachung
von DC 24-VVerbraucherabzweigen
Application
Note
Selektivität und
schnelle Fehlerortung
in 24-V-Abzweigen
Brochures
Additional videos on the functionality
SITOP PSE200U –
short circuit in the switchgear
SITOP PSE200U –
short circuit on long lines
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simply start the film, right-click,
and choose the full screen mode.
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In the event of a short circuit, the selectivity module immediately disconnects the
defective channel and continues to provide a constant 24-V DC supply to unaffected
channels.
The selectivity module also reliably protects against short-circuit current on long
lines. Once the fault has been corrected the user can choose between individual reset
on the unit or remote reset from the upper level control system.
SITOP PSE200U –
overload in 24-V DC load circuits
SITOP PSE200U –
selective disconnection
of 24-V DC load circuits
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and choose the full screen mode.
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When an overload is detected in 24-V DC load circuits, the module prevents more
serious damage through selective fault location and disconnection.
With the selectivity module, it is always possible to manually disconnect circuits
for maintenance or commissioning. Channels that are manually disconnected can be
reactivated directly on the module.
Configuration
with buffer module
SITOP modular
power supply
Buffer
module
Buffer module
Bridging for up to
a period of seconds
24-V DC
DC UPS with capacitors
DC UPS with batteries
Bridging for up to
a period of minutes
Bridging for up to
a period of hours
Always the perfect solution
for extended power failures
Although power failures usually last only seconds, they can have time
and cost-intensive consequences in sensitive production areas. Our buffer
module reliably bridges failures of up to ten seconds for SITOP modular
power supply systems.
The maintenance-free DC UPS with capacitor technology delivers a reliable
24-V DC for up to a period of minutes, while our DC UPS with battery modules supplies power for up to a period of hours. A free software tool is available for easily integrating modules into PC-based automation solutions.
Learn more about
the SITOP DC UPS
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In addition to buffering for up to a period of minutes or hours,
the most outstanding feature of our DC UPSs with capacitors
or batteries is their long service life – even at high temperatures.
Die SITOP DC-USVSysteme im Überblick
Learn more
Internet
24 V auch bei Netzausfall
Application
Note
SITOP DC-USV –
unter­brechungsfreie
Strom­versorgungen für
jeden Anwendungsfall
Brochures
Your benefits at a glance:
SITOP DC UPS configuration with capacitors
SITOP
power supply
SITOP
UPS500S
SITOP
UPS501S
• Bridges for up to a period of
minutes, depending on charging
current and DC UPS configuration
Industrial PC
• Totally maintenance-free
double-layer capacitors
• Short charging times
24-V DC unbuffered
Actuators
(e.g. motor
drives and
valves)
• No ventilation needed for
the installation location
DC UPS with capacitors for
safeguarding plant status
When a plant shutdown is unavoidable, applications such as
PC-based automation, visualization, and the archiving of
operational data are especially in need of longer bridging times.
Logging the failure, saving the plant status data, and powering
down the PC in a controlled manner may require buffering times
of up to a period of minutes.
SITOP DC UPS with highly-capacitive double-layer capacitors
store sufficient energy to shut down PC-based systems safely.
Learn more
Internet
SITOP
Selection Tool
• IP65 variant for use outside the control cabinet
HMI
Distributed peripherals
with sensors
Die SITOP DC-USVSysteme im Überblick
• Long life even at high ambient temperatures
24-V DC buffered
Signal
light
• Simple PC integration using a software tool
• USB port for PC communication
Your benefits at a glance:
SITOP DC UPS configuration with battery modules
SITOP
power supply
SITOP
DC UPS
Battery
module
PLC
Con- Switch Signal
verter
light
• Bridging for up to a period of hours,
depending on power requirements
• Uninterrupted transition from
readiness to buffering mode
24-V DC
unbuffered
• Integrated battery management
including the monitoring of operational
readiness, battery feeder, aging,
and charging status
24-V DC buffered
• Equipped with serial or USB port
Actuators
Motor with
incremental
transducer
• Simple PC integration using
a software tool
Sensors
(e.g. temperature,
proximity switch)
DC UPS with battery modules
for maximum buffering time
Applications with powerful 24-V DC loads and processes in which
plant sections must continue to be supplied with power in order
to record measurement data or maintain communication channels
all require high-capacity energy buffers.
The SITOP DC UPS with maintenance-free lead batteries offers
optimal security during long buffering times. Depending on the
power requirements, it can supply power for up to a period of
hours. The module’s sophisticated battery management system
also ensures optimal charging and the necessary buffering capability. Active battery monitoring even tests the age of the
battery, making a precautionary replacement of the battery
unnecessary.
SITOP DC UPS –
power failure buffering with
maximum buffering time
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Learn about the uninterrupted transition from DC UPS to battery mode and learn how
noncritical loads are disconnected and important loads continue to receive power.
SITOP DC-USV
mit Batteriemodulen
im Überblick
Learn more
Internet
SITOP
Selection Tool
Additional videos on the functionality
SITOP DC UPS –
time-controlled buffering
SITOP DC UPS –
comprehensive battery management
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simply start the film, right-click,
and choose the full screen mode.
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The buffering time can be individually adjusted on the DC UPS module.
Sophisticated battery management ensures maximum security
and availability during buffering.
DC UPS software tool for simple PC integration
Both the battery and capacitor versions of the DC UPS system can be
easily integrated into PC-based systems using the free software tool.
The tool supports the further processing of status messages and the
safe shutdown of the PC.
SITOP DC UPS –
simple integration of the DC UPS
into PC-based systems
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• Further processing of all UPS module signals
• Monitoring of communication from the UPS module
• Runs under Win2000, WinXP, Vista, and Windows 7
• Runs as a service (without user login) or as an application (with user login)
• OPC Server (software interface) enabling access to UPS status messages
from other programs, such as a SIMATIC WinCC visualization system or
Soft PLC WinAC
The DC UPS software tool permits easy integration
into PC-based automation solutions.
DC-USV-Software-Tool
kostenlos herunterladen
Download
here
DC UPS
software tool
You can spend a long time looking
for the right uninterruptible power supply
(DC UPS). Or find it the easy way.
A power supply unit has to meet many different requirements, and the choice of available solutions
is correspondingly large. To reduce the time it can take to find a suitable solution, we support
your planning and design process right from the start. The SITOP selection tool not only allows
you to select and compare your DC UPS, but it also lets you export your order directly to the
Siemens Industry Mall. You can retrieve all the CAD data, circuit diagram macros, and other
product information necessary for quick and easy project planning via the CAx download manager.
This is how we support your project planning and design right from the start.
SITOP
Selection Tool
CAx download
manager
SITOP selection tool:
facilitates UPS selection
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Learn more
Learn how you can use the SITOP selection tool to quickly and easily select, compare, and order your uninterruptible power supplies.
The SITOP advantages for
a reliable power supply:
All-round protection with a SITOP power supply system
Power
supply
Redundancy
module
Power
supply
DC UPS
Selectivity
module
PLC
HMI
Actuators/
Sensors
• In the event of power network faults or load fluctuations:
with their wide input voltage range and outstanding load
characteristics, SITOP power supply units meet the
highest quality standards
• I n the event of a power supply unit failure: redundant design
of the power supply system with SITOP redundancy modules
• Protection against overloads and short circuits
in the 24-V DC circuit: electronic protection of
24-V DC load circuits with SITOP selectivity modules
• I n the event of a power failure: buffering of the power supply
with SITOP DC UPS for up to a period of hours
24-V DC
24-V DC buffered
• Possibilities ranging from a customized configuration
to all-round protection
Sample applications available for free download
Sample functional solutions for typical automation tasks comprising
a description, planning guide, and tested program code are available for SITOP.
You can use them as suggestions or as a basis for your own solutions.
Download
here
Selective
protection
application
Siemens AG
Industry Sector
Industry Automation
P.O. Box 48 48
90026 NUREMBERG
GERMANY
www.siemens.com/automation
Buffering
application
Subject to changes without prior notice
© Siemens AG 2012
The information provided in this eBook contains merely
general descriptions or characteristics of performance
which in case of actual use do not always apply as described
or which may change as a result of further development
of the products. An obligation to provide the respective
characteristics shall only exist if expressly agreed in the
terms of contract.
All product designations may be trademarks or product
names of Siemens AG or supplier companies whose use
by third parties for their own purposes could violate the
rights of the owners.