Siemens SENTRON PAC1020 User manual

SENTRON
7KM Power Monitoring Device
PAC1020
Equipment Manual
05/2020
L1V30610008B
-01
Introduction
1
Description
2
Installation
3
Connection
4
Commissioning
5
Operation
6
Parameterizing
7
Security features
8
Service and maintenance
9
Technical data
10
Dimensional drawings
11
Appendix
A

Siemens AG
Smart Infrastructure
Electrical Products
Postfach 10 09 53
93009 Regensburg
GERMANY
Ⓟ
08/2020 Subject to change
Copyright © Siemens AG 2020.
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.

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Table of contents
1 Introduction........................................................................................................................................... 7
1.1 Components of the product ................................................................................................. 7
1.2 Latest information ............................................................................................................... 7
1.3 General safety notes ............................................................................................................ 8
1.4 Security information ............................................................................................................ 9
1.5 Open Source Software ......................................................................................................... 9
1.6 Protective mechanisms against manipulation ..................................................................... 10
1.7 Technical Support .............................................................................................................. 10
2 Description........................................................................................................................................... 11
2.1 Features ............................................................................................................................ 11
2.2 Measuring inputs............................................................................................................... 13
2.3 Energy counters................................................................................................................. 15
2.4 Digital inputs and outputs.................................................................................................. 16
2.4.1 Digital input....................................................................................................................... 16
2.4.2 Digital output .................................................................................................................... 17
2.5 RS485 interface ................................................................................................................. 18
3 Installation........................................................................................................................................... 21
3.1 Panel mounting ................................................................................................................. 23
3.1.1 Mounting dimensions ........................................................................................................ 23
3.1.2 Installation steps................................................................................................................ 23
3.2 Deinstallation .................................................................................................................... 24
4 Connection .......................................................................................................................................... 25
4.1 Safety instructions ............................................................................................................. 25
4.2 Connections ...................................................................................................................... 29
4.3 Connection examples ........................................................................................................ 30
4.4 Connecting to the RS485 bus ............................................................................................. 35
5 Commissioning .................................................................................................................................... 37
5.1 Overview........................................................................................................................... 37
5.2 Applying supply voltage..................................................................................................... 38
5.3 Parameterizing the device.................................................................................................. 38
5.3.1 Basic parameters................................................................................................................ 39
5.3.2 Additional settings............................................................................................................. 40
5.4 Applying the measuring voltage......................................................................................... 40

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5.5 Applying the measuring current......................................................................................... 41
5.6 Checking the displayed measured values............................................................................ 41
6 Operation............................................................................................................................................. 43
6.1 Device interface................................................................................................................. 43
6.1.1 Displays and operator controls ........................................................................................... 43
6.1.2 Special display elements .................................................................................................... 44
6.1.3 Menu-based navigation ..................................................................................................... 45
6.1.3.1 Measured value level ......................................................................................................... 45
6.1.3.2 Main menu level................................................................................................................ 46
6.1.3.3 Setting level ...................................................................................................................... 46
6.1.3.4 Editing level....................................................................................................................... 46
6.1.4 Control keys ...................................................................................................................... 47
7 Parameterizing .................................................................................................................................... 49
7.1 Introduction ...................................................................................................................... 49
7.2 Parameterizing via the operator interface........................................................................... 50
7.2.1 Device information ............................................................................................................ 51
7.2.2 Language .......................................................................................................................... 51
7.2.3 Basic parameters ............................................................................................................... 52
7.2.4 Integrated I/Os................................................................................................................... 54
7.2.5 MODBUS RTU communication............................................................................................ 56
7.2.6 Display .............................................................................................................................. 57
7.2.7 ENERGY COUNTER ............................................................................................................. 58
7.2.8 Advanced .......................................................................................................................... 59
7.2.8.1 Password........................................................................................................................... 59
7.2.8.2 Resetting ........................................................................................................................... 60
8 Security features ................................................................................................................................. 61
8.1 Password protection .......................................................................................................... 61
9 Service and maintenance .................................................................................................................... 63
9.1 Cleaning............................................................................................................................ 63
9.2 Firmware update ............................................................................................................... 63
9.3 Warranty ........................................................................................................................... 64
10 Technical data ..................................................................................................................................... 65
10.1 Labeling ............................................................................................................................ 73
11 Dimensional drawings......................................................................................................................... 77
A Appendix ............................................................................................................................................. 79
A.1 Modbus ............................................................................................................................. 79
A.1.1 Function codes .................................................................................................................. 79
A.1.2 Exception codes................................................................................................................. 80
A.1.3 Modbus measured variables with the function codes 0x03 and 0x04 .................................. 80
A.1.4 Structure - Digital input status and digital output status with the function codes 0x03
and 0x04........................................................................................................................... 83
A.1.5 Structure - Device diagnostics and device status with the function codes 0x03 and
0x04.................................................................................................................................. 83
A.1.6 Modbus status parameters with the function code 0x02..................................................... 84

Table of contents
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A.1.7 Modbus settings with the function codes 0x03, 0x04 and 0x10.......................................... 84
A.1.8 Modbus communication parameters with the function codes 0x03, 0x04 and 0x10............ 87
A.1.9 Modbus command parameters........................................................................................... 88
A.1.10 MODBUS standard device identification with the function code 0x2B.................................. 88
Index.................................................................................................................................................... 89

Table of contents
PAC1020
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Introduction
1
1.1 Components of the product
Scope of supply of PAC1020
The PAC1020 package includes:
•One PAC1020 power monitoring device
•A set of operating instructions for the PAC1020
Available software
•SENTRON powerconfig software
(https://support.industry.siemens.com/cs/ww/en/view/63452759)
Available accessories
•Compact bracket (7KM9900-0GA00-0AA0)
•Adapter for mounting on DIN rails, display faces towards DIN rail (7KM9900-0YA00-0AA0)
•Adapter for mounting on DIN rails, display faces forwards (7KM9900-0XA00-0AA0)
1.2 Latest information
Up-to-the-minute information
You can find further support on the Internet (http://www.siemens.de/lowvoltage/technical-
assistance).

Introduction
1.3 General safety notes
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1.3 General safety notes
General safety notes
DANGER
Hazardous voltage.
Will cause death, serious personal injury, or equipment damage.
Turn off and lock out all power supplying this equipment before working on this device.
WARNING
Impairment of protection will result from improper use.
Can cause death, serious personal injury, or equipment damage.
The device may be used only for the applications described in the catalog and the associated
technical documentation.
Note
These operating instructions do not purport to cover all details or variations in equipment, or
to provide for every possible contingency in connection with installation, operation, or
maintenance. Should additional information be desired, or should partic
ular problems arise
that are not discussed in enough detail in the operating instructions, please contact Technical
Support
(Page 10) for the information you require.
Safety-related symbols on the device
Symbol
Meaning
(1)
Danger of electric shock
(2)
General Warning Symbol
(3)
Electrical installation and maintenance by qualified personnel only

Introduction
1.4 Security information
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1.4 Security information
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 constitute one element of such a concept.
Customers are responsible for preventing unauthorized access to their plants, systems,
machines and networks. Such systems, machines and components should only be connected
to an enterprise network or the Internet if and to the extent such a connection is necessary
and only when appropriate security measures (e.g. firewalls and/or network segmentation)
are in place.
For additional information on industrial security measures that may be implemented, please
visit (https://www.siemens.com/industrialsecurity).
Siemens’ products and solutions undergo continuous development to make them more
secure. Siemens strongly recommends that product updates are applied as soon as they are
available and that the latest product versions are used. Use of product versions that are no
longer supported, and failure to apply the latest updates may increase customer's exposure to
cyber threats.
To keep up to date with all the latest product updates, subscribe to the Siemens Industrial
Security RSS Feed at (https://www.siemens.com/industrialsecurity).
1.5 Open Source Software
This product, solution or service ("Product") contains third-party software components. These
components are Open Source Software licensed under a license approved by the Open
Source Initiative (http://www.opensource.org) or similar licenses as determined by SIEMENS
("OSS") and/or commercial or freeware software components. With respect to the OSS
components, the applicable OSS license conditions prevail over any other terms and
conditions covering the Product. The OSS portions of this Product are provided royalty-free
and can be used at no charge.
If SIEMENS has combined or linked certain components of the Product with/to OSS
components licensed under the GNU LGPL version 2 or later as per the definition of the
applicable license, and if use of the corresponding object file is not unrestricted ("LGPL
Licensed Module", whereas the LGPL Licensed Module and the components that the LGPL
Licensed Module is combined with or linked to is the "Combined Product"), the following
additional rights apply, if the relevant LGPL license criteria are met: (i) you are entitled to
modify the Combined Product for your own use, including but not limited to the right to
modify the Combined Product to relink modified versions of the LGPL Licensed Module, and
(ii) you may reverse-engineer the Combined Product, but only to debug your modifications.
The modification right does not include the right to distribute such modifications and you
shall maintain in confidence any information resulting from such reverse-engineering of a
Combined Product.
Certain OSS licenses require SIEMENS to make source code available, for example, the GNU
General Public License, the GNU Lesser General Public License and the Mozilla Public License.
If such licenses are applicable and this Product is not shipped with the required source code, a

Introduction
1.6 Protective mechanisms against manipulation
PAC1020
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copy of this source code can be obtained by anyone in receipt of this information during the
period required by the applicable OSS licenses by contacting the following address:
Siemens AG
Smart Infrastructure
Electrical Products
Technical Support
Postfach 10 09 53
93009 Regensburg
Germany
You will find Technical Support under (https://support.industry.siemens.com/cs/us/en/ps).
Keyword: Open Source Request (please specify Product name and version, if applicable)
SIEMENS may charge a handling fee of up to 5 EUR to fulfil the request.
Warranty regarding further use of the Open Source Software
SIEMENS' warranty obligations are set forth in your agreement with SIEMENS. SIEMENS does
not provide any warranty or technical support for this Product or any OSS components
contained in it if they are modified or used in any manner not specified by SIEMENS. The
license conditions may contain disclaimers that apply between you and the respective
licensor. For the avoidance of doubt, SIEMENS does not make any warranty commitment on
behalf of or binding upon any third-party licensor. The Open Source Software used in the
product and the license agreements concerning this software can be found in the
Readme_OSS.
1.6 Protective mechanisms against manipulation
Note
Risk of manipulation
In order to reduce the risk of manipulation occurring on the device, it is recommended that
the
protective mechanisms available in the device are activated:
•
Password protection to protect the device against unintentional adjustment of
parameters.
For further information, please refer to chapter Parameterizing via the operator interface
(Page 50).
1.7 Technical Support
You can find further support on the Internet at:
Technical Support (https://www.siemens.com/lowvoltage/technical-support)

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Description
2
2.1 Features
Area of application
This is a power monitoring device for measuring the basic electrical variables in low-voltage
power distribution. The power monitoring device is capable of single-phase, two-phase, or
three-phase measurement and can be used in three-wire, four-wire, TN, TT, and IT systems.
The power monitoring device is designed for panel mounting. It is also possible to mount it
on a DIN rail using the DIN rail support brackets available as an option.
Thanks to its large measuring voltage range, the power monitoring device can be connected
directly in any low-voltage system up to a rated voltage UL-L of 400 V and UL-N of 230 V. It can
also be employed in conjunction with voltage transformers to take measurements in
medium- or high-voltage systems.
x / 1 A or x / 5 A current transformers can be used to measure current.
The power monitoring device has a large, graphical LC display on which all measured
variables are clearly visible. The four function keys combined with the multi-language
plaintext displays make intuitive user guidance possible. The experienced operator can also
use direct navigation for quicker selection of the desired display menu.
The power monitoring device comes with a range of useful monitoring, diagnostic and
service functions, such as active and reactive energy displays and active and reactive energy
counters.
The PAC1020 can be configured via the integral RS485 interface. Measured data can be
exported for further processing.
The PAC1020 has:
•One digital input
•One digital output
The parameters can be set either directly on the power monitoring device or via the RS485
interface using powerconfig.
Measurement
•Measurement of relevant electrical variables in an AC system
•Measurement of minimum and maximum values of all measured variables
Counters
•Energy counters measure reactive energy and active energy for import and export.

Description
2.1 Features
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Display and operator control
•LC display
•Four control keys with variable function assignment
Software support
•SENTRON powerconfig
Interfaces
•RS485 interface
•One passive digital input
•One passive digital output
Memory
•Device parameter settings are permanently stored in the internal device memory.
•Extreme values (maximum or minimum) are permanently stored in the internal device
memory.
Values can be reset via SENTRON powerconfig, Modbus command or directly on the device
via the menu.
Behavior in the case of power failure and power restore
After a power failure, the device starts back at zero with the calculation of total reactive
power and total active power.
Security
•Password protection
"Password protection" allows you to protect write access to the device settings. The
protection takes effect in case of the following actions:
–Modify parameters in device
–Reset maximum
–Reset minimum
–Reset counter
–Reset device
–Reset device to factory defaults
–Reset password
–Update firmware on device
The data can be read without any restrictions.

Description
2.2 Measuring inputs
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2.2 Measuring inputs
Current measurement
NOTICE
Alternating current measurement only
The device is not suitable for measuring DC current.
DANGER
Danger of electric shock. Will cause death, serious injury or damage to property.
The device is designed for connection to the low-voltage system via external current
transformers. Only connect the current measuring inputs to the low-voltage system via
suitable current transformers.
The power monitoring device is designed for:
•Measuring current of 1 A or 5 A for connecting standard current transformers. Each
current measuring input can take a continuous load of 10 A. Surge withstand capability is
possible for currents up to 100 A and a duration of 1 s.
Voltage measurement
NOTICE
AC voltage measurement only
The device is not suitable for measuring DC voltage.
The power monitoring device is designed for:
•Direct measurement on the system or using voltage transformers. The measuring
voltage inputs of the device measure directly via protective impedances. External voltage
transformers are required to measure higher voltages than the permissible rated input
voltages.
•Measuring voltage up to UL-N = 280 V.
Connection types
Two connection types are provided for connecting three-wire and four-wire systems.
Table 2- 1 Available connection types
Short code
Connection type
3P4W
3 phases, 4 conductors
3P3W
3 phases, 3 conductors

Description
2.2 Measuring inputs
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14 Equipment Manual, 05/2020, L1V30610008B-01
The input circuit of the device must correspond to one of the connection types listed. Select
the suitable connection type for the purpose.
Connection examples can be found in chapter Connection (Page 25).
NOTICE
The wrong system connection can cause irreparable damage to the device.
Before connecting the device, make sure that the local power supply conditions match the
specifications on the rating plate.
The short code of the connection type must be entered in the device settings on
commissioning. You can find the instructions for parameterizing the connection type in
chapter Commissioning (Page 37).
Displaying the measured variables depending on the connection type
The table below shows which measured values can be represented depending on the
connection type.
Table 2- 2 Display of measured variables depending on the connection type
Measured variable
Connection type
3P4W
3P3W
Voltage L1
✓
–
Voltage L2
✓
–
Voltage L3
✓
–
Voltage L1-L2
✓
✓
Voltage L2-L3
✓
✓
Voltage L3-L1
✓
✓
Current L1
✓
✓
Current L2
✓
✓
Current L3
✓
✓
Current N
✓
–
Active power L1
✓
–
Active power L2
✓
–
Active power L3
✓
–
Total active power
✓
✓
Reactive power L1 (Q1)
✓
–
Reactive power L2 (Q1)
✓
–
Reactive power L3 (Q1)
✓
–
Total reactive power (Q1)
✓
✓
Power factor PF L1
✓
–
Power factor PF L2
✓
–
Power factor PF L3
✓
–
Total power factor PF
✓
✓
Frequency
✓
✓
Total active energy import
✓
✓

Description
2.3 Energy counters
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Measured variable
Connection type
3P4W
3P3W
Total active energy export
✓
✓
Net total active energy
✓
✓
Total reactive energy import
✓
✓
Total reactive energy export
✓
✓
Net total reactive energy
✓
✓
The measured values specified in the table are displayed as instantaneous, minimum and
maximum values.
2.3 Energy counters
The power monitoring device features two energy counters. The counters can be
programmed independently of each other.
The following options are available:
•Active energy import
•Active energy export
•Net active energy
•Reactive energy import
•Reactive energy export
•Net reactive energy

Description
2.4 Digital inputs and outputs
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2.4 Digital inputs and outputs
The power monitoring device features:
•One passive digital input
•One passive digital output
2.4.1 Digital input
The integral digital input makes it possible to detect the status of the connected sensor.
①
External power supply
②
Input electronics
Figure 2-1 Block diagram: Digital input
Wiring
An external voltage of up to max. 30 V (typically 24 V DC) must be connected to terminal DIC.
①
External voltage
Figure 2-2 Digital input with switch and external power supply at terminal DIC

Description
2.4 Digital inputs and outputs
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2.4.2 Digital output
Functions
The following function can be assigned to the digital output:
•Switching output for remote control via the interface
The digital output is remotely controlled via the integral communication interface. The
Modbus function codes can be found in chapter Modbus (Page 79).
•Energy pulse output, programmable for active energy pulses or reactive energy pulses
The digital output issues the parameterized number of pulses per energy unit (e.g. kWh).
①
External power supply
②
Input electronics
③
Load
Figure 2-3 Block diagram: Digital output
Wiring
The digital output is passive and implemented exclusively as a switch.
Figure 2-4 Block diagram: Digital output
Implementation of the pulse function corresponds to the IEC 62053-31 standard.

Description
2.5 RS485 interface
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Pulse length, turn-off time
①
Pulse length
②
Turn-off time
Figure 2-5 Pulse length and turn-off time
•Pulse length:
Time for which the signal at the digital output is "high". The minimum pulse length is
30 ms and the maximum 500 ms.
•Turn-off time:
Time for which the signal at the digital output is "low". The turn-off time depends on the
measured energy, for example, and can be days or months.
•Minimum turn-off time:
The minimum turn-off time corresponds to the programmed pulse length. 30 ms is the
absolute minimum.
2.5 RS485 interface
RS485 interface for Modbus RTU communication
The PAC1020 is equipped with an RS485 interface for Modbus RTU communication. The
device operates as a Modbus slave.
Application
This interface permits:
•Reading out the measured values
•Reading and writing the device settings
•Use of the SENTRON powerconfig commissioning/parameterization software
•Updating the device firmware
The Modbus function codes are listed in the Appendix.
Conditions for operation
To use the interface, the device must be parameterized in accordance with the existing
Modbus infrastructure. The communication parameters can be set on the device and via the
Modbus RTU interface.