Siemens SIMATIC NET DP/AS-i Link 20E User manual

Preface, Contents
Technical Description, Installation
Instructions, Operation 1
Data Exchange between
DP Master and AS-i Slave 2
Using the Command Interface 3
Slave Diagnostics 4
Eliminating Problems /
Error Displays 5
Appendix
AS-Interface Protocol
Implementation Conformance
Statements A
References B
Note on the CE Mark C
Glossary D
Index
Release 08/2008
C79000-G8976-C235−01
DP/AS-Interface Link 20E
Manual
SIMATIC NET
The following supplements belong
to this documentation
(Edition 01/2023):
1 Approvals
1.1 Ex certificates

2DP/AS-InterfaceLink 20E
Release 08/2008
C79000-G8976-C235−01
Classification of Safety-Related Notices
This manual contains notices which you should observe to ensure your own perso-
nal safety, as well as to protect the product and connected equipment. These noti-
ces are highlighted in the manual by a warning triangle and are marked as follows
according to the level 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 can result if proper precautions are
not taken.
!Caution
with warning triangle indicates that minor personal injury can result if proper
precautions are not taken.
Caution
without warning triangle indicates that damage to property can result if proper
precautions are not taken.
Notice
indicates that an undesirable result or status can result if the relevant notice is
ignored.
Note
highlights important information on the product, using the product, or part of the
documentation that is of particular importance and that will be of benefit to the
user.

3
DP/AS-InterfaceLink 20E
Release 08/2008
C79000-G8976-C235−01
TrademarksSIMATICR, SIMATIC HMIRand SIMATIC NETRare registered trademarks of
SIEMENS AG.
Third parties using for their own purposes any other names in this document which
refer to trademarks might infringe upon the rights of the trademark owners.
Safety Instructions Regarding your Product:
Before you use the product described here, read the safety instructions below tho-
roughly.
Qualified Personnel
Only qualified personnel should be allowed to install and work on this equipment.
Qualified persons are defined as persons who are authorized to commission, to
ground, and to tag circuits, equipment, and systems in accordance with establis-
hed safety practices and standards.
Correct Usage of Hardware Products
Note the following:
!Warning
This device and its components may only be used for the applications described in
the catalog or the technical description, and only in connection with devices or
components from other manufacturers which have been approved or
recommended by Siemens.
This product can only function correctly and safely if it is transported, stored, set
up, and installed correctly, and operated and maintained as recommended.
Before you use the supplied sample programs or programs you have written
yourself, make certain that no injury to persons nor damage to equipment can
result in your plant or process.
EU Directive: Do not start up until you have established that the machine on which
you intend to run this component complies with the directive 98/37/EC.
Correct Usage of Software Products
Note the following:
!Warning
This software may only be used for the applications described in the catalog or the
technical description, and only in connection with software products, devices, or
components from other manufacturers which have been approved or
recommended by Siemens.
Before you use the supplied sample programs or programs you have written
yourself, make certain that no injury to persons nor damage to equipment can
result in your plant or process.

4DP/AS-InterfaceLink 20E
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Prior to Startup
Prior to startup, note the following:
Caution
Prior to startup, note the information and follow the instructions in the latest docu-
mentation. You will find the ordering data for this documentation in the relevant
catalogs or contact your local Siemens office.
We have checked the contents of this manual for agreement with the hard-
ware and software described. Since deviations cannot be precluded entirely,
we cannot guarantee full agreement. However, the data in this manual are
reviewed regularly and any necessary corrections included in subsequent
editions. Suggestions for improvement are welcomed.
Disclaimer of LiabilityCopyright ESiemensAG 2001−2008 All rights reserved
The reproduction, transmission or use of this document or its contents is not
permitted without express written authority. Offenders will be liable for
damages. All rights, including rights created by patent grant or registration of
a utility model or design, are reserved.
Siemens AG
Industry Automation
Industrial Communication
Postfach 4848, D-90327 Nuernberg Technical data subject to change.
Siemens Aktiengesellschaft G79000−G8976−C235−01

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DP/AS-InterfaceLink 20E
Release 08/2008
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Preface
Purpose of the manual
This manual supports you when using the DP/AS−Interface Link 20E module, in
places shortened to DP/AS−i Link 20E in the following chapters. It contains
information about how PROFIBUS DP masters can address AS-i actuators and
AS-i sensors via this module.
Validity of this manual
This manual is valid for the DP/AS–i Link 20E with order number
6GK1 415–2AA10 as of hardware version 1 and with firmware version V3.0.
We recommend the following procedure ...
... If you want an overall picture of the AS-Interface:
− First read the ‘AS-Interface Introduction and Basic Information’ manual (not
part of this documentation package). This contains general information
about the AS-Interface, abbreviated to AS-i in the following chapters.
... If you want to set up an AS-i system and include the DP/AS−i Link 20E in it:
− You will find the information you require about connecting and operating the
DP/AS−i Link 20E in Chapter 1.
... You want to know how to operate the DP/AS−i Link 20E from the point of view
of the PROFIBUS DP master:
− Read Chapter 2 in this manual.
− Chapter 3 explains the command interface.
Requirements
To understand this manual, you require the following:
SA working knowledge of PROFIBUS DP
SFamiliarity with the manual ‘AS-Interface − Introduction and Basic Information’
(on the accompanying product CD).

Preface
6DP/AS-InterfaceLink 20E
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CD with the GSD file
The accompanying CD contains the GSD file that you require to configure the
DP/AS−i Link 20E with your DP master, if the DP master is not a Siemens device
(see Section 1.10.1 ).
-

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Contents
1 Technical description, installation instructions, operation 10. . . . . . . . . . . . . .
1.1 General notes on operation − safety warnings 11. . . . . . . . . . . . . . . . . . . .
1.2 Use of the module 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Technical data of the module 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4 Approvals 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5 Installing the module 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6 Front panel − access to all functions 17. . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.7 Connection to AS-Interface and PROFIBUS 18. . . . . . . . . . . . . . . . . . . . .
1.8 Display and controls 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.8.1 Display modes and meaning of the LEDs 20. . . . . . . . . . . . . . . . . . . . . . . .
1.8.2 Status display 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.8.3 Slave display for AS-i slaves 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.8.4 Displaying and setting the PROFIBUS address 24. . . . . . . . . . . . . . . . . . .
1.9 Configuring the AS-Interface with the SET button (push button
configuration) 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.9.1 “Configuration mode” and “protected mode” 27. . . . . . . . . . . . . . . . . . . . . .
1.9.2 Configuring using push buttons 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.10 Configuring the DP/AS-i Link 20E as DP slave on the DP master 29. . .
1.10.1 General procedure 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.10.2 Importing the GSD file 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.10.3 Configuration in STEP 7 − basic configuration 32. . . . . . . . . . . . . . . . . . . .
1.10.4 Configuration in STEP 7 − slave configuration 35. . . . . . . . . . . . . . . . . . . .
1.10.5 Uploading the actual configuration 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Data exchange between DP master and AS-i slave 43. . . . . . . . . . . . . . . . . . . . .
2.1 Steps involved − an overview 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 How the interfaces work 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 Transferring AS-i binary values 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.1 Addressing AS-i slaves 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.2 CLASSIC addressing table (default) 46. . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.3 LINEAR addressing table 49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.4 Packed addressing table 50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.5 Special feature of AS-i analog slaves 50. . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.6 Points to note about AS-i safety slaves 50. . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.7 Accessing AS-i digital data 50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4 Transferring AS-i analog values 51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4.1 Calling the acyclic services 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4.2 Programming 54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents
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2.4.3 Programming examples 58. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.5 PROFIBUS DP control commands 59. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Using the Command Interface 60. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 Command Interface of the DP/AS-Interface Link 20E 60. . . . . . . . . . . . . .
3.2 Command Interface for SIMATIC S7 66. . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Description of the AS-i Slave Commands 72. . . . . . . . . . . . . . . . . . . . . . . .
3.3.1 Set_Permanent_Parameter 75. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.2 Get_Permanent_Parameter 76. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.3 Write_Parameter 77. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.4 Read_Parameter 78. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.5 Store_Actual_Parameters 79. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.6 Set_Extended_Permanent_Configuration 80. . . . . . . . . . . . . . . . . . . . . . . .
3.3.7 Get_Extended_Permanent_Configuration 81. . . . . . . . . . . . . . . . . . . . . . . .
3.3.8 Store_Actual_Configuration 82. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.9 Get_Extended_Actual_Configuration 83. . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.10 Set_LPS 84. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.11 Set_Offline_Mode 85. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.12 Select Autoprogramming 86. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.13 Set_Operation_Mode 87. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.14 Change_AS-i_Slave_Address 88. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.15 Get_AS-i_Slave_Status 89. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.16 Get_LPS, Get_LAS, Get_LDS, Get_Flags 90. . . . . . . . . . . . . . . . . . . . . . .
3.3.17 Get_Extended_Total_Configuration 93. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.18 Store_Extended_Total_Configuration 98. . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.19 Write_Extended_Parameter_List 104. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.20 Read_Extended_Parameter_Echo_List 105. . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.21 Read_Version_ID 106. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.22 Read_AS-i_Slave_ID 108. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.23 Read_AS-i_Slave_Extended_ID1 109. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.24 Write_AS-i_Slave_Extended_ID1 110. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.25 Read_AS-i_Slave_Extended_ID2 111. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.26 Read_AS-i_Slave_I/O 112. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.27 Get_LPF 113. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.28 Write_AS-i_Slave_Parameter_String 114. . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.29 Read_AS-i_Slave_Parameter_String 115. . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.30 Read_AS-i_Slave_ID_String 116. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.31 Read_AS-i_Slave_Diagnostic_String 117. . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.32 Read_Write_CTT2_request 118. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Slave diagnostics 119. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1 Overview 119. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 Station status 1 to 3 120. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3 PROFIBUS address of the DP master and vendor ID 122. . . . . . . . . . . . .
4.4 Structure of ID-related diagnostics 123. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.5 Structure of the device-related diagnostic information 123. . . . . . . . . . . . .
5 Dealing with Problems/Error Displays 125. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1 Replacing a Defective AS-i Slave/Automatic Address Programming 125.

Contents
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5.2 Error Displays/Remedying Errors 126. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A AS-Interface Protocol Implementation Conformance Statement (PICS) 129. .
B References 133. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C Notes on the CE Mark 135. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D Glossary 137. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Index 143. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10 DP/AS-Interface Link 20E
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Technical description, installation
instructions, operation
This chapter explains the performance, installation and basic functions of the
master module DP/AS−Interface Link 20E (DP/AS-i Link 20E).
You will learn the following, ...
SHow to install the DP/AS-i Link 20E;
SThe display and control elements of the DP/AS-i Link 20E;
SHow to configure the DP/AS-i Link 20E with the push button;
SHow to configure a SIMATIC S7 DP master in STEP 7;
SHow to set the PROFIBUS address for the DP/AS-i Link 20E.
1

Technical description, installation instructions, operation
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DP/AS-InterfaceLink 20E
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1.1 General notes on operation − safety warnings
!Caution
When handling and installing the DP/AS-i Link 20E , make sure that you adhere to
the ESD guidelines.
The DP/AS-i Link 20E must only be connected when the AS-i power supply unit is
turned off.
!Caution
Noise immunity/grounding
To ensure the noise immunity of the DP/AS-i Link 20E, both the DP/AS-i Link 20E
and the AS-i power supply unit must be grounded correctly.
!Caution
The AS-i power supply unit used must provide a low voltage, safely isolated from
the network. This safe isolation can be implemented according to the following
requirements:
SVDE 0100 Part 410 = HD 384-4-4 = IEC 364-4-41
(as functional extra-low voltage with safe isolation) or
SVDE 0805 = EN60950 = IEC 950
(as safety extra-low voltage SELV) or
SVDE 0106 Part 101
Note
The DP/AS-i Link 20E can be configured, installed and started up independent of
the PROFIBUS installation.

Technical description, installation instructions, operation
12 DP/AS-InterfaceLink 20E
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1.2 Use of the module
DP slave and AS-Interface master
The DP/AS-i Link 20E is both a PROFIBUS DP slave and an AS master at the
same time:
SThe DP/AS-i Link 20E connects the actuator-sensor interface with PROFIBUS
DP.
SUsing the DP/AS-i Link 20E, you can access the inputs and outputs of the AS-i
slaves from PROFIBUS DP. Depending on the slave type, you can access
binary values or analog values.
The following AS-i slaves can be used:
− Standard slaves / AS-i analog slaves
− Slaves with the extended addressing mode
Branch
AS-i
power supply
Active module
(with slave ASIC)
Passive module
(without slave ASIC)
AS-i
cable
Actuator/sensor
with slave ASIC
Wider networking via PROFIBUS DP
DP/AS-Interface Link 20E
AS-i modules
with
extended
addressing mode
5A slave5B slave
DP AS/INTERFACE LINK 20E
6GK1 415-2AA10 V3.0
SIEMENS
Figure 1-1 Example of a system configuration with the DP/AS-i Link 20E

Technical description, installation instructions, operation
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DP/AS-InterfaceLink 20E
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Features
DP/AS-i Link 20E allows the exchange of I/O data with a DPV0, DPV1 master and
the AS-i slaves with byte or word consistency.
SDPV0 mode
In DPV0 mode, with a maximum of 32/32 bytes I/O, up to 62 digital AS-i slaves
can be served at a transmission speed of 9.6 Kbps to 12 Mbps. The command
interface and access to the AS-i analog values are not available in DPV0 mode.
SDPV1 mode
In DPV1/DPx mode, with a maximum of 32/32 bytes I/O, up to 62 digital AS-i
slaves can be served at a transmission speed of 9.6 Kbps to 12 Mbps.
In addition to this, a maximum of 62 AS-i analog slaves with up to 2 analog I/O
channels can be served.
Commands according to the AS-i master specification are implemented with the
read_record/write_record (data record 2) services.
Components of the product
The product DP/AS-i Link 20E includes the following components:
SDP/AS-i Link 20E
SCD with sample program and documentation
The STEP 7 block FC “ASi_3422” is on this CD.

Technical description, installation instructions, operation
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1.3 Technical data of the module
The DP/AS-i Link 20E has the following technical data:
Table 1-1
Feature Explanation/values
AS-i cycle time S5 ms with 31 slaves
S10 ms for 62 slaves with the extended
addressing mode
Configuration of the AS-Interface Using a button on the front panel or with STEP 7
Supported AS-i master profiles M1...M4
Connection of the AS-i cable Via a 12-pin terminal block
Permitted current loading from terminal 1 to
terminal 3 or terminal 2 to terminal 4, maximum 3 A
Connection to PROFIBUS Via 9-pin sub D female connector
PROFIBUS address setting − Address range 1 to 126
− Set with SET and DISPLAY buttons
Permitted loading 5V DC at PROFIBUS connector max. 90 mA
Data rates supported (transmission rate) on
PROFIBUS 9.6 Kbps; 19.2 Kbps; 45.45 Kbps; 93.75 Kbps;
187.5 Kbps; 500 Kbps; 1.5 Mbps; 3 Mbps;
6 Mbps; 12 Mbps
Power supply from the AS-i cable
Current consumption from the AS-i cable 29.5 V to 31.6 V DC max. 200 mA at 30 V
Power consumption max. 4.5 W
Cable length max. 100 m
Cable diameter (AS-i cable) 2 x 1.5 mm2
(2 x 0.8 mm2: reduced cable length!)
Ambient conditions
SOperating temperature Horizontal installation: 0 to 60°C
Vertical installation: 0 to 45°C
STransportation and storage temperature −40°C to +70°C
SRelative humidity max. 95% at +25°(non-condensing)
Construction
SType of protection IP 20
SDimensions (W x H x D) in mm 90 x 80 x 62
SWeight approx. 200 g

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1.4 Approvals
Table 1-2 Description of the approvals
Note
The current approvals are printed on the module.
c−UL−us UL 508
CSA C22.2 No. 142
c−UL−us for hazardous locations ANSI / ISA 12.12.01, CSA C22.2 No. 213−M1987
CL. 1, Div. 2 GP.A.B.C.D T4
CL. 1, Zone 2, GP.IIC, T4
CL. 1, Zone 2, AEx nC IIC T4
FM FM 3611
CL. 1, Div. 2 GP.A.B.C.D T4
CL. 1, Zone 2, GP.IIC. T4
Ta: 0...+60°C
C−TICK AS/NZS 2064 (Class A)
CE
UKCA
EN IEC 60079-0:2018
EN IEC 60079-7/A1:2018
EN IEC 63000:2018
EN IEC 60079-15:2019
EN62026-2/A1:2019
ATEX
UKEX
IECEx
See Chapter Approvals

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1.5 Installing the module
Options
DP/AS-i Link 20E has degree of protection IP20.
SYou can install the DP/AS-i Link 20E on a standard rail (DIN rail complying with
EN 50022).
SAs an option, you can also install the module on a wall directly using the
mounting holes in the casing.
Installation on a DIN rail
If you decide to install a module on a DIN rail, please note the following points:
1. The module is placed on the standard rail from above and then pushed down
until the catch at the bottom of the module locks into position.
2. Other modules can be installed to the left and right of the module.
Removing the module from the DIN rail
To remove the module from the DIN rail, follow the procedure below:
1. When removing the module from the standard rail, the power supply and signal
cables must be removed first.
2. After the cables have been disconnected, press the catch on the module down
using a screwdriver and pull the module out of the rail towards the top.
Convection
Make sure that you leave at least 5 cm clearance above and below the module to
allow heat dissipation.
Vertical installation
The standard rail can also be installed vertically. Due to the reduced convection,
the maximum permitted ambient temperature is reduced to 455C.
Fit a grounding clip to the DIN rail below the DP/AS-i Link 20E to prevent it slipping
down on the DIN rail.

Technical description, installation instructions, operation
17
DP/AS-InterfaceLink 20E
Release 08/2008
C79000-G8976-C235−01
1.6 Front panel − access to all functions
Connection, display and control elements
On the front panel, you have access to all the connection, display and control
elements of the DP/AS-i Link 20E.
The terminal block for connecting to the AS-Interface at the bottom right is covered
by a front panel.
PROFIBUS
connector (socket)
Slave display
SLED “B”
S3 group LEDs
S5 slave LEDs
SET button
Sfor AS-i configuration
Sfor setting the
PROFIBUS address
DISPLAY button
Sswitches over the
display
Mounting hole
for
wall installation
DP AS/INTERFACE LINK 20E
6GK1 415-2AA10 V3.0 X 2
3 4
Display
SET
SF
BF
PWR
APF
CER AUP
CM
B
ADR
SIEMENS
Status display
S7 LEDs
Mounting hole fo
r
wall installation
Terminals
for AS-Interface
(below panel)
PROFIBUS address display
SLED “ADR”
SLower row of LEDs
Figure 1-2 Front view

Technical description, installation instructions, operation
18 DP/AS-InterfaceLink 20E
Release 08/2008
C79000-G8976-C235−01
1.7 Connection to AS-Interface and PROFIBUS
Connections
DP/AS-i Link 20E has the following connectors:
STwo connectors to the AS-i cable (bridged internally)
SConnectors for functional ground
SOne connection to PROFIBUS (9-pin sub D female connector)
The AS-i connectors are located below the lower cover of the front panel of the
DP/AS-i Link 20E.
Connectors to the AS-i cable
The DP/AS-i Link 20E is supplied with power from the AS-Interface.
!Warning
The device is designed for operation with safety extra-low voltage (SELV). This
means that only safety extra-low voltages (SELV) complying with
IEC950/EN60950/ VDE0805 may be connected to the power supply terminals.
The power unit for supplying the device must comply with NEC Class 2 as descri-
bed by the National Electrical Code(r) (ANSI/NFPA 70).
The DP/AS-i Link 20E has two connectors for AS-i cables, that are jumpered
internally in the DP/AS-i Link 20E.
This allows the DP/AS-i Link 20E to be looped into the AS-i cable.
!Caution
The DP/AS-i Link 20E may only be connected/disconnected when the AS-i power
supply unit is turned off.
The maximum current via the AS-i contacts is 3 A. If this value is exceeded on the
AS-i cable, the DP/AS-i Link 20E may not be looped into the AS-i cable but must
be connected via a tap line (only one connector pair of the DP/AS-i Link 20E
used).

Technical description, installation instructions, operation
19
DP/AS-InterfaceLink 20E
Release 08/2008
C79000-G8976-C235−01
-
+- +
PROFIBUS DP
AS-i cables
Functional
ground
Unused connectors 8, 9, 10, 11
Figure 1-3 Connection of the AS-i cable
Functional ground
The DP/AS-i Link 20E has four connectors for functional ground. One of these
connectors should be connected to the PE conductor with as little resistance as
possible.
!Caution
The free terminals 8, 9, 10 and 11 in the terminal block must not be connected.
Connector for PROFIBUS DP
Connection to PROFIBUS DP is via a 9-pin sub D female connector.
!Warning
When laying and installing the PROFIBUS DP cable and the bus connector, follow
the instructions in /4/.
To connect to PROFIBUS DP, bus connectors are available with cable outlets at
different angles (05, 305and 905). Once again, follow the instructions in /4/.

Technical description, installation instructions, operation
20 DP/AS-InterfaceLink 20E
Release 08/2008
C79000-G8976-C235−01
1.8 Display and controls
1.8.1 Display modes and meaning of the LEDs
Meaning of the LED display
SThe status display
The status display indicates statuses and error messages of the Link module
itself and the connected AS-i line. The following LEDs belong to the status
display:
− The 3 status LEDs “SF”, “BF” and “PWR” in the LED column at the top left
− The 4 status LEDs “APF”, “CER”, “AUP” and “CM” in the upper row of LEDs
SThe slave display
The slave display shows activated or malfunctioning AS-i slaves:
− The 5 left-hand LEDs of the bottom row of LEDs (slave LEDs) show the
slave number.
− The 3 right-hand LEDs of the bottom row of LEDs (group LEDs) show the
slave group.
− The “B” LED in the upper row of LEDs shows B slaves.
SThe PROFIBUS address display
The PROFIBUS address display is used to display and set the PROFIBUS
address of the DP/AS-i Link 20E. It includes the following LEDs:
− The 7 right-hand LEDs of the lower row of LEDs (from the left: LED no. 2−8)
− The “ADR” LED in the upper row of LEDs to the right
Changing between the slave display and PROFIBUS address display
The lower row of LEDs (see Figure 1-2) has a double function:
SIn the “Slave display“ mode to display the connected slave modules
SIn the “PROFIBUS address display“ to display the PROFIBUS address
With the “Display” button, you change between the slave display and PROFIBUS
address display. For details on changing over the display mode, refer to Sections
1.8.3 and 1.8.4.