Siemens SIMATIC NET MM900 Series Administrator guide

SIMATIC NET
Industrial Ethernet switches
MM900 media modules for
SCALANCE XR-500M
Compact Operating Instructions
04/2022
A5E03275846-05
Introduction 1
Safety notes 2
Recommendations on
network security 3
Device description 4
installing and removing 5
Connecting 6
Service and maintenance 7
Technical data 8
Dimension drawings 9
Approvals 10

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.
Quali󹪝ed Personnel
The product/system described in this documentation may be operated only by personnel quali󹪝ed for the speci󹪝c
task in accordance with the relevant documentation, in particular its warning notices and safety instructions.
Quali󹪝ed 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 identi󹪝ed 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.
Siemens AG
Digital Industries
Postfach 48 48
90026 NÜRNBERG
GERMANY
Document order number: A5E03275846-05
Ⓟ 03/2022 Subject to change
Copyright © Siemens AG 2011 - 2022.
All rights reserved

Table of contents
1 Introduction ........................................................................................................................................... 5
2 Safety notes ........................................................................................................................................... 7
3 Recommendations on network security................................................................................................ 9
4 Device description ............................................................................................................................... 15
5 installing and removing....................................................................................................................... 17
5.1 Safety notices for installation ............................................................................................. 17
5.2 Disassembly....................................................................................................................... 23
6 Connecting .......................................................................................................................................... 25
6.1 Safety when connecting up................................................................................................ 25
6.2 Connecting a media module .............................................................................................. 27
7 Service and maintenance .................................................................................................................... 29
8 Technical data...................................................................................................................................... 31
8.1 Mechanical and electrical data ........................................................................................... 31
8.2 Cable lengths of the MM900 media modules for SCALANCE XR-500M ................................ 33
8.3 Other properties ................................................................................................................ 34
9 Dimension drawings............................................................................................................................ 37
10 Approvals............................................................................................................................................. 39
Index .................................................................................................................................................... 47
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Table of contents
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Introduction 1
Purpose of the compact operating instructions
Based on the compact operating instructions, you will be able to install and connect up the
MM900 media module correctly.
Validity of these compact operating instructions
These compact operating instructions apply to the MM900 product group of the
SCALANCE X‑500 product line as of product version 1:
• MM991-4
• MM991-4LD
• MM992-4
• MM992-4LD
• MM992-4SFP
• MM992-4CU
• MM992-4CUC
• MM992-4PoE
• MM992-4PoEC
Note
Additional literature
When working with media modules, you should also read the compact operating instructions of
the SCALANCE XR-500M product group.
You will 󹪝nd the operating instructions of the SCALANCE XR-500M product group on the
supplied CD.
SIMATIC NET glossary
Explanations of many of the specialist terms used in this documentation can be found in the
SIMATIC NET glossary.
You will 󹪝nd the SIMATIC NET glossary here:
• SIMATIC NET Manual Collection or product DVD
The DVD ships with certain SIMATIC NET products.
• On the Internet under the following address:
50305045 (https://support.industry.siemens.com/cs/ww/en/view/50305045)
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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. 󹪝rewalls 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 (http://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 (http://www.siemens.com/industrialsecurity)
Device defective
If a fault develops, send the device to your SIEMENS representative for repair. Repairs on-site are
not possible.
Recycling and disposal
The products are low in pollutants, can be recycled and meet the requirements of the WEEE
directive 2012/19/EU for the disposal of electrical and electronic equipment.
Do not dispose of the products at public disposal sites.
For environmentally friendly recycling and the disposal of your old device contact a certi󹪝ed
disposal company for electronic scrap or your Siemens contact (Product return (https://
support.industry.siemens.com/cs/ww/en/view/109479891)).
Note the di󹪜erent national regulations.
Introduction
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Safety notes 2
Read the safety notices
Note the following safety notices. These relate to the entire working life of the device.
You should also read the safety notices relating to handling in the individual sections,
particularly in the sections "Installation" and "Connecting up".
CAUTION
To prevent injury and damage, read the manual before using the device.
Safety notices on use in hazardous areas
General safety notices relating to protection against explosion
WARNING
EXPLOSION HAZARD
Do not open the device when the supply voltage is turned on.
Safety notices when using the device according to Hazardous Locations (HazLoc)
If you use the device under HazLoc conditions you must also keep to the following safety notices
in addition to the general safety notices for protection against explosion:
This equipment is suitable for use in Class I, Division 2, Groups A, B, C and D or non-hazardous
locations only.
This equipment is suitable for use in Class I, Zone 2, Group IIC or non-hazardous locations only.
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Safety notes
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Recommendations on network security 3
NOTICE
Information security
Connect to the device and change the standard password for the user set in the factory "admin"
and "" before you operate the device.
To prevent unauthorized access to the device and/or network, observe the following security
recommendations.
General
• Check the device regularly to ensure that these recommendations and/or other internal
security policies are complied with.
• Evaluate the security of your location and use a cell protection concept with suitable products
(https://www.industry.siemens.com/topics/global/en/industrial-security/pages/
default.aspx).
• When the internal and external network are disconnected, an attacker cannot access internal
data from the outside. Therefore operate the device only within a protected network area.
• No product liability will be accepted for operation in a non-secure infrastructure.
• Use VPN to encrypt and authenticate communication from and to the devices.
• For data transmission via a non-secure network, use an encrypted VPN tunnel (IPsec,
OpenVPN).
• Separate connections correctly (WBM, SSH etc.).
• Check the user documentation of other Siemens products that are used together with the
device for additional security recommendations.
• Using remote logging, ensure that the system protocols are forwarded to a central logging
server. Make sure that the server is within the protected network and check the protocols
regularly for potential security violations or vulnerabilities.
Physical access
• Restrict physical access to the device to quali󹪝ed personnel.
– The memory card or the PLUG (C-PLUG, KEY-PLUG) contains sensitive data such as
certi󹪝cates, keys etc. that can be read out and modi󹪝ed.
– Using the button, you can reset the device to the factory defaults.
• If the device is publicly accessible, disable the functions of the button using the software.
• Lock unused physical ports on the device. Unused ports can be used to gain forbidden access
to the plant.
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Software (security functions)
• Keep the 󹪝rmware up to date. Check regularly for security updates for the device. You can
󹪝nd information on this at the Industrial Security (https://www.siemens.com/
industrialsecurity) website.
• Inform yourself regularly about security recommendations published by Siemens
ProductCERT (https://www.siemens.com/cert/en/cert-security-advisories.htm).
• Only activate protocols that you require to use the device.
• Restrict access to the management of the device with rules in an access control list (ACL).
• The option of VLAN structuring provides protection against DoS attacks and unauthorized
access. Check whether this is practical or useful in your environment.
• Use a central logging server to log changes and accesses. Operate your logging server within
the protected network area and check the logging information regularly.
Authentication
Note
Accessibility risk - Risk of data loss
Do not lose the passwords for the device. Access to the device can only be restored by resetting
the device to factory settings which completely removes all con󹪝guration data.
• Replace the default passwords for all user accounts, access modes and applications (if
applicable) before you use the device.
•De󹪝ne rules for the assignment of passwords.
• Use passwords with a high password strength. Avoid weak passwords, (e.g. password1,
123456789, abcdefgh) or recurring characters (e.g. abcabc).
This recommendation also applies to symmetrical passwords/keys con󹪝gured on the device.
• Make sure that passwords are protected and only disclosed to authorized personnel.
• Do not use the same passwords for multiple user names and systems.
• Store the passwords in a safe location (not online) to have them available if they are lost.
• Regularly change your passwords to increase security.
• A password must be changed if it is known or suspected to be known by unauthorized
persons.
• When user authentication is performed via RADIUS, make sure that all communication takes
place within the security environment or is protected by a secure channel.
• Watch out for link layer protocols that do not o󹪜er their own authentication between
endpoints, such as ARP or IPv4. An attacker could use vulnerabilities in these protocols to
attack hosts, switches and routers connected to your layer 2 network, for example, through
manipulation (poisoning) of the ARP caches of systems in the subnet and subsequent
interception of the data tra󹪟c. Appropriate security measures must be taken for non-secure
layer 2 protocols to prevent unauthorized access to the network. Physical access to the local
network can be secured or secure, higher layer protocols can be used, among other things.
Recommendations on network security
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Certi󹪝cates and keys
• There is a preset SSL/TLS (RSA) certi󹪝cate with 2048 bit key length in the device. Replace this
certi󹪝cate with a user-generated, high-quality certi󹪝cate with key. Use a certi󹪝cate signed by
a reliable external or internal certi󹪝cation authority. You can install the certi󹪝cate via the
WBM ("System > Load and Save").
• Use certi󹪝cates with a key length of 4096 bits.
• Use the certi󹪝cation authority including key revocation and management to sign the
certi󹪝cates.
• Make sure that user-de󹪝ned private keys are protected and inaccessible to unauthorized
persons.
• If there is a suspected security violation, change all certi󹪝cates and keys immediately.
• Use password-protected certi󹪝cates in the format "PKCS #12".
• Verify certi󹪝cates based on the 󹪝ngerprint on the server and client side to prevent "man in the
middle" attacks. Use a second, secure transmission path for this.
• Before sending the device to Siemens for repair, replace the current certi󹪝cates and keys with
temporary disposable certi󹪝cates and keys, which can be destroyed when the device is
returned.
Secure/non-secure protocols and services
• Avoid or disable non-secure protocols and services, for example HTTP, Telnet and TFTP. For
historical reasons, these protocols are available, however not intended for secure
applications. Use non-secure protocols on the device with caution.
• Check whether use of the following protocols and services is necessary:
– Non authenticated and unencrypted ports
– MRP, HRP
– IGMP snooping
– LLDP
– Syslog
– RADIUS
– DHCP Options 66/67
– TFTP
– GMRP and GVRP
Recommendations on network security
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• The following protocols provide secure alternatives:
– HTTP → HTTPS
– Telnet → SSH
– SNMPv1/v2c → SNMPv3
Check whether use of SNMPv1/v2c. is necessary. SNMPv1/v2c is classi󹪝ed as non-secure.
Use the option of preventing write access. The device provides you with suitable setting
options.
If SNMP is enabled, change the community names. If no unrestricted access is necessary,
restrict access with SNMP.
Use the authentication and encryption mechanisms of SNMPv3.
• Use secure protocols when access to the device is not prevented by physical protection
measures.
• If you require non-secure protocols and services, operate the device only within a protected
network area.
• Restrict the services and protocols available to the outside to a minimum.
• For the DCP function, enable the "Read Only" mode after commissioning.
• If you use RADIUS for management access to the device, activate secure protocols and
services.
Interfaces security
• Disable unused interfaces.
• Use IEEE 802.1X for interface authentication.
• Use the function "Locked Ports" to block interfaces for unknown nodes.
• Use the con󹪝guration options of the interfaces, e.g. the "Edge Type".
•Con󹪝gure the receive ports so that they discard all untagged frames ("Tagged Frames Only").
Available protocols
The following list provides you with an overview of the open protocol ports.
The table includes the following columns:
•Protocol
•Port
•Default port status
– Open
The factory setting of the port is "Open".
– Closed
The factory setting of the port is "Closed".
Recommendations on network security
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•Con󹪝gurable port
– ✓
The port status can be changed.
– --
The port status cannot be changed.
•Authentication
Speci󹪝es whether the communication partner is authenticated.
•Encryption
Speci󹪝es whether or not the transfer is encrypted.
Protocol Protocol/
Port number
Default port status Con󹪝gurable port Authentication Encryption
DHCPv4 Server UDP/67 Closed ✓ No No
DHCPv4 Client UDP/68 Open ✓ No No
DHCPv6 IPv6 UDP/546 Closed ✓ No No
EtherNet/IP TCP/44818
UDP/2222
UDP/44818
Closed ✓ No No
HTTP TCP/80 Open ✓ Yes No
HTTPS TCP/443 Open ✓ Yes Yes
MSDP TCP/639 Closed ✓ No No
NTP
SNTP
UDP/123 Closed ✓ No No
NTP (secure) UDP/123 Closed ✓ Yes No
PROFINET UDP/34964,
UDP/49151
… 491591)
Open ✓ No No
RADIUS UDP/
1812,1813
Closed ✓ Yes Yes
RIP UDP/520 Closed -- No No
RIPng IPv6 UDP/521 Closed ✓ No No
SMTP TCP/25
TCP/465
Closed ✓ Yes Yes
SNMP UDP/161 Open ✓ Yes Yes (when con󹪝g‐
ured)
SSH TCP/22 Open ✓ Yes Yes
Syslog UDP/514 Closed ✓ Yes Yes
TELNET TCP/23 Open ✓ Yes No
TFTP UDP/69 Open -- No No
VRRP TCP/50000 Open, 󹪝ltered -- No No
1) Port number can be con󹪝gured via the WBM.
Recommendations on network security
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Recommendations on network security
MM900 media modules for SCALANCE XR-500M
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Device description 4
Article numbers
Type Properties Article number
MM991-4 4 x 100 Mbps, ST ports optical, multimode 󹪝ber-op‐
tic cable, up to max. 5 km.
6GK5 991-4AB00-8AA0
MM991-4LD 4 x 100 Mbps, ST ports optical, single mode 󹪝ber-
optic cable, up to max. 26 km.
6GK5 991-4AC00-8AA0
MM992-4 4 x 1000 Mbps, SC ports optical, multimode FO ca‐
ble, up to max. 750 m.
6GK5 992-4AL00-8AA0
MM992-4LD 4 x 1000 Mbps, SC ports optical, single mode FO
cable, up to max. 10 km.
6GK5 992-4AM00-8AA0
MM992-4SFP 4 x 100 / 1000 Mbps, SFP media module 6GK5 992-4AS00-8AA0
MM992-4CU 4 x 10/100/1000 Mbps, RJ-45 ports electrical 6GK5 992-4SA00-8AA0
MM992-4CUC 4 x 10/100/1000 Mbps, RJ-45 ports electrical with
securing collars
6GK5 992-4GA00-8AA0
MM992-4PoE 4 x 10/100/1000 Mbps, PoE ports electrical, max 60
W
6GK5 992-4QA00-8AA0
MM992-4PoEC 4 x 10/100/1000 Mbps, PoE ports electrical with se‐
curing collars, max 60 W
6GK5 992-4RA00-8AA0
Structure of the type designation
The type designation an MM900 media module for SCALANCE X-500 consists of several parts
with the following meaning:
MM99 -
Interface
Number of ports
1100 Mbps
21000 Mbps
Interface Property
CU 10/100/1000 Mbps RJ-45 port electrical.
CUC 10/100/1000 Mbps RJ-45 port electrical with securing collar.
SFP 100/1000 Mbps SFP media module.
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Interface Property
[-] 100 Mbps ST port optical, multimode 󹪝ber-optic cables,
up to max. 3 km.
1000 Mbps SC port optical, multimode 󹪝ber-optic cables,
up to max. 750 m.
LD 100 Mbps ST port optical, single mode 󹪝ber-optic cables,
up to max. 26 km.
1000 Mbps SC port optical, single mode 󹪝ber-optic cable,
up to max. 10 km.
PoE 10/100/1000 Mbps PoE port electrical, max. 60 W.
PoEC 10/100/1000 Mbps PoE port electrical, with securing collar, max. 60 W.
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
speci󹪝cation.
If you use damaged parts, this can lead to the following problems:
• Injury to persons
• Loss of the approvals
• Violation of the EMC regulations
Use only undamaged parts.
1. Make sure that the package is complete.
2. Check all the parts for transport damage.
If the consignment is incomplete or if there is damage to the exterior, contact your supplier or
your local Siemens o󹪟ce.
Components of the product
The following components are supplied with an MM900 media module:
• MM900 media module
• Compact operating instructions
Device description
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installing and removing 5
5.1 Safety notices for installation
Safety notices
When installing the device, keep to the safety notices listed below.
WARNING
If a device is operated in an ambient temperature of more than 40 °C, the temperature of the
device housing may be higher than 70 °C. The device must therefore be installed so that it is
only accessible to service personnel or users that are aware of the reason for restricted access
and the required safety measures at an ambient temperature higher than 40 ℃.
WARNING
If the device is installed in a cabinet, the inner temperature of the cabinet corresponds to the
ambient temperature of the device.
NOTICE
Improper mounting
Improper mounting may damage the device or impair its operation.
• Before mounting the device, always ensure that there is no visible damage to the device.
• Mount the device using suitable tools. Observe the information in the respective section
about mounting.
Safety notices on use in hazardous areas
General safety notices relating to protection against explosion
WARNING
EXPLOSION HAZARD
Replacing components may impair suitability for Class 1, Division 2 or Zone 2.
WARNING
The device is intended for indoor use only.
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WARNING
The device may only be operated in an environment of contamination class 1 or 2 (see EN/IEC
60664-1, GB/T 16935.1).
WARNING
When used in hazardous environments corresponding to Class I, Division 2 or Class I, Zone 2,
the device must be installed in a cabinet or a suitable enclosure.
Notes for use in hazardous locations according to ATEX, IECEx, UKEX and CCC Ex
If you use the device under ATEX, IECEx, UKEX or CCC Ex conditions you must also keep to the
following safety instructions in addition to the general safety instructions for protection against
explosion:
WARNING
To comply with EU Directive 2014/34 EU (ATEX 114), UK-Regulation SI 2016/1107 or the
conditions of IECEx or CCC-Ex, the housing or cabinet must meet the requirements of at least
IP54 (according to EN/IEC 60529, GB/T 4208) in compliance with EN IEC/IEC 60079‑7, GB
3836.8.
WARNING
Requirements for the cabinet/enclosure
The 󹪝ber-optic bus connections labeled SCALANCE MM400 (see type plate) may also be led
through a hazardous area zone1 (see chapterApprovals (Page 39), section "ATEX").
WARNING
If the temperature of the cable or housing socket exceeds 70 °C or the branching point of
conductors exceeds 80 °C, special precautions must be taken. If the equipment is operated in
an air ambient in excess of 50 °C to 60 °C, only use cables with a permissible operating
temperature of at least 85 °C.
installing and removing
5.1 Safety notices for installation
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Additional notes
CAUTION
Use only approved components
If you use components and accessories that are not approved for SIMATIC NET devices or their
target systems, this may violate the requirements and regulations for safety and
electromagnetic compatibility.
Only use components approved for the SIMATIC NET devices.
NOTICE
Warming and premature aging of the IE switch due to direct sunlight
Direct sunlight can heat up the device and can lead to premature aging of the IE switch and its
cabling.
Provide suitable shade to protect the IE switch against direct sunlight.
Note
During installation and operation, keep to the installation guidelines and safety notices
described in this document and in the system manuals "Industrial Ethernet / PROFINET Industrial
Ethernet" and "Industrial Ethernet / PROFINET passive network components".
You will 󹪝nd information on the system manuals in the section "Introduction", under "Further
documentation".
installing and removing
5.1 Safety notices for installation
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Connecting media modules and SFP transceivers
CAUTION
Remember the orientation of media modules
On modular devices, there are always two module slots arranged opposite each other.
Remember the correct orientation when installing MM900 media modules.
Example:
• The 󹪝rst MM900 media module is installed in slot 3.
• The second MM900 media module installed in slot 4 must be turned through 180 degrees.
On modular devices for rack mounting, pairs of module slots are located one above the other
in which modules can be inserted in a speci󹪝c order:
Example of a rack device:
• The 󹪝rst MM900 media module is installed in slot 1.
• The second MM900 media module installed in slot 7 must be turned through 180 degrees.
Other modules are then inserted in slots 2 and 8 or 3 and 9 etc.
The permitted operating temperature is decided by the fully equipped device (switch +
media module + SFP transceiver).
With modular devices, it is not only the switch that decides the permitted operating
temperature of the overall device but also the temperature ranges of the MM900 media
modules and the SFP transceivers. You will 󹪝nd details in the technical speci󹪝cations of the
relevant components.
The following aspects can restrict the maximum permitted operating temperature:
• The orientation of the carrier device.
• The use of SFP transceivers.
• The use of transceivers of the types LH, LH+ or ELH.
NOTICE
Failure of the data tra󹪟c due to contamination of optical plug-in connections
Optical sockets and plugs are sensitive to contamination of the end face. Contamination can
lead to the failure of the optical transmission network.
Close unused optical sockets and plugs as well as pluggable transceivers and slots with the
supplied protective caps.
Remove the protective caps only immediately before you use the plug-in connection.
NOTICE
Use only approved SFPs
If you use components not approved by Siemens AG, in particular SFPs, Siemens cannot accept
any responsibility for the correct functioning of the "Ethernet switch system" according to the
speci󹪝cation.
Moreover, if components are used that have not been Siemens approved, Siemens cannot
vouch for their compatibility or for risk-free use of these components.
installing and removing
5.1 Safety notices for installation
MM900 media modules for SCALANCE XR-500M
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