Siemens SITOP PSU8600 User manual

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SITOP power supply
Power supply system PSU8600
Manual
SITOP PSU8600 24 V DC/20 A
6EP3436
-8SB00-2AY0
SITOP PSU8600 24 V DC/40 A
6EP3437
-8SB00-2AY0
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
05.2017
A5E36758446
-3-76
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
A5E36758446-1-76
Ⓟ
05/2017 Subject to change
Copyright © Siemens AG 2017.
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.

Power supply system PSU8600
Manual, 05.2017, A5E36758446-3-76 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
●Number of outputs can be expanded using up to four expansion modules SITOP
CNX8600
●The output voltage of each output can be adjusted in the range 4 - 28 V
●Electronic overload shutdown for each output, the response threshold can be adjusted;
alternatively: electronic current limiting (constant current), current 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 SIMATIC STEP 7 and
SIMATIC STEP 7 in the TIA Portal,
S7 function blocks for integration in user programs and WinCC faceplates
●OPC UA interface for non-proprietary communication in automation systems
●Remote monitoring via the integrated web server
●Brief overload capability of 150% for 5 s/min (extra power)

Overview
Power supply system PSU8600
4Manual, 05.2017, A5E36758446-3-76
●Low width and high efficiency
●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 number
Basic device SITOP PSU8600
3AC 400 - 500 V input
24 V/20 A output
24 V /40 A output
6EP3436-8SB00-2AY0
6EP3437-8SB00-2AY0
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 PN
Article number: 6EP3436-8SB00-2CY0
Product state: 1
Firmware version: V1.2
Functional expansion with respect to the previous version (PS: 1, FW: V1.1):
–integrated OPC UA server
●Basic device SITOP PSU8600 24 V DC/40 A PN
Article number: 6EP3437-8SB00-2CY0
Product state: 1
Firmware version: V1.2
Functional expansion with respect to the previous version (PS: 1, FW: V1.1):
–integrated OPC UA server

Overview
Power supply system PSU8600
Manual, 05.2017, A5E36758446-3-76 5
●Expansion module SITOP CNX8600 4 × 5 A
Article number: 6EP4436-8XB00-0CY0
Product state: 2
Firmware version: V1.2
Functional expansion with respect to the previous version (PS: 2, FW: V1.1):
–None
●Expansion module SITOP CNX8600 4 × 10 A
Article number: 6EP4437-8XB00-0CY0
Product state: 2
Firmware version: V1.2
Functional expansion with respect to the previous version (PS: 2, FW: V1.1):
–None
●Buffer module SITOP BUF8600 100 ms/40 A
Article number: 6EP4297-8HB00-0XY0
Product state: 1
Firmware version: V1.2
Functional expansion with respect to the previous version (PS: 1, FW: V1.1):
–None
●Buffer module SITOP BUF8600 300 ms/40 A
Article number: 6EP4297-8HB10-0XY0
Product state: 1
Firmware version: V1.2
Functional expansion with respect to the previous version (PS: 1, FW: V1.1):
–None
●Buffer module SITOP BUF8600 4 s/40 A
Article number: 6EP4293-8HB00-0XY0
Product state: 1
Firmware version: V1.2
Functional expansion with respect to the previous version (PS: 1, FW: V1.1):
–None
●Buffer module SITOP BUF8600 10 s/40 A
Article number: 6EP4295-8HB00-0XY0
Product state: 1
Firmware version: V1.2
Functional expansion with respect to the previous version (PS: 1, FW: V1.1):
–None

Overview
Power supply system PSU8600
6Manual, 05.2017, A5E36758446-3-76

Power supply system PSU8600
Manual, 05.2017, A5E36758446-3-76 7
Table of contents
Overview................................................................................................................................................. 3
1 Safety instructions................................................................................................................................. 13
1.1 Safety instructions for explosive environments/zones............................................................14
1.1.1 Basic SITOP PSU8600 device ...............................................................................................14
1.1.2 Expansion modules SITOP CNX8600....................................................................................14
2 Description, device design, dimension drawing...................................................................................... 15
2.1 Description of the basic devices .............................................................................................15
2.2 Description of the expansion modules....................................................................................17
2.3 Description of the buffer modules ...........................................................................................18
2.4 Connections and terminal designations..................................................................................23
2.4.1 Basic devices ..........................................................................................................................23
2.4.2 Expansion modules.................................................................................................................25
2.4.3 Buffer modules........................................................................................................................26
2.5 Operator controls ....................................................................................................................27
2.5.1 Basic devices ..........................................................................................................................27
2.5.2 Expansion modules.................................................................................................................30
2.6 Displays ..................................................................................................................................32
2.6.1 Basic devices ..........................................................................................................................32
2.6.2 Expansion modules.................................................................................................................36
2.6.3 Buffer modules........................................................................................................................39
2.7 Signaling contact/control contact ............................................................................................41
2.7.1 Basic devices ..........................................................................................................................41
2.7.2 Buffer modules........................................................................................................................42
2.8 Block diagrams .......................................................................................................................44
2.9 Dimensions and weights.........................................................................................................46
3 Operator control at the device ............................................................................................................... 53
3.1 Setting the output voltage and response threshold value of the output current .....................55
3.1.1 Setting the output voltage .......................................................................................................55
3.1.2 Setting the response threshold value of the output current....................................................56
3.2 Switching an output on and off ...............................................................................................57
3.3 Overload shutdown and carrying out a reset ..........................................................................58
3.4 MANUAL and REMOTE operating modes..............................................................................61
3.5 Prioritization when the power fails ..........................................................................................64
3.6 ELECTRONIC SHUTDOWN and CONSTANT CURRENT operating modes........................66
3.7 Setting the on delay ................................................................................................................68
3.8 Setting the output characteristic .............................................................................................71

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Power supply system PSU8600
8Manual, 05.2017, A5E36758446-3-76
3.9 Activate the web server for the MANUAL operating mode on the module ............................ 73
3.10 Monitoring functions............................................................................................................... 75
3.10.1 Overtemperature monitoring functions .................................................................................. 75
3.10.2 Phase dissymmetry monitoring.............................................................................................. 77
3.10.3 System overload monitoring .................................................................................................. 79
3.11 Activating and deactivating buffer operation.......................................................................... 81
3.12 Restore factory settings ......................................................................................................... 82
4 Installation and maintenance................................................................................................................. 83
4.1 Connecting plug ..................................................................................................................... 83
4.2 Rail mounting ......................................................................................................................... 84
4.3 Permissible hardware configurations ..................................................................................... 86
4.4 Removal ................................................................................................................................. 87
4.5 Replacing individual components .......................................................................................... 89
4.6 System response for a modified hardware configuration....................................................... 93
4.6.1 Behavior after changing an individual component ................................................................. 94
4.6.2 Response after adding an individual component................................................................... 96
4.6.3 Response after removing an individual component............................................................... 96
5 Mounting position, mounting clearances................................................................................................ 99
5.1 Standard mounting position ................................................................................................... 99
5.2 Other mounting positions ..................................................................................................... 101
5.2.1 Basic device SITOP PSU8600 20 A .................................................................................... 101
5.2.2 Basic device SITOP PSU8600 20 A and supplementary modules...................................... 103
5.2.3 Basic device SITOP PSU8600 40 A .................................................................................... 105
5.2.4 Basic device SITOP PSU8600 40 A and supplementary modules:..................................... 107
6 Installation ...........................................................................................................................................109
6.1 Line-side connection ............................................................................................................ 109
6.2 Connection on the output side ............................................................................................. 111
6.3 Connecting the signaling contact/reset terminal .................................................................. 112
6.4 Establishing a PROFINET connection................................................................................. 114
6.5 Establishing an additional ground connection ..................................................................... 116
6.6 Connecting the control contact and signaling contacts of the buffer module ...................... 117
7 Engineering and remote access ...........................................................................................................121
7.1 General information ............................................................................................................. 121
7.2 Addressing ........................................................................................................................... 121
7.2.1 MAC address ....................................................................................................................... 121
7.3 Overview of application examples ....................................................................................... 122
7.4 SIMATIC STEP 7 in the TIA Portal ...................................................................................... 122
7.4.1 Installing the Hardware Support Package (HSP)................................................................. 122
7.4.2 Gerätestammdaten-Datei (GSD) installieren ....................................................................... 124
7.4.3 Inserting SITOP PSU8600 into a project ............................................................................. 124

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Manual, 05.2017, A5E36758446-3-76 9
7.4.4 Assigning a SITOP PSU8600 to a controller ........................................................................127
7.4.5 Assigning supplementary modules to the SITOP PSU8600 basic device............................128
7.4.6 Parameter assignment..........................................................................................................131
7.4.6.1 Parameters of the basic units and the supplementary modules...........................................131
7.4.6.2 Parameterizing the basic unit ...............................................................................................135
7.4.6.3 Parameterizing output 1........................................................................................................141
7.4.7 Loading the configuration (commissioning) ..........................................................................142
7.4.8 Diagnostics ...........................................................................................................................146
7.4.9 Firmware update ...................................................................................................................147
7.4.10 Reset to factory settings .......................................................................................................148
7.5 SIMATIC STEP 7 ..................................................................................................................149
7.5.1 Installing the generic station description file (GSD)..............................................................149
7.5.2 Inserting SITOP PSU8600 into a project ..............................................................................150
7.5.3 Assigning supplementary modules to the basic unit.............................................................153
7.5.4 Parameter assignment..........................................................................................................156
7.5.4.1 Parameterizing SITOP PSU8600 .........................................................................................156
7.5.4.2 Parameters of the basic unit and supplementary modules...................................................157
7.5.4.3 Parameterizing the basic unit ...............................................................................................159
7.5.4.4 Parameterizing output 1........................................................................................................164
7.5.5 Loading the configuration (commissioning) ..........................................................................166
7.5.6 Diagnostics ...........................................................................................................................168
7.5.7 Firmware update ...................................................................................................................168
7.5.8 Reset to factory settings .......................................................................................................169
7.6 Cyclic and acyclic data..........................................................................................................
170
7.6.1 Input and output data............................................................................................................170
7.6.1.1 Input data ..............................................................................................................................170
7.6.1.2 Output data ...........................................................................................................................172
7.6.1.3 Operating states SITOP PSU8600 .......................................................................................175
7.6.1.4 Operating states SITOP CNX8600 .......................................................................................176
7.6.1.5 Operating states SITOP BUF8600 .......................................................................................177
7.6.2 Reading and writing data sets ..............................................................................................178
7.6.2.1 Overview of reading and writing data sets............................................................................178
7.6.2.2 Data sets SITOP PSU8600 ..................................................................................................180
7.6.2.3 Data sets SITOP CNX8600 ..................................................................................................191
7.6.2.4 Data sets SITOP BUF8600...................................................................................................196
7.7 Web server............................................................................................................................199
7.7.1 Activating the web server......................................................................................................199
7.7.2 Accessing the web server.....................................................................................................202
7.7.3 The web server user interface ..............................................................................................203
7.7.4 Functions of the web server..................................................................................................204
7.7.5 Loading the configuration (commissioning) ..........................................................................206
7.7.6 Diagnostics ...........................................................................................................................206
7.7.6.1 Alarms ...................................................................................................................................206
7.7.6.2 Operating data ......................................................................................................................208
7.7.6.3 Online functions ....................................................................................................................210
7.7.7 HW configuration ..................................................................................................................213
7.7.7.1 Configuring the PROFINET interface ...................................................................................215
7.7.7.2 Web server............................................................................................................................
216
7.7.7.3 OPC UA server .....................................................................................................................217
7.7.7.4 NTP client .............................................................................................................................218
7.7.7.5 Improved PN security............................................................................................................219

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Power supply system PSU8600
10 Manual, 05.2017, A5E36758446-3-76
7.7.7.6 User administration .............................................................................................................. 220
7.7.7.7 Configuring SITOP PSU8600 .............................................................................................. 221
7.7.7.8 Loading and saving device configuration............................................................................. 229
7.8 OPC UA server .................................................................................................................... 230
7.8.1 Introduction .......................................................................................................................... 230
7.8.2 Preconditions ....................................................................................................................... 230
7.8.3 Activating the OPC UA server via the SITOP PSU8600 web server................................... 231
7.8.4 Establishing a connection to the OPC UA server of the SITOP PSU8600.......................... 232
7.8.5 Working with the OPC UA client .......................................................................................... 237
7.8.5.1 Displaying SITOP PSU8600 parameters............................................................................. 237
7.8.5.2 Changing the value of a node.............................................................................................. 238
7.8.5.3 Calling a method .................................................................................................................. 240
7.8.6 Parameters of the SITOP PSU8600 in the OPC UA client.................................................. 241
7.8.6.1 ActualBufferState ................................................................................................................. 242
7.8.6.2 ActualState........................................................................................................................... 242
7.8.6.3 ActualUpdateState ............................................................................................................... 242
7.8.6.4 Alarm.................................................................................................................................... 243
7.8.6.5 Buffering............................................................................................................................... 247
7.8.6.6 General ................................................................................................................................ 247
7.8.6.7 Hardware.............................................................................................................................. 247
7.8.6.8 Identification ......................................................................................................................... 248
7.8.6.9 Lock...................................................................................................................................... 248
7.8.6.10 MethodSet............................................................................................................................ 249
7.8.6.11 Network ................................................................................................................................ 249
7.8.6.12 NTP ...................................................................................................................................... 250
7.8.6.13 OPC UA Server.................................................................................................................... 250
7.8.6.14 Outputs................................................................................................................................. 250
7.8.6.15 ParameterSet ....................................................................................................................... 252
7.8.6.16 PN security........................................................................................................................... 252
7.8.6.17 PROFIenergy ....................................................................................................................... 252
7.8.6.18 SubDevices .......................................................................................................................... 253
7.8.6.19 User management ............................................................................................................... 260
7.8.6.20 Web server........................................................................................................................... 261
7.8.6.21 Other .................................................................................................................................... 261
7.8.7 OPC UA - performance........................................................................................................ 261
7.8.8 Recommissioning after a basic device has been replaced - or after restoring the
factory settings..................................................................................................................... 262
7.9 NTP client............................................................................................................................. 262
7.10 Parameter write behavior of the SITOP PSU8600 .............................................................. 263
7.10.1 writing data in the STOP or RUN mode via PROFINET...................................................... 263
7.10.2 Retentively saved PROFINET data sets in the RUN mode................................................. 266
7.10.3 OPC UA data sets that are always retentively saved .......................................................... 269
7.11 Identification data for PROFINET IO.................................................................................... 270
8 Troubleshooting ...................................................................................................................................271
8.1 Troubleshooting based on the LED signal sequence .......................................................... 271
8.2 PROFINET alarm list ........................................................................................................... 271
8.3 Alarm list web server............................................................................................................ 276

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Manual, 05.2017, A5E36758446-3-76 11
9 Technical data .................................................................................................................................... 285
9.1 Input data ..............................................................................................................................285
9.2 Output data ...........................................................................................................................286
9.3 Efficiency...............................................................................................................................292
9.4 Closed-loop control ...............................................................................................................293
9.5 Protection and monitoring.....................................................................................................294
9.6 MTBF ....................................................................................................................................295
9.7 Mechanical system ...............................................................................................................295
9.8 Accessories...........................................................................................................................297
9.9 Dimension drawings..............................................................................................................298
10 Safety, approvals, EMC....................................................................................................................... 299
10.1 Safety....................................................................................................................................299
10.2 Test voltages.........................................................................................................................300
10.3 Approvals ..............................................................................................................................301
10.4 EMC ......................................................................................................................................302
11 Environmental conditions .................................................................................................................... 303
12 Applications ........................................................................................................................................ 305
12.1 Protection against brief power failures..................................................................................305
12.2 Protecting against longer power failures...............................................................................306
12.3 Parallel connection to increase power rating........................................................................307
12.4 Parallel connection for redundancy ......................................................................................308
13 Environment........................................................................................................................................ 311
14 Service & support................................................................................................................................ 313

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Power supply system PSU8600
12 Manual, 05.2017, A5E36758446-3-76

Power supply system PSU8600
Manual, 05.2017, A5E36758446-3-76 13
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, systems, machines, and networks.
In order to protect plants, systems, machines and networks against cyber threats, it is
necessary to implement – and continuously maintain – a holistic, state-of-the-art industrial
security concept. Siemens’ products and solutions only form one element of such a concept.
Customer is responsible to prevent unauthorized access to its plants, systems, machines
and networks. Systems, machines and components should only be connected to the
enterprise network or the internet if and to the extent necessary and with appropriate security
measures (e.g. use of firewalls and network segmentation) in place.
Additionally, Siemens’ guidance on appropriate security measures should be taken into
account. For more information about industrial security, please visit:
http://www.siemens.com/industrialsecurity.
Siemens’ products and solutions undergo continuous development to make them more
secure. Siemens strongly recommends to apply product updates as soon as available and to
always use the latest product versions. Use of product versions that are no longer supported,
and failure to apply latest updates may increase customer’s exposure to cyber threats.
To stay informed about product updates, subscribe to the Siemens Industrial Security RSS
Feed under
http://www.siemens.com/industrialsecurity.

Safety instructions
1.1 Safety instructions for explosive environments/zones
Power supply system PSU8600
14 Manual, 05.2017, A5E36758446-3-76
1.1
Safety instructions for explosive environments/zones
The devices comply with ATEX directive 2014/34/EU; EN 60079-0; EN 60079-15.
1.1.1
Basic SITOP PSU8600 device
WARNING
OPERATE POTENTIOMETERS OR SWITCHES IN NON-HAZARDOUS AREAS ONLY!
1.1.2
Expansion modules SITOP CNX8600
WARNING
OPERATE POTENTIOMETERS OR SWITCHES IN NON-HAZARDOUS AREAS ONLY!

Power supply system PSU8600
Manual, 05.2017, A5E36758446-3-76 15
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. An electronically regulated DC voltage that can be set via a
potentiometer is available at the output of the devices. The device output is isolated, no-load
and short-circuit proof and has an electronic overload trip - or alternatively overload current
limiting (constant current), which can be set using an additional potentiometer. The device
output can be switched-on and switched-off using a button.
LEDs signal the operating state of the device as well as the output. The electronic overload
shutdown is reset using the reset input and the button of the output. Additional, special
functions of the devices can be activated using selector switches (DIP).
The device output 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. Further, an OPC UA server is integrated in the devices (Open Platform
Communications Unified Architecture). This facilitates non-proprietary communication in
automation systems.
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 units
Designation
Number of outputs
Maximum
current at the output
Article No.
Power supply
24 V DC/20 A
1
20 A
6EP3436-8SB00-2AY0
Power supply
24 V DC/40 A
1
40 A
6EP3437-8SB00-2AY0

Description, device design, dimension drawing
2.1 Description of the basic devices
Power supply system PSU8600
16 Manual, 05.2017, A5E36758446-3-76
①
AC
input
②
DC output
③
0
Volt terminal
④
Signaling contact, remote reset
⑤
Ethernet/PROFINET interface
⑥
LED displays (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 modules
⑪
Buttons of the outputs
with LED display "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
Power supply system PSU8600
Manual, 05.2017, A5E36758446-3-76 17
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 to connect to the basic device or additional supplementary modules
②
Socket to connect to additional supplementary modules
③
DC outputs
④
GND terminal for optional ground connection to the basic device
⑤
"O.K LED."
⑥
DIN rail slider
⑦
Convection
⑧
Clearance above/below
⑨
LED buttons ON/OFF/RST
⑩
Voltage potentiometer U (V)
⑪
Current potentiometer I (A)

Description, device design, dimension drawing
2.3 Description of the buffer modules
Power supply system PSU8600
18 Manual, 05.2017, A5E36758446-3-76
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
Power supply system PSU8600
Manual, 05.2017, A5E36758446-3-76 19
①
Connecting plug at the upper side of the device for plug connection to the basic device or to
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.

Description, device design, dimension drawing
2.3 Description of the buffer modules
Power supply system PSU8600
20 Manual, 05.2017, A5E36758446-3-76
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
①
Connecting plug at the upper side of the device for plug connection to the basic device or
to 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 "OK" 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.