Siemens Simatic S7-1500 User manual

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SIMATIC
S7-1500/ET 200MP
Digital input module
DI 16x24...125VUC HF
(6ES7521-7EH00-0AB0)
Manual
12/2016
A5E35681478
-AC
Preface
Documentation guide
1
Product overview
2
Wiring
3
Parameters/address space
4
Interrupts/diagnostic alarms
5
Technical specifications
6
Dimensional drawing
A
Parameter data records
B

Siemens AG
Division Digital Factory
Postfach 48 48
90026 NÜRNBERG
GERMANY
A5E35681478-AC
Ⓟ
12/2016 Subject to change
Copyright © Siemens AG 2015 - 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.

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Preface
Purpose of the documentation
This manual supplements the S7-1500/ET 200MP
(https://support.industry.siemens.com/cs/ww/en/view/59191792) system manual.
Functions that relate in general to the systems are described in these system manuals.
The information provided in this manual and in the system/function manuals supports you in
commissioning the systems.
Changes compared to previous version
Compared to the previous version, this manual contains the following change:
Technical specifications have been updated: Module is M/P reading.
Conventions
The term "CPU" is used in this manual both for the CPUs of the S7-1500 automation system
and for interface modules of the ET 200MP distributed I/O system.
Please also observe notes marked as follows:
Note
A note contains important information on the product described in the documentation, on the
handling of the product or on the section of the documentation to which particular attention
should be paid.

Preface
Digital input module DI 16x24...125VUC HF (6ES7521-7EH00-0AB0)
Manual, 12/2016, A5E35681478-AC 5
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 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).
Open Source Software
Open-source software is used in the firmware of the I/O modules. Open Source Software is
provided free of charge. We are liable for the product described, including the open-source
software contained in it, pursuant to the conditions applicable to the product. Siemens
accepts no liability for the use of the open source software over and above the intended
program sequence, or for any faults caused by modifications to the software.
For legal reasons, we are obliged to publish the original text of the license conditions and
copyright notices. Please read the information relating to this on the Internet
(https://support.industry.siemens.com/cs/ww/en/view/109741045).

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Table of contents
Preface ................................................................................................................................................... 4
1 Documentation guide .............................................................................................................................. 7
2 Product overview .................................................................................................................................. 11
2.1 Properties............................................................................................................................... 11
3 Wiring ................................................................................................................................................... 13
3.1 Wiring and block diagram ...................................................................................................... 13
4 Parameters/address space ................................................................................................................... 15
4.1 Parameters............................................................................................................................. 15
4.2 Declaration of parameters...................................................................................................... 16
4.3 Address space ....................................................................................................................... 17
5 Interrupts/diagnostic alarms .................................................................................................................. 21
5.1 Status and error displays ....................................................................................................... 21
5.2 Interrupts ................................................................................................................................ 23
5.3 Diagnostics alarms................................................................................................................. 25
6 Technical specifications ........................................................................................................................ 26
A Dimensional drawing............................................................................................................................. 30
A.1 Dimensional drawing.............................................................................................................. 30
B Parameter data records ........................................................................................................................ 32
B.1 Parameter assignment and structure of the parameter data records.................................... 32
B.2 Structure of the parameter data records................................................................................ 33

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Documentation guide
1
The documentation for the SIMATIC S7-1500 automation system, the CPU 1516pro-2 PN
based on SIMATIC S7-1500 and the SIMATIC ET 200MP distributed I/O system is arranged
into three areas.
This arrangement enables you to access the specific content you require.
Basic information
The System Manual and Getting Started describe in detail the configuration, installation,
wiring and commissioning of the SIMATIC S7-1500 and ET 200MP systems. For
CPU 1516pro-2 PN you use the corresponding operating instructions. The STEP 7 online
help supports you in the configuration and programming.
Device information
Product manuals contain a compact description of the module-specific information, such as
properties, wiring diagrams, characteristics and technical specifications.

Documentation guide
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8Manual, 12/2016, A5E35681478-AC
General information
The function manuals contain detailed descriptions on general topics regarding the SIMATIC
S7-1500 and ET 200MP systems, e.g. diagnostics, communication, motion control, Web
server, OPC UA.
You can download the documentation free of charge from the Internet
(http://w3.siemens.com/mcms/industrial-automation-systems-simatic/en/manual-
overview/Pages/Default.aspx).
Changes and supplements to the manuals are documented in a Product Information.
You can download the product information free of charge from the Internet
(https://support.industry.siemens.com/cs/us/en/view/68052815).
Manual Collection S7-1500/ET 200MP
The Manual Collection contains the complete documentation on the SIMATIC S7-1500
automation system and the ET 200MP distributed I/O system gathered together in one file.
You can find the Manual Collection on the Internet
(https://support.industry.siemens.com/cs/ww/en/view/86140384).
SIMATIC S7-1500 comparison list for programming languages
The comparison list contains an overview of which instructions and functions you can use for
which controller families.
You can find the comparison list on the Internet
(https://support.industry.siemens.com/cs/ww/en/view/86630375).
"mySupport"
With "mySupport", your personal workspace, you make the best out of your Industry Online
Support.
In "mySupport", you can save filters, favorites and tags, request CAx data and compile your
personal library in the Documentation area. In addition, your data is already filled out in
support requests and you can get an overview of your current requests at any time.
You must register once to use the full functionality of "mySupport".
You can find "mySupport" on the Internet (https://support.industry.siemens.com/My/ww/en).
"mySupport" - Documentation
In the Documentation area in "mySupport" you can combine entire manuals or only parts of
these to your own manual.
You can export the manual as PDF file or in a format that can be edited later.
You can find "mySupport" - Documentation on the Internet
(http://support.industry.siemens.com/My/ww/en/documentation).

Documentation guide
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"mySupport" - CAx data
In the CAx data area in "mySupport", you can access the current product data for your CAx
or CAe system.
You configure your own download package with a few clicks.
In doing so you can select:
●Product images, 2D dimension drawings, 3D models, internal circuit diagrams, EPLAN
macro files
●Manuals, characteristics, operating manuals, certificates
●Product master data
You can find "mySupport" - CAx data on the Internet
(http://support.industry.siemens.com/my/ww/en/CAxOnline).
Application examples
The application examples support you with various tools and examples for solving your
automation tasks. Solutions are shown in interplay with multiple components in the system -
separated from the focus on individual products.
You will find the application examples on the Internet
(https://support.industry.siemens.com/sc/ww/en/sc/2054).
TIA Selection Tool
With the TIA Selection Tool, you can select, configure and order devices for Totally
Integrated Automation (TIA).
This tool is the successor of the SIMATIC Selection Tool and combines the known
configurators for automation technology into one tool.
With the TIA Selection Tool, you can generate a complete order list from your product
selection or product configuration.
You can find the TIA Selection Tool on the Internet
(http://w3.siemens.com/mcms/topics/en/simatic/tia-selection-tool).

Documentation guide
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SIMATIC Automation Tool
You can use the SIMATIC Automation Tool to run commissioning and maintenance activities
simultaneously on various SIMATIC S7 stations as a bulk operation independently of the TIA
Portal.
The SIMATIC Automation Tool provides a multitude of functions:
●Scanning of a PROFINET/Ethernet network and identification of all connected CPUs
●Address assignment (IP, subnet, gateway) and station name (PROFINET device) to a
CPU
●Transfer of the date and the programming device/PC time converted to UTC time to the
module
●Program download to CPU
●Operating mode switchover RUN/STOP
●Localization of the CPU by means of LED flashing
●Reading out CPU error information
●Reading the CPU diagnostic buffer
●Reset to factory settings
●Updating the firmware of the CPU and connected modules
You can find the SIMATIC Automation Tool on the Internet
(https://support.industry.siemens.com/cs/ww/en/view/98161300).
PRONETA
With SIEMENS PRONETA (PROFINET network analysis), you analyze the PROFINET
network during commissioning. PRONETA features two core functions:
●The topology overview independently scans PROFINET and all connected components.
●The IO check is a fast test of the wiring and the module configuration of a system.
You can find SIEMENS PRONETA on the Internet
(https://support.industry.siemens.com/cs/ww/en/view/67460624).

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Product overview
2
2.1
Properties
Part number:
6ES7521-7EH00-0AB0
View of the module
Figure 2-1 View of the module DI 16x24...125VUC HF
Properties
The module has the following technical properties:
●16 digital inputs; electrically isolated in groups of 1
●Rated input voltage 24 V UC to 125 V UC
●Configurable diagnostics (per channel)
●Configurable hardware interrupt (per channel)
●Programmable input delay (only with DC)
●Suitable for switches and 2-/3-/4-wire proximity switches

Product overview
2.1 Properties
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The module supports the following functions:
Table 2- 1 Version dependencies of the module functions
Function
Firmware version
of the module
Configuration software
STEP 7
(TIA Portal) as of V13 SP1
with HSP 0142
GSD file in STEP 7
(TIA Portal) as of V12 or
STEP 7 as of V5.5 SP3
Firmware update
V1.0.0 or higher
X
--- / X
Identification data I&M0 to I&M3
V1.0.0 or higher
X
X
Parameter assignment in RUN V1.0.0 or higher X X
Module internal shared input (MSI) V1.0.0 or higher X
(PROFINET IO only)
X
(PROFINET IO only)
Configurable submodules / submod-
ules for Shared Device
V1.0.0 or higher X
(PROFINET IO only)
X
(PROFINET IO only)
You can configure the module with STEP 7 (TIA Portal) and with a GSD file.
Accessories
The following accessories are supplied with the module and can also be ordered separately
as spare parts:
●Labeling strips
●U connector
●Universal front cover
Other components
The following component must be ordered separately:
Front connectors, including potential jumpers and cable ties
You can find additional information on accessories in the system manual S7-1500/ET 200MP
(http://support.automation.siemens.com/WW/view/en/59191792).

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Wiring
3
3.1
Wiring and block diagram
This section contains the block diagram of the module and outlines various wiring options.
You can find information on wiring the front connector, establishing a cable shield, etc. in the
system manual S7-1500/ET 200MP
(http://support.automation.siemens.com/WW/view/en/59191792).
Note
Do not insert the potential jumpers included with the front connector!
Wiring and block diagram
The figure below shows you how to wire the module and the assignment of the channels to
the addresses (input byte a to input byte b).
①
Backplane bus interface
CHx
Channel or channel status LED (green/red)
RUN
Status display LED (green)
ERROR
Error display LED (red)
Figure 3-1 Block diagram and terminal assignment

Wiring
3.1 Wiring and block diagram
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Resistor circuitry of the encoders
To detect a wire break, it is necessary that enough quiescent current is flowing even when
the encoder contacts are open. Connect a resistor to the encoder contacts for this reason,
see figure below.
Rated input voltage:
Resistance:
24 VUC
16 kΩ... 21 kΩwith 1.0 W
48 VUC
37 kΩ... 53 kΩwith 0.5 W
125 VUC
101 kΩ... 156 kΩwith 0.25 W
Figure 3-2 Resistor circuitry of the encoders

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Parameters/address space
4
4.1
Parameters
DI 16x24...125VUC HF parameters
When you assign the module parameters in STEP 7, you use various parameters to specify
the module properties. The following table lists the configurable parameters. The effective
range of the configurable parameters depends on the type of configuration. The following
configurations are possible:
●Central operation with a S7-1500 CPU
●Distributed operation on PROFINET IO in an ET 200MP system
●Distributed operation on PROFIBUS DP in an ET 200MP system
For parameter assignment in the user program, the parameters are transferred to the
module using the WRREC instruction (parameter assignment in RUN) and data records; see
chapter Parameter assignment and structure of the parameter data records (Page 32).
Table 4- 1 Configurable parameters and their defaults
Parameter
Range of values
Default setting
Parameter
reassign-
ment in
RUN
Range of effectiveness with configura-
tion software, e.g. STEP 7
Integrated in the
hardware catalog
as of STEP 7, V13
SP1 or GSD file
PROFINET IO
GSD file
PROFIBUS DP
Diagnostics
•Wire break Yes/No No Yes Channel Channel group
(CH0 to CH7,
CH8 to CH15)
Input delay
0.05 ms, 0.1 ms,
0.4 ms, 1.6 ms, 3.2 ms,
12.8 ms, 20 ms
•20 ms
•Fixed 20 ms
for AC
Yes Channel Channel group
(CH0 to CH7,
CH8 to CH15)
Hardware interrupt
•Rising edge Yes/No No Yes Channel Channel
•Falling edge Yes/No No Yes Channel Channel
•Rising and falling
edge
Yes/No No Yes Channel Channel

Parameters/address space
4.2 Declaration of parameters
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Note
Input delay for AS input voltages
If you are operating channels of the module with an AC input voltage, you must set the input
delay for these channels at 20 ms.
If you set a different input delay, the input signal might be incorrectly altered and the wron
g
value read.
4.2
Declaration of parameters
Wire break
Enabling diagnostics if the line to the encoder is interrupted.
Input delay
This parameter can be used to suppress signal disruptions. Changes to the signal are only
detected if they are constantly pending longer than the set input delay time.
Hardware interrupt
Specifies whether or not a hardware interrupt is disabled or with which of the following
events a hardware interrupt is generated.
●Rising edge
●Falling edge
●Rising and falling edge

Parameters/address space
4.3 Address space
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4.3
Address space
The module can be configured differently in STEP 7; see following table. Depending on the
configuration, additional/different addresses are assigned in the process image of the inputs.
The letters "a" and "b" are printed on the module. "IB a" for example, stands for module start
address input byte a.
Configuration options of DI 16x24...125VUC HF
You can configure the module with STEP 7 (TIA Portal) or with a GSD file.
When you configure the module by means of the GSD file, the configurations are available
under different abbreviations/module names.
The following configurations are possible:
Table 4- 2 Configuration options
Configuration
Short designation/
module name in the
GSD file
Configuration software, e.g., with STEP 7 (TIA Portal)
Integrated in the hardware
catalog as of STEP 7
(TIA Portal) V13 SP1 with
HSP 0142
GSD file in
STEP 7 (TIA Portal) V12
or higher or STEP 7 V5.5
SP3 or higher
1 x 16-channel without value sta-
tus
DI 16x24...125VUC HF X X
1 x 16-channel with value status
DI 16x24...125VUC HF QI
X
X
2 x 8-channel without value status DI 16x24...125VUC HF S X
(PROFINET IO only)
X
(PROFINET IO only)
2 x 8-channel with value status DI 16x24...125VUC HF S QI X
(PROFINET IO only)
X
(PROFINET IO only)
1 x 16-channel with value status
for module-internal shared input
with up to 4 submodules
DI 16x24...125VUC HF MSI X
(PROFINET IO only)
X
(PROFINET IO only)
Value status (Quality Information, QI)
The value status is always activated for the following module names:
●DI 16x24...125VUC HF QI,
●DI 16x24...125VUC HF S QI
●DI 16x24...125VUC HF MSI
An additional bit is assigned to each channel for the value status. The value status bit
indicates if the read in digital value is valid. (0 = value is incorrect).

Parameters/address space
4.3 Address space
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Address space for configuration as 16-channel DI 16x24...125VUC HF QI
The figure below shows the assignment of the address space for the configuration as a
16-channel module with value status. You can freely assign the start address for the module.
The addresses of the channels are derived from the start address.
Figure 4-1 Address space for configuration as 16-channel DI 16x24...125VUC HF QI with value
status
Address space for configuration as 2 x 8-channel DI 16x24...125VUC HF S QI
For the configuration as a 2 x 8-channel module, the channels of the module are divided into
multiple submodules. The submodules can be assigned to different IO controllers when the
module is used in a shared device.
The number of usable IO controllers depends on the interface module used. Please observe
the information in the manual for the particular interface module.
Contrary to the 1 x 16-channel module configuration, each of the two submodules has a
freely assignable start address.
Figure 4-2 Address space for configuration as 2 x 8-channel DI 16x24...125VUC HF S QI

Parameters/address space
4.3 Address space
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Address space for configuration as 1 x 16-channel DI 16x24...125VUC HF MSI
The channels 0 to 15 of the module are copied in up to four submodules with configuration
1 x 16-channel module (Module-internal shared input, MSI). Channels 0 to 15 are then
available with identical input values in different submodules. These submodules can be
assigned to up to four IO controllers when the module is used in a shared device. Each
IO controller has read access to the same channels.
The number of IO controllers depends on the interface module being used. Please observe
the information in the manual for the particular interface module.
Value status (Quality Information, QI)
The meaning of the value status depends on the submodule involved.
For the 1st submodule (= basic submodule), the value status 0 indicates that the value is
incorrect.
For the 2nd to 4th submodule (=MSI submodule), the value status 0 indicates that the value
is incorrect or the basic submodule has not yet been configured (not ready).
The following figure shows the assignment of the address space with submodules 1 and 2
and the value status.
Figure 4-3 Address space for configuration as 1 x 16-channel DI 16x24...125VUC HF MSI

Parameters/address space
4.3 Address space
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The following figure shows the assignment of the address space with submodules 3 and 4
and the value status.
Figure 4-4 Address space for configuration as 1 x 16-channel DI 16x24...125VUC HF MSI
Reference
You can find information on the module-internal shared input/shared output (MSI/MSO)
function in the section Module-internal shared input/shared output (MSI/MSO) of the function
manual PROFINET with STEP 7 V13
(https://support.industry.siemens.com/cs/ww/en/view/49948856).