Siemens SIMATIC NET 12M Operating Instructions Manual
12M bus terminal
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SIMATIC NET
Network components
12M bus terminal
Operating Instructions
07/2013
C79000
-G8976-C333-01
Preface
Introduction
1
Installation
2
Technical specifications
3
Approvals
4
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Siemens AG
Industry Sector
Postfach 48 48
90026 NÜRNBERG
GERMANY
Order number: C79000-G8976-C333
Ⓟ
08/2013 Technical data subject to change
Copyright © Siemens AG 2013.
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.
12M bus terminal
Operating Instructions, 07/2013, C79000-G8976-C333-01
3
Preface
Documentation
You will find 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 find the answer to a technical question about the use of this product in the
sources quoted, contact your Siemens representative in the agencies or offices 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 find information about the entire product spectrum in the area
Support > FAQs (Frequently Asked Questions): http://www.automation.siemens.com/.
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Preface
12M bus terminal
4 Operating Instructions, 07/2013, C79000-G8976-C333-01
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
support.automation@siemens.com
12M bus terminal
Operating Instructions, 07/2013, C79000-G8976-C333-01
5
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 ...................................................................................................................... 11
2 Installation ............................................................................................................................................ 13
2.1 Important notes on using the device ............................................................................................ 13
2.2 Mounting and attaching the bus cable(s) ..................................................................................... 16
2.3 Grounding measures ................................................................................................................... 19
3 Technical specifications ........................................................................................................................ 21
4 Approvals .............................................................................................................................................. 23
Index..................................................................................................................................................... 27
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Table of contents
12M bus terminal
6 Operating Instructions, 07/2013, C79000-G8976-C333-01
12M bus terminal
Operating Instructions, 07/2013, C79000-G8976-C333-01
7
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.
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Introduction
1.2 Description of the product
12M bus terminal
8 Operating Instructions, 07/2013, C79000-G8976-C333-01
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 mm
2
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
● 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.
Figure 1-1 Operator controls
Introduction
1.2 Description of the product
12M bus terminal
Operating Instructions, 07/2013, C79000-G8976-C333-01
9
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 first 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.
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.
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