Siemens SITOP PSU8600 User manual

PSU8600power supply systems
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SITOP Power Supplies
PSU8600power supply systems
Manual
SITOP PSU8600 24 V DC/20 A/4 x 5 A
6EP3436
-8MB00-2CY0
SITOP PSU8600 24 V DC/40 A/4 x 10 A
6EP3437
-8MB00-2CY0
SITOP CNX8600 4 x 5 A
6EP4436
-8XB00-0CY0
SITOP CNX8600 4 x 10 A
6EP4437
-8XB00-0CY0
SITOP BUF8600 100 ms/40 A
6EP4297
-8HB00-0XY0
SITOP BUF8600 300 ms/40 A
6EP4297
-8HB10-0XY0
SITOP BUF8600 4 s/40 A
6EP4293
-8HB00-0XY0
SITOP BUF8600 10 s/40 A
6EP4295
-8HB00-0XY0
04.2016
A5E35883207
-7-76
Overview
Safety instructions
1
Description, device design,
dimension drawing
2
Operator control at the
device
3
Installation and maintenance
4
Mounting position, mounting
clearances
5
Installation
6
Engineering and remote
access
7
Troubleshooting
8
Technical data
9
Safety, approvals, EMC
10
Environmental conditions
11
Applications
12
Environment
13
Service & support
14

Siemens AG
Division Process Industries and Drives
Postfach 48 48
90026 NÜRNBERG
GERMANY
A5E35883207-7-76
Ⓟ
04/2016 Subject to change
Copyright © Siemens AG 2016.
All rights reserved
Legal information
Warning notice system
This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent
damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert
symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are
graded according to the degree of danger.
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury may result if proper precautions are not taken.
CAUTION
indicates that minor personal injury can result if proper precautions are not taken.
NOTICE
indicates that property damage can result if proper precautions are not taken.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will
be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to
property damage.
Qualified Personnel
The product/system described in this documentation may be operated only by
personnel qualified
for the specific
task in accordance with the relevant documentation, in particular its warning notices and safety instructions.
Qualified personnel are those who, based on their training and experience, are capable of identifying risks and
avoiding potential hazards when working with these products/systems.
Proper use of Siemens products
Note the following:
WARNING
Siemens products may only be used for the applications described in the catalog and in the relevant technical
documentation. If products and components from other manufacturers are used, these must be recommended
or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and
maintenance are required to ensure that the products operate safely and without any problems. The permissible
ambient conditions must be complied with. The information in the relevant documentation must be observed.
Trademarks
All names identified by ® are registered trademarks of Siemens AG. The remaining trademarks in this publication
may be trademarks whose use by third parties for their own purposes could violate the rights of the owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software
described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the
information in this publication is reviewed regularly and any necessary corrections are included in subsequent
editions.

PSU8600power supply systems
Manual, 04.2016, A5E35883207-7-76 3
Overview
The SITOP PSU8600 power supply system is the high-performance, regulated technology
power supply system for automated plants and machines.
The key benefits of the product include:
●Wide-range input, which allows them to be connected to almost all 3-phase line supplies
around the world
●Four outputs integrated in the basic devices. Number of outputs can be expanded using
up to four expansion modules SITOP CNX8600
●The voltage of each output can be adjusted in the range 5 - 28 V
●Electronic overload shutdown for each output, the response threshold can be adjusted
●Integrated Ethernet/PROFINET interfaces (2 port switch)
●Diagnostics data and alarm messages available via Ethernet/PROFINET
●Outputs can be switched – controlled from a program – and parameterized via
Ethernet/PROFINET
●Completely integrated in TIA: User-friendly engineering in the TIA Portal, S7 function
blocks for integration in user programs and WinCC faceplates
●Remote monitoring via the integrated web server
●Brief overload capability of 150% for 5 s/min (extra power)
●Low width and high efficiency

Overview
PSU8600power supply systems
4Manual, 04.2016, A5E35883207-7-76
●Rail mounting and connection using plug-in terminals
●To increase the plant and system availability, can be expanded using SITOP BUF8600
buffer modules and SITOP DC-UPS modules
Ordering data
Basic devices and supplementary modules:
SITOP PSU8600 power supply systems
Type
Article No.
Basic device SITOP PSU8600
3AC 400 - 500 V input
24 V/20 A/4 × 5 A output
24 V/40 A/4 × 10 A output
6EP3436-8MB00-2CY0
6EP3437-8MB00-2CY0
Expansion modules SITOP CNX8600
4 × 5 A expansion module
4 × 10 A expansion module
6EP4436-8XB00-0CY0
6EP4437-8XB00-0CY0
Buffer modules SITOP BUF8600
100 ms/40 A buffer module
300 ms/40 A buffer module
4 s/40 A buffer module
10 s/40 A buffer module
6EP4297-8HB00-0XY0
6EP4297-8HB10-0XY0
6EP4293-8HB00-0XY0
6EP4295-8HB00-0XY0
Validity
This manual provides information on the following products:
●Basic device SITOP PSU8600 24 V DC/20 A/4 × 5 A PN
Article number: 6EP3436-8MB00-2CY0
Product state: 1
Firmware version: V1.1
First release
●Basic device SITOP PSU8600 24 V DC/40 A/4 × 10 A PN
Article number: 6EP3437-8MB00-2CY0
Product state: 2
Firmware version: V1.1
Functional expansion with respect to the previous version:
–Output voltage adjustment range 5 - 28 V
–Web server is directly enabled at the device using a DIP switch
–Up to four CNX8600 expansion modules are supported
–Buffer modules BUF8600 4 s/40 A and 10 s/40 A are supported

Overview
PSU8600power supply systems
Manual, 04.2016, A5E35883207-7-76 5
●Expansion module SITOP CNX8600 4 × 5 A
Article number: 6EP4436-8XB00-0CY0
Product state: 2
Firmware version: V1.1
Functional expansion with respect to the previous version:
–Output voltage adjustment range 5 - 28 V
●Expansion module SITOP CNX8600 4 × 10 A
Article number: 6EP4437-8XB00-0CY0
Product state: 2
Firmware version: V1.1
Functional expansion with respect to the previous version:
–Output voltage adjustment range 5 - 28 V
●Buffer module SITOP BUF8600 100 ms/40 A
Article number: 6EP4297-8HB00-0XY0
Product state: 1
Firmware version: V1.1
Functional expansion with respect to the previous version:
–Buffer operation can be activated/deactivated via a remote command
●Buffer module SITOP BUF8600 300 ms/40 A
Article number: 6EP4297-8HB10-0XY0
Product state: 1
Firmware version: V1.1
Functional expansion with respect to the previous version:
–Buffer operation can be activated/deactivated via a remote command
●Buffer module SITOP BUF8600 4 s/40 A
Article number: 6EP4293-8HB00-0XY0
Product state: 1
Firmware version: V1.1
First release
●Buffer module SITOP BUF8600 10 s/40 A
Article number: 6EP4295-8HB00-0XY0
Product state: 1
Firmware version: V1.1
First release

Overview
PSU8600power supply systems
6Manual, 04.2016, A5E35883207-7-76

PSU8600power supply systems
Manual, 04.2016, A5E35883207-7-76 7
Table of contents
Overview................................................................................................................................................. 3
1 Safety instructions................................................................................................................................. 11
2 Description, device design, dimension drawing...................................................................................... 13
2.1 Description of the basic devices .............................................................................................13
2.2 Description of the expansion modules....................................................................................15
2.3 Description of the buffer modules ...........................................................................................16
2.4 Connections and terminal designations..................................................................................21
2.4.1 Basic devices ..........................................................................................................................21
2.4.2 Expansion modules.................................................................................................................23
2.4.3 Buffer modules........................................................................................................................24
2.5 Operator controls ....................................................................................................................25
2.5.1 Basic devices ..........................................................................................................................25
2.5.2 Expansion modules.................................................................................................................27
2.6 Displays ..................................................................................................................................29
2.6.1 Basic devices ..........................................................................................................................29
2.6.2 Expansion modules.................................................................................................................33
2.6.3 Buffer modules........................................................................................................................35
2.7 Signaling contact/control contact ............................................................................................37
2.7.1 Basic devices ..........................................................................................................................37
2.7.2 Buffer modules........................................................................................................................38
2.8 Block diagrams .......................................................................................................................40
2.9 Dimensions and weights .........................................................................................................42
3 Operator control at the device ............................................................................................................... 51
3.1 Setting the output voltage and response threshold value of the output current .....................53
3.1.1 Setting the output voltage .......................................................................................................53
3.1.2 Setting the response threshold value of the output current ....................................................54
3.2 Switching-in and switching-out outputs...................................................................................55
3.3 Overload shutdown and carrying out a reset..........................................................................56
3.4 MANUAL and REMOTE operating modes..............................................................................59
3.5 Prioritization when the power fails ..........................................................................................62
3.6 ELECTRONIC SHUTDOWN and CONSTANT CURRENT operating modes........................64
3.7 Setting the on delay ................................................................................................................66
3.8 Connecting outputs of the basic unit in parallel ......................................................................69
3.9 Activating the web server on the module................................................................................72
3.10 Monitoring functions................................................................................................................74

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8Manual, 04.2016, A5E35883207-7-76
3.10.1 Overtemperature monitoring functions .................................................................................. 74
3.10.2 Phase dissymmetry monitoring.............................................................................................. 76
3.10.3 System overload monitoring .................................................................................................. 77
3.11 Activating and deactivating buffer operation.......................................................................... 80
4 Installation and maintenance................................................................................................................. 81
4.1 Connecting plug ..................................................................................................................... 81
4.2 Rail mounting ......................................................................................................................... 82
4.3 Permissible hardware configurations ..................................................................................... 84
4.4 Removal ................................................................................................................................. 85
4.5 Replacing individual components .......................................................................................... 87
4.6 System response for a modified hardware configuration....................................................... 91
4.6.1 Response after changing an individual component ............................................................... 92
4.6.2 Response after adding an individual component................................................................... 94
4.6.3 Response after removing an individual component............................................................... 94
5 Mounting position, mounting clearances................................................................................................ 97
5.1 Standard mounting position ................................................................................................... 97
5.2 Other mounting positions ....................................................................................................... 99
5.2.1 SITOP PSU8600 4 x 5 A basic device................................................................................... 99
5.2.2 SITOP PSU8600 4 x 5 A basic device and supplementary modules .................................. 101
5.2.3 SITOP PSU8600 4 x 10 A basic device............................................................................... 103
5.2.4 SITOP PSU8600 4 x 10 A basic device and supplementary modules ................................ 105
6 Installation ...........................................................................................................................................107
6.1 Line-side connection ............................................................................................................ 107
6.2 Output-side connection ........................................................................................................ 109
6.3 Connecting the signaling contact/reset terminal .................................................................. 111
6.4 Establishing a PROFINET connection................................................................................. 113
6.5 Establishing an additional ground connection ..................................................................... 114
6.6 Connecting the control contact and signaling contacts of the buffer module ...................... 115
7 Engineering and remote access ...........................................................................................................117
7.1 General information ............................................................................................................. 117
7.2 Overview of application examples ....................................................................................... 117
7.3 SIMATIC STEP 7 in the TIA Portal ...................................................................................... 118
7.3.1 Installing the Hardware Support Package (HSP)................................................................. 118
7.3.2 Geräte-Stammdaten-Datei (GSD) installieren ..................................................................... 119
7.3.3 Inserting SITOP PSU8600 into a project ............................................................................. 120
7.3.4 Assigning a SITOP PSU8600 to a controller ....................................................................... 122
7.3.5 Assigning supplementary modules to the SITOP PSU8600 basic device........................... 123
7.3.6 Parameter assignment......................................................................................................... 127
7.3.6.1 Parameters of the basic units and the supplementary modules.......................................... 127
7.3.6.2 Parameterizing the basic unit............................................................................................... 130
7.3.6.3 Parameterizing outputs ........................................................................................................ 136

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Manual, 04.2016, A5E35883207-7-76 9
7.3.7 Loading the configuration (commissioning) ..........................................................................137
7.3.8 Diagnostics ...........................................................................................................................141
7.3.9 Firmware update ...................................................................................................................142
7.3.10 Reset to factory settings .......................................................................................................143
7.4 SIMATIC STEP 7 ..................................................................................................................144
7.4.1 Installing the device data file (GSD) .....................................................................................144
7.4.2 Inserting SITOP PSU8600 into a project ..............................................................................145
7.4.3 Assigning supplementary modules to the basic unit.............................................................148
7.4.4 Parameter assignment..........................................................................................................151
7.4.4.1 Parameterizing SITOP PSU8600 .........................................................................................151
7.4.4.2 Parameters of the basic unit and supplementary modules...................................................152
7.4.4.3 Parameterizing the basic unit ...............................................................................................154
7.4.4.4 Parameterizing outputs .........................................................................................................159
7.4.5 Loading the configuration (commissioning) ..........................................................................161
7.4.6 Diagnostics ...........................................................................................................................162
7.4.7 Firmware update ...................................................................................................................163
7.4.8 Reset to factory settings .......................................................................................................163
7.5 Web server............................................................................................................................165
7.5.1 Accessing the web server.....................................................................................................165
7.5.2 The web server user interface ..............................................................................................167
7.5.3 Functions of the web server..................................................................................................168
7.5.4 Loading the configuration (commissioning) ..........................................................................170
7.5.5 Diagnostics ...........................................................................................................................170
7.5.5.1 Alarms ...................................................................................................................................
170
7.5.5.2 Operating data ......................................................................................................................172
7.5.5.3 Online functions ....................................................................................................................173
7.5.6 HW configuration ..................................................................................................................177
7.5.6.1 Configuring the PROFINET interface ...................................................................................179
7.5.6.2 Web server settings / user administration.............................................................................180
7.5.6.3 Configuring SITOP PSU8600 ...............................................................................................183
7.5.6.4 Loading and saving configurations .......................................................................................191
7.6 Cyclic and acyclic data..........................................................................................................192
7.6.1 Input and output data............................................................................................................193
7.6.1.1 Input data ..............................................................................................................................193
7.6.1.2 Output data ...........................................................................................................................195
7.6.1.3 Operating states SITOP PSU8600 .......................................................................................198
7.6.1.4 Operating states SITOP CNX8600 .......................................................................................199
7.6.1.5 Operating states SITOP BUF8600 .......................................................................................200
7.6.2 Reading and writing data sets ..............................................................................................201
7.6.2.1 Overview of reading and writing data sets............................................................................201
7.6.2.2 Data sets SITOP PSU8600 ..................................................................................................203
7.6.2.3 Data sets SITOP CNX8600 ..................................................................................................213
7.6.2.4 Data sets SITOP BUF8600...................................................................................................218
8 Troubleshooting .................................................................................................................................. 223
8.1 Troubleshooting based on the LED signal sequence ...........................................................223
8.2 PROFINET alarm list ............................................................................................................223
9 Technical data .................................................................................................................................... 227
9.1 Input data ..............................................................................................................................227

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10 Manual, 04.2016, A5E35883207-7-76
9.2 Output data .......................................................................................................................... 228
9.3 Efficiency.............................................................................................................................. 234
9.4 Closed-loop control .............................................................................................................. 235
9.5 Protection and monitoring .................................................................................................... 235
9.6 MTBF ................................................................................................................................... 236
9.7 Mechanical system .............................................................................................................. 237
9.8 Accessories.......................................................................................................................... 239
9.9 Dimension drawings............................................................................................................. 239
10 Safety, approvals, EMC .......................................................................................................................241
10.1 Safety ................................................................................................................................... 241
10.2 Test voltages........................................................................................................................ 242
10.3 Approvals ............................................................................................................................. 243
10.4 EMC ..................................................................................................................................... 244
11 Environmental conditions .....................................................................................................................245
12 Applications .........................................................................................................................................247
12.1 Protection against brief power failures................................................................................. 247
12.2 Protecting against longer power failures.............................................................................. 248
13 Environment ........................................................................................................................................249
14 Service & support.................................................................................................................................251

PSU8600power supply systems
Manual, 04.2016, A5E35883207-7-76 11
Safety instructions
1
WARNING
Correct handling of the devices
When operating electrical devices, it is inevitable that certain components will carry
dangerous voltages.
Therefore, failure to handle the units properly can result in death or serious physical injury
as well as extensive property damage.
Only appropriately qualified personnel may work on or in the vicinity of this equipment.
Perfect, safe, and reliable operation of this equipment is dependent on proper
transportation, storage, installation and mounting.
Before installation or maintenance work can begin, the system's main switch must be
switched off and measures taken to prevent it being switched on again.
If this instruction is not observed, touching live parts can result in death or serious injury.
Siemens provides products and solutions with industrial security functions that support the
secure operation of plants, solutions, machines, equipment and/or networks. They are
important components in a holistic industrial security concept. With this in mind, Siemens’
products and solutions undergo continuous development. Siemens recommends strongly
that you regularly check for product updates.
For the secure operation of Siemens products and solutions, it is necessary to take suitable
preventive action (e.g. cell protection concept) and integrate each component into a holistic,
state-of-the-art industrial security concept. Third-party products that may be in use should
also be considered. You can find more information about industrial security under:
http://www.siemens.com/industrialsecurity
To stay informed about product updates as they occur, sign up for a product-specific
newsletter. You can find additional information on this at:
http://support.automation.siemens.com.

Safety instructions
PSU8600power supply systems
12 Manual, 04.2016, A5E35883207-7-76

PSU8600power supply systems
Manual, 04.2016, A5E35883207-7-76 13
Description, device design, dimension drawing
2
2.1
Description of the basic devices
The basic devices SITOP PSU8600 are primary-clocked power supplies for connection to 3-
phase AC line supplies. Electronically regulated DC voltages are available at the outputs of
the devices. The DC voltage at each output can be individually adjusted using a
potentiometer. The device outputs are isolated, no-load and short-circuit proof and have an
electronic overload trip, which can be set for each output using an additional potentiometer.
Each of the device outputs can be individually switched-on and switched-off using a button.
LEDs signal the operating state of the devices as well as the individual outputs. The
electronic overload shutdown is reset using the reset input and the buttons of the outputs.
Additional, special functions of the devices can be activated using selector (DIP) switches.
The outputs of the devices can be controlled, operating and diagnostics data transferred and
externally visualized or processed via the two integrated industrial Ethernet/PROFINET
ports. An integrated web server allows authorized users to read and write data remotely via a
web browser.
The functionality of the basic devices can be expanded using supplementary modules. There
are expansion modules to increase the number of outputs, and buffer modules to extend the
internal device power failure buffer time.
Table 2- 1 Versions of the basic device
Designation
Number of outputs
Max. current per output
Article No.
Power supply
24 V/20 A/4 × 5 A DC
4
5 A
6EP3436-8MB00-2CY0
Power supply
24 V/40 A/4 × 10 A DC
4
10 A
6EP3437-8MB00-2CY0

Description, device design, dimension drawing
2.1 Description of the basic devices
PSU8600power supply systems
14 Manual, 04.2016, A5E35883207-7-76
①
AC input
②
DC outputs
③
0 Volt terminal
④
Signaling contact, remote reset
⑤
Ethernet/PROFINET interface
⑥
LEDs (OK, MAN, SF, RUN, P1/P2)
⑦
DIN rail slider
⑧
Convection
⑨
Clearance above/below
⑩
Socket at the upper side of the device for the plug connection to optional expansion mod-
ules
⑪
Buttons of the outputs with LEDs "ON/OFF/RST"
⑫
Voltage potentiometer
⑬
Current potentiometer
from ⑭
Selector switch, special functions

Description, device design, dimension drawing
2.2 Description of the expansion modules
PSU8600power supply systems
Manual, 04.2016, A5E35883207-7-76 15
2.2
Description of the expansion modules
Using a SITOP CNX8600 expansion module, the number of system outputs can be
increased, however, not the maximum output power of the basic device. The expansion
modules have, just like the basic device, a potentiometer for setting, and buttons to switch-
on and switch-off the relevant output. LEDs signal the operating states of the expansion
module as well as the individual outputs. A maximum of four expansion modules can be
used for each basic device. The connection to the basic device or to the adjacent module is
established using an integrated connecting plug.
Expansion module versions
Designation
Number of outputs
Max. current per output
Article No.
4 × 5 A expansion module
4
5 A
6EP4436-8XB00-0CY0
4 × 10 A expansion module 4 10 A 6EP4437-8XB00-0CY0
①
Connecting plug at the upper side of the device for the plug connection to the basic device or
additional modules
②
Socket at the upper side of the device for the plug connection to additional modules
③
DC outputs
④
Ground connection
⑤
"OK" LED display
⑥
Buttons of the outputs with LEDs "ON/OFF/RST"
⑦
Voltage, current potentiometer
⑧
DIN rail slider
⑨
Convection
⑩
Clearance above/below

Description, device design, dimension drawing
2.3 Description of the buffer modules
PSU8600power supply systems
16 Manual, 04.2016, A5E35883207-7-76
2.3
Description of the buffer modules
A buffer module SITOP BUF8600 allows the buffer time to be extended when the power
fails. An LED is used to signal the operating state of the buffer module. A maximum of two
buffer modules can be used for each basic unit. The connection to the basic unit or to the
adjacent module is established using an integrated connecting plug.
For brief power failures, the outputs of the power supply system are supplied without
interruption using the energy stored in the buffer module.
Buffer module versions
There are two BUF8600 buffer module versions available. Buffer modules with electrolytic
capacitors and buffer modules with double-layer capacitors.
Table 2- 2 BUF8600 buffer modules with electrolytic capacitors
Designation
Buffer time
Typical charge
time for a rated
input voltage of
400 V
Article No.
Buffer module
100 ms/40 A
100 ms at 40 A 20 s 6EP4297-8HB00-0XY0
Buffer module
300 ms/40 A
300 ms at 40 A 60 s 6EP4297-8HB10-0XY0

Description, device design, dimension drawing
2.3 Description of the buffer modules
PSU8600power supply systems
Manual, 04.2016, A5E35883207-7-76 17
①
Connecting plug at the upper side of the device for the plug connection to the basic unit or
additional modules.
②
Socket at the upper side of the device for the plug connection to additional modules
③
"O.K." LED
④
DIN rail slider
⑤
Convection
⑥
Clearance above/below
When the buffer module with electrolytic capacitors is completely charged (LED "O.K." lights
green) power failures of 100 ms or 300 ms can be buffered with a load current of 40 A. The
buffer time is correspondingly increased for lower load currents.
Table 2- 3 BUF8600 buffer modules with double-layer capacitors
Designation
Buffer time
Charge time for a rated
input voltage of 400 V
Article number
4 s/40 A buffer module 4 s at 40 A typ. 5 min;
max. 8 min
(when completely dis-
charged)
6EP4293-8HB00-0XY0
10 s/40 A buffer module 10 s at 40 A typ. 10 min;
max. 18 min
(when completely dis-
charged)
6EP4295-8HB00-0XY0

Description, device design, dimension drawing
2.3 Description of the buffer modules
PSU8600power supply systems
18 Manual, 04.2016, A5E35883207-7-76
①
Connecting plug at the upper side of the device for the plug connection to the basic device or
additional modules
②
Socket at the upper side of the device for the plug connection to additional modules
③
"O.K." LED
④
…
⑥
Remote ON/OFF and signaling contacts
⑦
DIN rail slider
⑧
Convection
⑨
Clearance above/below
When the buffer module with double-layer capacitors is completely charged (LED "O.K"
lights green) power failures of 4 s or 10 s can be buffered with a load current of 40 A. The
buffer time is correspondingly increased for lower load currents.

Description, device design, dimension drawing
2.3 Description of the buffer modules
PSU8600power supply systems
Manual, 04.2016, A5E35883207-7-76 19
Image 2-1 Typical buffer time as a function of the load current
Note
Restriction when using a SITOP BUF8600 4 s/40 A buffer module in a 40 A- power supply
system
When using a SITOP BUF8600 4
s/40 A buffer module in a 40 A power supply system, the
150
% overload capability for 5 s/min (Extra-Power) is
not
supported.
The buffer mode is immediately exited if, during the buffer mod
e, a system overload > 100
%
occurs.
When using a buffer module with double-layer capacitors, the following additional functions
are available:
Brief interruption of the voltage at output 1
If a PC is operated on the PSU8600 power supply system, when the power fails, then this
must be run down in plenty of time before the buffer time expires in order to avoid data being
lost. If the supply voltage returns after the shutdown has already started, the buffer mode is
exited and the power supply resumes normal operation. However, the PC is run down
completely. If the PC does not have an ON/OFF-switch, then it can only be rebooted by
switching off the power supply and switching it on again.
When using a buffer module with double-layer capacitors, the "Enable short-time interruption
at output 1" function is used to activate the brief interruption of the voltage at output 1 when
the supply voltage returns. However, the selection and parameterization is only possible
when appropriately configured (web server, STEP 7).
You can find additional information in Chapter Engineering and remote access (Page 117)
"Longlife" mode
In order to increase the service life of the buffer modules with a double-layer capacitors, this
can be operated in the "Longlife" mode with reduced buffer capacity. When the buffer

Description, device design, dimension drawing
2.3 Description of the buffer modules
PSU8600power supply systems
20 Manual, 04.2016, A5E35883207-7-76
module is completely charged (LED ""O.K." lights green) power failures of 3 s up to a
maximum of 8 s can be buffered with a load current of 40 A. However, the "Longlife" mode is
only possible when appropriately configured (web server, STEP 7).
You can find additional information in Chapter Engineering and remote access (Page 117)