Siemens SIMATIC NET User manual

Optical link module
SIMATIC NET
Network components/PROFIBUS
Optical link module
Operating Instructions
01/2020
C79000
-G8976-C270-06
Introduction
1
Description of the device
2
Commissioning
3
Operator control (hardware)
4
Mounting
5
Connection
6
Planning/configuring
7
Service and maintenance
8
Troubleshooting/FAQs
9
Technical data
10
Dimension drawings
11
Approvals
12
Appendix
A

Siemens AG
Digital Industries
Postfach 48 48
90026 NÜRNBERG
GERMANY
C79000-G8976-C270-06
Ⓟ
02/2020 Subject to change
Copyright © Siemens AG 2007 - 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.

Optical link module
Operating Instructions, 01/2020, C79000-G8976-C270-06 3
Table of contents
1 Introduction............................................................................................................................................. 5
2 Description of the device......................................................................................................................... 9
2.1 Product overview ......................................................................................................................9
2.2 Device view of an OLM...........................................................................................................10
2.3 Properties and functions .........................................................................................................11
2.4 Area of application ..................................................................................................................13
2.5 LED display.............................................................................................................................13
2.5.1 Overview .................................................................................................................................13
2.5.2 "SYSTEM" LED.......................................................................................................................13
2.5.3 LED "CH1"/"CH0" - electrical ..................................................................................................15
2.5.4 LED "CH2"/"CH3" - optical......................................................................................................16
2.5.5 LED "CH2-LEVEL"/"CH3-LEVEL" ..........................................................................................17
3 Commissioning ..................................................................................................................................... 19
4 Operator control (hardware) .................................................................................................................. 21
4.1 Setting compatibility ................................................................................................................21
4.2 Setting the operating mode.....................................................................................................23
4.2.1 Setting the mode of the electrical channel (CH1) ...................................................................23
4.2.2 Setting the mode of the electrical channel (CH0) ...................................................................24
4.2.3 Setting the mode of the optical channels (CH2/CH3).............................................................25
4.3 Reducing optical transmit power.............................................................................................27
4.4 DIL switches S5 / S6 with OLM / G11-1300 and OLM / G12-1300 ........................................30
4.5 Mixed operation OLM V4 with OLM V2 (SINEC L2FO)..........................................................30
5 Mounting............................................................................................................................................... 31
5.1 Installation guide .....................................................................................................................32
5.2 Types of installation ................................................................................................................36
5.3 Mounting on DIN rails .............................................................................................................37
5.4 Wall mounting .........................................................................................................................38
6 Connection ........................................................................................................................................... 41
6.1 Electrical RS-485 bus cables..................................................................................................44
6.2 Operating power supply..........................................................................................................46
6.3 Signaling contact.....................................................................................................................47
6.4 Optical channels .....................................................................................................................48
6.5 Connecting optical cables.......................................................................................................51
7 Planning/configuring.............................................................................................................................. 53

Table of contents
Optical link module
4Operating Instructions, 01/2020, C79000-G8976-C270-06
7.1 Network topologies ................................................................................................................ 53
7.1.1 Possible network topologies .................................................................................................. 53
7.1.2 Installation guide .................................................................................................................... 53
7.1.3 Bus topology .......................................................................................................................... 54
7.1.4 Star topology .......................................................................................................................... 57
7.1.5 Ring topology ......................................................................................................................... 59
7.1.5.1 Redundant optical ring ........................................................................................................... 59
7.1.5.2 Redundant optical ring with two OLMs .................................................................................. 61
7.2 Configuration.......................................................................................................................... 65
7.2.1 Configuring optical bus and star topology.............................................................................. 65
7.2.2 Configuring redundant optical rings ....................................................................................... 65
8 Service and maintenance...................................................................................................................... 69
8.1 Cleaning ................................................................................................................................. 69
8.2 Maintenance........................................................................................................................... 70
9 Troubleshooting/FAQs .......................................................................................................................... 71
10 Technical data ...................................................................................................................................... 73
11 Dimension drawings.............................................................................................................................. 77
12 Approvals ............................................................................................................................................. 79
A Appendix .............................................................................................................................................. 87
A.1 Abbreviations/acronyms......................................................................................................... 87
A.2 Literature ................................................................................................................................ 88
Index .......................................................................................................................................................... 89

Optical link module
Operating Instructions, 01/2020, C79000-G8976-C270-06 5
Introduction
1
CAUTION
To prevent injury, read the manual before use.
Purpose of the Operating Instructions
These operating instructions support you when commissioning PROFIBUS OLM devices
(Optical Link Modules).
Validity of the Operating Instructions
These operating instructions apply to the following devices:
●SIMATIC NET OLM / P11 V4.1
●SIMATIC NET OLM / P12 V4.1
●SIMATIC NET OLM / P22 V4.1
●SIMATIC NET OLM / G11 V4.0
●SIMATIC NET OLM / G12 V4.0
●SIMATIC NET OLM / G22 V4.0
●SIMATIC NET OLM / G12-EEC V4.0
●SIMATIC NET OLM / G11-1300 V4.0
●SIMATIC NET OLM / G12-1300 V4.0
Audience
These Operating Instructions are intended for personnel involved in the commissioning of
PROFIBUS networks with the link modules of the OLM series.
Finding information
To help you to find the information you require more quickly, the manual includes not only
the table of contents but also the following aids:
●Abbreviations/acronyms
●Index

Introduction
Optical link module
6Operating Instructions, 01/2020, C79000-G8976-C270-06
Further documentation
You will find more information on other SIMATIC NET products that you can use with the
OLM devices in the “SIMATIC NET PROFIBUS networks SIEMENS AG” manual.
Article numbers:
●C79000-G8900-C124-xx German
●C79000-G8976-C124-xx English
●C79000-G8977-C124-xx French
●C79000-G8972-C124-xx Italian
"xx" is a substitute for the current edition.
SIMATIC NET manuals
You will find SIMATIC NET manuals on the Internet pages of Siemens Industry Online
Support (https://support.industry.siemens.com/cs/de/en/).
SIMATIC NET glossary
Explanations of many of the specialist terms used in this documentation can be found in the
SIMATIC NET glossary.
You will find the SIMATIC NET glossary on the Internet at the following address:
50305045 (https://support.industry.siemens.com/cs/ww/en/view/50305045)
Unpacking and checking
WARNING
Do not use any parts that show evidence of damage
If you use damaged parts, there is no guarantee that the device will function according to
the specification.
If you use damaged parts, this can lead to the following problems:
•Injury to persons
•Loss of the approvals
•Violation of the EMC regulations
•Damage to the device and other components
Use only undamaged parts.
1. Make sure that the package is complete.
2. Check all the parts for transport damage.

Introduction
Optical link module
Operating Instructions, 01/2020, C79000-G8976-C270-06 7
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 (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 customers’ exposure
to cyber threats.
To stay informed about product updates, subscribe to the Siemens Industrial Security RSS
Feed under
https://www.siemens.com/industrialsecurity (https://www.siemens.com/industrialsecurity)

Introduction
Optical link module
8Operating Instructions, 01/2020, C79000-G8976-C270-06

Optical link module
Operating Instructions, 01/2020, C79000-G8976-C270-06 9
Description of the device
2
2.1 Product overview
Article numbers
Device
Article number
SIMATIC NET OLM / P11 V4.1
6GK1 503-2CA01
SIMATIC NET OLM / P12 V4.1
6GK1 503-3CA01
SIMATIC NET OLM / P22 V4.1
6GK1 503-4CA01
SIMATIC NET OLM / G11 V4.0
6GK1 503-2CB00
SIMATIC NET OLM / G12 V4.0 6GK1 503-3CB00
SIMATIC NET OLM / G22 V4.0
6GK1 503-4CB00
SIMATIC NET OLM / G12-EEC V4.0
6GK1 503-3CD00
SIMATIC NET OLM / G11-1300 V4.0
6GK1 503-2CC00
SIMATIC NET OLM / G12-1300 V4.0
6GK1 503-3CC00
Type designation
The type designation of an OLM is made up of several parts that have the following
meaning:

Description of the device
2.2 Device view of an OLM
Optical link module
10 Operating Instructions, 01/2020, C79000-G8976-C270-06
2.2 Device view of an OLM
The following figure shows a PROFIBUS OLM with all interfaces, display elements and
setting options.
①
LED display
②
Channel 1/0 (RS-485)
③
Channel 2 (optical)
•Transmitter (left)
•Receiver (right)
④
Channel 3 (optical)
•Transmitter (left)
•Receiver (right)
⑤
DIL switch for setting the modes
⑥
Operating voltage L1+/M/L2+
Signaling contact F1/F2
⑦
Sockets for measuring the levels of the optical interfaces
Figure 2-1 View from the front, side and top

Description of the device
2.3 Properties and functions
Optical link module
Operating Instructions, 01/2020, C79000-G8976-C270-06 11
2.3 Properties and functions
Device design
Every module has two (OLM P11, G11), three (OLM P12, G12) or four (OLM P22, G22)
independent channels (ports) that consist of a transmitter and a receiver part.
The power supply voltage for operation is 24 VDC. To increase operational reliability, a
redundant power supply is possible.
Channels
Electrical channels
The electrical channel is designed as a 9-pin D-sub female connector. An RS-485 bus
segment complying with the PROFIBUS standard EN 50170 /2/ can be connected to this
channel.
Optical channels
The fiber-optic cables are connected via BFOC/2.5 connectors.
Seven multicolor LEDs indicate the current operating mode and any disruptions as well as
the level ratios on the optical interfaces.
The following table shows the various connection options of the modules and the maximum
possible optical ranges of the individual channels.
P11
P12
P22
G11
G12
G12-
EEC
G22
G11-
1300
G12-
1300
Number of
channels
Electrical
1
1
2
1
1
2
1
1
Optical
1
2
2
1
2
2
1
2
Usable fiber
types
Plastic FO cable
980/1000 μm
80 m 80 m 80 m - - - - -
PCF FO cable fiber
(HCS®FO cable)
200/230 µm
400 m 400 m 400 m - - - - -
Quartz glass FO
cable1
10/125 μm
- - - - - - 15 km 15 km
Quartz glass FO
cable2
50/125 μm
- - - 3 km 3 km 3 km - -
Quartz glass FO
cable2
62.5/125 μm
- - - 3 km 3 km 3 km - -
Number of electrical and optical ports per module, usable fiber types as well as the maximum achievable fiber
-optic cable
distances between two modules. For the precise conditions of use, refer to the section "Technical specifications".
1
Single mode fiber
2Multimode fiber

Description of the device
2.3 Properties and functions
Optical link module
12 Operating Instructions, 01/2020, C79000-G8976-C270-06
Note
BFOC
BFOC stands for Bayonet Fiber Optic Connector. This connector type is functionally
compatible with ST
®connectors. ST is a registered trademark of the AT&T company.
Note
PCF
PFC stands for Polymer Cladded Fiber and is synonymous with HCS
®. HCS®is a trademark
of the Ensign
-Bickford Optics Company.
Basic functions
There is a measurement output available for every channel at which the optical input level
can be measured with a commercially available voltmeter.
The various error and disruption messages of the OLM are available as a group signal via a
signaling contact for further processing. The signaling contact is a relay with floating
contacts.
The individual modes as well as error/fault messages are displayed by several multicolor
LEDs on the front panel of the device, refer to the section "LED display (Page 13)".
The mechanical construction consists of a compact, stable metal housing that can be
mounted either on a DIN rail or on a mounting plate.
The modules are configured using switches that are easily accessible from the outside.
The PROFIBUS OLMs comply with the standard EN 50170 /2/ and with the technical
guideline "Optical transmission technology for PROFIBUS" published by the PROFIBUS
User Organization PNO.
OLM / G12 and OLM / G12-EEC have the same function. They only differ in the specification
of the ambient climatic conditions: While the OLM / G12 is suitable for use in the standard
temperature range from 0 °C to 60 °C, the OLM / G12-EEC (extended environmental
conditions) can be used in the extended temperature range of -25 °C to +60 °C and in up to
100% humidity (condensing).

Description of the device
2.4 Area of application
Optical link module
Operating Instructions, 01/2020, C79000-G8976-C270-06 13
2.4 Area of application
PROFIBUS OLMs are designed for use in optical PROFIBUS fieldbus networks. They allow
the conversion of electrical PROFIBUS interfaces (RS-485 level) into optical PROFIBUS
interfaces and vice versa.
The modules can be integrated in existing PROFIBUS fieldbus networks with the known
advantages of optical transmission technology. A complete PROFIBUS fieldbus network can
also be set up with modules in a linear bus, star or ring topology as well as any combination
of these topologies.
To increase the reliability of the fieldbus network, the redundant ring is supported.
2.5 LED display
2.5.1 Overview
The following figure shows the arrangement of the LEDs.
2.5.2 "SYSTEM" LED
LED color
LED status
Meaning
Signaling contact
- Off •Power supply failed (total failure, in other words with a
redundant power supply failure of both supply voltages)
•Power supply connected incorrectly
•Module fault
Signals
Green Lit The transmission speed was detected and the power supply
is okay
Does not signal

Description of the device
2.5 LED display
Optical link module
14 Operating Instructions, 01/2020, C79000-G8976-C270-06
LED color
LED status
Meaning
Signaling contact
Red Flashing Transmission rate not yet detected because:
•There is no transmitting bus node
•There is no connection to a partner module that is trans-
mitting frames
•Send and receive FO cable swapped over
•Transmission rate does not correspond to the PROFIBUS
standard
•There is only one single active bus node connected that
is only transmitting tokens to itself. After activating a sec-
ond bus node, the display must change (token frames
alone are not enough to set the transmission rate).
•The connected RS-485 segment is only terminated at one
end
•No connection to the master
–FO cable interrupted
–Problem on the RS-485 interface (bus short-circuit)
Does not signal
Red/green Flashing Transmission rate detected but:
•The slot time of the network could not yet be detected
(network parameter HSA set too low, there is no transmit-
ting bus node)
•One optical channel is set to the "redundant optical ring"
mode but the second one is not (this mode must always
be set on both optical channels)
•The slot time of the network is set too low
Does not signal

Description of the device
2.5 LED display
Optical link module
Operating Instructions, 01/2020, C79000-G8976-C270-06 15
2.5.3 LED "CH1"/"CH0" - electrical
LED color
LED status
Meaning
Signaling contact
- Off Bus node is not connected, because:
•Connected bus node is not turned on
•Interruption1of one or both wires of the RS-485 bus cable
•Short-circuit1or ground fault of the wires of the RS-485
bus cable
Does not signal
Yellow
Lit
Signals are being received on the RS-485 bus cable.
Does not signal
Red Flashing/lit Sporadic disturbances because of
•Inadequate shielding of the RS-485 bus cable
•Open bus cable, this means the RS-485 bus cable is only
connected to the module at one end
•RS-485 segment is not terminated or only at one end
•Pulling/plugging an RS-485 bus terminal or terminating
plug
Permanent disturbance due to:
•Wires A and B of the RS-485 bus cable have been
swapped over
•Short-circuit1on the RS-485 bus cable
•Transmission time exceeded due to a bus node in a bus
segment connected to channel 1 or 0
Signals
Permanent disturbance due to:
•Module and another bus node connected over channel 1
or 0, transmit at the same time (e.g. because of duplicate
address assignment or slot time set too low or when can-
celing segmentation in the optical bus, see section "Bus
topology (Page 54)")
•RS-485 driver of the module is faulty (e.g. following a
lightning strike)
Does not signal
1
Depends on the cable length between the RS-485 interface and the problem and on the baud rate.
It can vary from one example to another.

Description of the device
2.5 LED display
Optical link module
16 Operating Instructions, 01/2020, C79000-G8976-C270-06
2.5.4 LED "CH2"/"CH3" - optical
Mode "bus with fiber-optic link monitoring and "redundant optical ring"
LED color
LED status
Meaning
Signaling contact
- Off Transmission rate not yet detected - "System" LED flashes
red
•There is no transmitting bus node
•Send and receive FO cable swapped over
•No partner module connected or partner module is not
turned on
•Connected partner module fault
Does not signal
Transmission rate has been detected - "System" LED lit
green
•If the "redundant optical ring" mode is set, the optical
channel operates as a standby channel. There is no prob-
lem in the OLM or on the fiber-optic cable.
•If one of the modes "bus with fiber-optic link monitoring
..." is set, no PROFIBUS frames are received on the opti-
cal channel. There is no problem in the OLM or on the fi-
ber-optic cable.
Yellow Lit PROFIBUS frames are being received on the optical chan-
nel.
Does not signal
Yellow Flashing Transmission rate has been detected - "System" LED lit
green or flashes red/green
•There is no transmitting bus node (fiber-optic cable link is
okay)
Does not signal
Red Lit •Send and receive FO cable swapped over
•No partner module connected or partner module is not
turned on
•Connected partner module fault
•Transmission time exceeded by the connected partner
module
•Interrupted FO cable
•FO cable section to partner module longer than allowed
•Fiber-optic cable connector has a loose contact
•FO cable fiber is loose in the FO cable plug
•If the channel LED of the two OLMs involved continues to
be lit red even after eliminating a FO cable problem in the
redundant optical ring, check that the setting of the HSA
parameter as described in the section "Ring topology
(Page 59)" is correct
Signals

Description of the device
2.5 LED display
Optical link module
Operating Instructions, 01/2020, C79000-G8976-C270-06 17
LED color
LED status
Meaning
Signaling contact
Red/yellow Flashing •Periodically occurring problem (see above), loose contact
in a FO cable connector
•FO cable fiber is loose in the FO cable plug
•There is only one single active bus node connected that
is only transmitting tokens to itself. After connecting a
second node, there should no longer be an error display
Signals
Red/yellow/off Flashing A periodically changing color (red - yellow - off) at the port
LED in conjunction with a green port level LED indicates
overdrive of this channel. To counteract this, the transmit
power can be reduced, refer to the section "Reducing optical
transmit power (Page 27)".
Signals
Mode "bus without fiber-optic link monitoring"
LED color
LED status
Meaning
Signaling contact
- Off •There is no transmitting bus node
•Send and receive FO cable swapped over
•No partner module connected or partner module is not
turned on
•Connected partner module fault
Does not signal
Yellow Lit PROFIBUS frames are being received on the optical chan-
nel.
Does not signal
2.5.5 LED "CH2-LEVEL"/"CH3-LEVEL"
LED color
LED status
Meaning
Signaling contact
Green
Lit
Receive level adequate, normal operation
Not relevant
Yellow
Lit
Receive level critical, link power margin reduced
Red Lit •Receive level inadequate, function not guaranteed
•Channel not used, no FO cable connected
NOTICE
Mode: LED lit green
If the display of the port level is green in conjunction with a periodically changing color (red
- yellow - off), the relevant port LED, this points to overdrive of this channel. To counteract
this, the transmit power can be reduced, refer to the section "Reducing optical transmit
power (Page 27)".

Optical link module
Operating Instructions, 01/2020, C79000-G8976-C270-06 19
Commissioning
3
Preparation
1. Unpack the OLM and its accessories
2. Check that the consignment is complete and that there has been no damage during
transportation.
3. Allow the device to acclimatize for a time to avoid condensation after storage in cold
surroundings.
4. Select the network topology to suit your situation.
Commissioning the OLM
1. Check the DIL switches and if necessary change the setting.
2. Mount the module.
3. Connect the power supply and if required the signaling contact.
4. Connect the electrical RS-485 bus cables with the bus connector assembled.
Note
Make sure that the terminating
resistors are activated in the connectors at the end of the
bus.
5. Connect the optical bus cables.

Commissioning
Optical link module
20 Operating Instructions, 01/2020, C79000-G8976-C270-06
Factory setting
The figure shows the factory setting of the DIL switches:
●Switches S0, S1, S2, S3, S4, S7 and S8 in position "0"
●Switch S5 and S6 in position "1"