Siemens SIMATIC NET User manual
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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.
Qualied Personnel
The product/system described in this documentation may be operated only by personnel qualied for the specic
task in accordance with the relevant documentation, in particular its warning notices and safety instructions.
Qualied 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 identied 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
C79000-G8976-C333-02
Ⓟ 06/2022 Subject to change
Copyright © Siemens AG 2013 - 2022.
All rights reserved
Preface
Documentation
You will nd information on the use of this product in the following sources:
• in the product documentation
• in the SIMATIC NET PROFIBUS Networks manual
The manual is available on the Internet pages of Siemens Industry Online Support under the
following entry ID:
35222591 (http://support.automation.siemens.com/WW/view/en/35222591)
• in the SIMATIC NET Industrial Communication catalog IK PI
You can request the catalog and additional information from your Siemens representative.
Contact person
If you cannot nd the answer to a technical question about the use of this product in the sources
quoted, contact your Siemens representative in the agencies or oces responsible for your area.
The addresses are listed:
• in our catalog IK PI
• on the Internet pages of Siemens Industry Online Support (http://
support.automation.siemens.com)
Frequently asked questions
Our customer support on the Internet provides useful information and answers to frequently
asked questions. Here you will nd information about the entire product spectrum in the area
Support > FAQs (Frequently Asked Questions): http://www.automation.siemens.com/.
Hotline
Our hotline is also available to deal with problems:
• Phone
0911-895-7222
(from abroad +49-911-895-7222)
• Telefax
0911-895-7223
(from abroad +49-911-895-7223)
• E-mail
12M bus terminal
Operating Instructions, 06/2022, C79000-G8976-C333-02 3
Security information
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 (https://www.siemens.com/industrialsecurity).
Siemens’ products and solutions undergo continuous development to make them more secure.
Siemens strongly recommends that product updates are applied as soon as they are available
and that the latest product versions are used. Use of product versions that are no longer
supported, and failure to apply the latest updates may increase customer’s exposure to cyber
threats.
To stay informed about product updates, subscribe to the Siemens Industrial Security RSS Feed
under
https://www.siemens.com/cert (https://www.siemens.com/cert).
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 certied
disposal company for electronic scrap or your Siemens contact (Product return (https://
support.industry.siemens.com/cs/ww/en/view/109479891)).
Note the dierent national regulations.
Trademarks
The following and possibly other names not identied by the registered trademark sign ® are
registered trademarks of Siemens AG:
SCALANCE, C-PLUG, OLM
Preface
12M bus terminal
4Operating Instructions, 06/2022, C79000-G8976-C333-02
Table of contents
Preface ................................................................................................................................................... 3
1 Introduction ........................................................................................................................................... 7
1.1 Included in shipment ........................................................................................................... 7
1.2 Description of the product.................................................................................................... 7
1.3 Compatible devices............................................................................................................ 10
2 Installation........................................................................................................................................... 11
2.1 Important notes on using the device .................................................................................. 11
2.2 Mounting and attaching the bus cable(s) ........................................................................... 15
2.3 Grounding measures.......................................................................................................... 18
2.4 Disassembly....................................................................................................................... 19
3 Maintenance and cleaning .................................................................................................................. 21
4 Technical specications ....................................................................................................................... 23
5 Approvals............................................................................................................................................. 25
5.1 Note for Australia............................................................................................................... 28
Index .................................................................................................................................................... 31
12M bus terminal
Operating Instructions, 06/2022, C79000-G8976-C333-02 5
Table of contents
12M bus terminal
6Operating Instructions, 06/2022, C79000-G8976-C333-02
Introduction 1
1.1 Included in shipment
• 12M bus terminal order no. 6GK1 500-0AA10
1.2 Description of the product
Function
The 12M bus terminal is used to attach data terminal equipment (DTE) with an RS-485 interface
to a bus cable.
Note
A maximum of 32 12M bus terminals can be connected to one bus segment.
If other components, such as repeaters are connected to a bus segment, this reduces the
maximum number of 12M bus terminals that can be connected.
Operator controls
The bus terminal consists of the following elements and controls:
• 1 terminal block with 6 terminals for wires with a cross-sectional area of ≤ 1.5 mm2
With this terminal block you can connect the incoming and outgoing bus cable and, if
necessary, Protective Earth (PE).
• Screw down clamps for shield contact
12M bus terminal
Operating Instructions, 06/2022, C79000-G8976-C333-02 7
• 2 switches:
– right-hand switch ("Termination")
With the right-hand switch, you can terminate the end of an incoming, electrical segment
(A1, B1) with the characteristic impedance (switch on). At the same time, the outgoing,
electrical segment (A2, B2) is interrupted.
– left-hand switch
With the left-hand switch you can set the range of the transmission speed 9.6 kbps... 1.5
Mbps and 3 Mbps...12 Mbps.
• A 1.5 m long spur line with a 9-pin D-sub male connector
You can connect a DTE directly to this spur line.
3($%$%3(RIIRQRIIRQN0007HUPLQDWLRQ5
Figure 1-1 Operator controls
Terminal block
Short name Meaning
PE Protective earth connected to the cable shield and DIN rail
A1 Signal line A of the incoming segment side
B1 Signal line B of the incoming segment side
A2 Signal line of the outgoing segment side
B2 Signal line of the outgoing segment side
PE Protective earth connected to the cable shield and DIN rail
Terminal block
The following is recommended for PROFIBUS:
• Terminal A - green wire
• Terminal B - red wire
Termination
Activate the termination on the rst and last node of the bus segment.
If termination is activated (termination on), the connection between the incoming (A1, B1) and
outgoing (A2, B2) segment is interrupted. If the wrong bus terminating resistors are activated,
it is no longer possible to access stations downstream from the bus terminal. When a segment
is put into operation, there must therefore be no bus terminating resistors activated that are not
located at the start or end of the network.
Introduction
1.2 Description of the product
12M bus terminal
8Operating Instructions, 06/2022, C79000-G8976-C333-02
D-sub male connector
The D-sub male connector is plugged into the D-sub female connector of the DTE and secured
by screws. The 12M bus terminal requires a current of 90 mA with a voltage of 5 V supplied by
the DTE between pins 5 (M5) and 6 (P5) of the D-sub male connector.
Pin no. Short name Meaning
1 PE Protective earth, connected to the cable shield
2 nc
3 B (RxD/TxD-P) Signal line B
4 nc
5 M5 (DGND) Chassis connection of the 5 volt supply
6 P5 (VP) + 5 volt connection, 90 mA required
7 nc
8 A (RxD/TxD-N) Signal line A
9 nc
Casing PE Protective earth, connected to the cable shield
D-sub male connector pinout
The impedance of the PROFIBUS interface when receiving must be ≥ 10 kilohms (according to
the EIA standard RS-485). The spur line must not be terminated.
Segment length and transmission speed
Transmission speed maximum segment length
9.6 - 187.6 kbps 800 m
500 kbps 400 m
1.5 Mbps 200 m
3 - 12 Mbps 100 m
Permitted segment lengths
Bus cable for PROFIBUS, standard type (see catalog IK PI).
Note
Restriction when using the 12M bus terminal at 500 kbps
This restriction only aects segments longer than 80 m.
If the 12M bus terminal is used at a transmission rate of 500 kbps along with several RS-485 bus
terminals with a spur line length of 3.0 m, a minimum distance of 5 m of PROFIBUS cable must
be maintained between two RS-485 bus terminals.
You can locate 12M bus terminals anywhere in the segment; there is no minimum distance
between them that needs to be kept to. You can also arrange a 12M bus terminal between two
RS-485 bus terminals with 3.0 m spur lines if you make sure that the PROFIBUS cable between
two RS-485 bus terminals has a total length of at least 5 m.
Introduction
1.2 Description of the product
12M bus terminal
Operating Instructions, 06/2022, C79000-G8976-C333-02 9
1.3 Compatible devices
Table 1-1 Connectable devices that can supply 90 mA at 5V.
Name Master slave Comments BT12M can be used
SIMATIC S5
IM 308-C M + S yes
CP 5431 FMS/DP M yes
S5-95U/DP M + S yes
SIMATIC S7-200
CPU 215-DP S yes
CP 242-8 S yes
SIMATIC S7-300
CP 342-5 M + S yes
CP 343-5 M yes
CPU 313/314/315/316 M yes
CPU 315-2 DP M + S yes
SIMATIC S7-400
CP 342-5 M + S yes
CP 413-2 DP M yes
CPU 414-2 DP M yes
PC modules
CP 5412A2 M yes
CP 5411 M yes
CP 5611 M yes
CP 5613 M yes
Distributed I/O
ET 200M S via IM 153 yes
ET 200U S via IM 318-C yes
ET 200B S all versions yes
Miscellaneous
RS-485 repeater - yes
OLM-V3 - yes
DP/RS485 S DP interface module for line
circuit breaker
3WN6 (only 0..60 °)
yes
DP/AS-i Link IP20 S AS-i connection to PROFIBUS
DP,
degree of protection IP20
yes
TI
SIMATIC 505-FIM M Slave SIMATIC 505-6870
PROFIBUS-DP RBC
Master complete SIMATIC 505
series
yes
Introduction
1.3 Compatible devices
12M bus terminal
10 Operating Instructions, 06/2022, C79000-G8976-C333-02
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