SIM 1-2 MAU

SIMATIC NET
ASIC
SIM 1-2
Function Manual












Preface

Area of Application and
Characteristics
1
Functional Description of
the SIM 1-2
2
Technical Specifications
3
Application Examples
4
Putting into Operation
5
Appendix
A















Release 02/2007
C79000-G8976-C215-01
Siemens AG
Automation and Drives
Industrial Communication
Postfach 4848, D-90327 Nürnberg
Copyright © Siemens AG,
C79000-G8976-C215-01
Subject to technical change.
Siemens Aktiengesellschaft

Printed in the Federal Republic of Germany
2


Classification of Safety-Related Notices
This document contains notices which you should observe to ensure your own
personal safety, as well as to protect the product and connected equipment. These
notices are highlighted in the manual by a warning triangle and are marked as follows
according to the level of danger:

Danger
indicates that death, severe personal injury will result if proper precautions are not
taken.


Warning
indicates that death, severe personal injury can result if proper precautions are not
taken.


Caution
with a warning triangle indicates that minor personal injury can result if proper
precautions are not taken.


Caution
without a 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.

Trademarks
SIMATIC®, SIMATIC NET®, SIMATIC NET Networking for Industry®, SINEC®,
SCALANCE® and SINAUT® are 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.
Disclaimer
We have checked the contents of this manual for agreement with the hardware 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 welcome.
SIM 1-2
C79000-G8976-C215-01

3
Safety Instructions Regarding your Product
Before you use the product described here, read the safety instructions below
thoroughly.
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 established
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/EEC.

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.


SIM 1-2

C79000-G8976-C215-01

4
Prior to Commissioning
Prior to commissioning, note the following warning:


Caution
Prior to startup read the relevant documentation. For ordering data of the
documentation, please refer to catalogs or contact your local Siemens representative.



SIM 1-2
C79000-G8976-C215-01
5

Preface
Purpose of manual
This manual supports you during the development of a Fieldbus Medium
Attachment Unit (MAU) for 31.25 Kbps in compliance with IEC 61158-2 with the
SIM 1-2 (Siemens IEC MAU) and a small number of external components.
Which Data Link Layer protocol is implemented is irrelevant. In conjunction with a
suitable communication controller, for example SPC 2-4, devices with a fieldbus
attachment (supplied with power locally or over the bus) can be implemented with
little effort.
This manual serves both as a function manual and as a data sheet for the
developer of the electronics.
Aims
With the aid of this manual, you will be able to develop a fieldbus medium
attachment unit (MAU) for 31.25 Kbps for your application with little effort using the
SIM 1-2.
We assume that you are familiar with the relevant standards and specifications.
Certification
The products and systems listed in this document are manufactured and marketed
using a quality management system complying with DIN ISO 9001 and certified by
DQS (certificate register no. 2613). The DQS certificate is recognized in all IQNet
countries (Reg. No.: 2613).
Preface

SIM 1-2
6
C79000-G8976-C215-01



SIM 1-2
C79000-G8976-C215-01
7

Contents
1

Area of Application and Characteristics ...................................................................... 9

1.1

Overview.............................................................................................................. 9

1.2

Essential Characteristics ................................................................................... 11

2

Functional Description of the SIM 1-2 ........................................................................ 13

2.1

Block Diagram ................................................................................................... 13

2.2

Pin Description................................................................................................... 14

2.2.1

Pin Assignment.................................................................................................. 14

2.2.2

Pin Arrangement................................................................................................ 16

2.3

Basic Functions of the SIM 1-2.......................................................................... 17

2.3.1

Interfacing with the Bus Cable: VBUS and GND............................................... 17

2.3.2

Control Loop: CTR............................................................................................. 17

2.3.3

Current Sensing by SENSEP and SENSEM..................................................... 17

2.3.4

Bus Connector ................................................................................................... 18

2.3.5

Receiver Input: RXIN ......................................................................................... 20

2.3.6

Impedance Converter Output/Input: VE/VESRD............................................... 20

2.3.7

Reference Circuit RIREF, RVCCVE, RVREG, RISOLL .................................... 20

2.3.8

Interface and Application Voltage VREG........................................................... 21

2.3.9

Internal Power Supply: VCCD/VCCA, VM......................................................... 21

2.3.10

Oscillator: XT0, XT1........................................................................................... 21

2.3.11

Digital Interface: TXE, TXS, RXA, RXS............................................................. 22

2.3.12

Test and Manufacturing Pins: TD, T0, T1, T2, TA............................................. 22

2.3.13

Mode Setting GIM and VCM.............................................................................. 22

2.3.14

Voltage Monitoring............................................................................................. 23

2.4

Power Supply of the Application........................................................................ 24

2.4.1

Power Supply VREG ......................................................................................... 24

2.4.2

Power Supply VE............................................................................................... 25

2.4.3

DC/DC Converters S1 and S2........................................................................... 26

2.4.4

Dimensioning the Backup Capacitor ................................................................. 27

2.5

Internal Functions .............................................................................................. 28

2.5.1

Impedance Converter ........................................................................................ 28

2.5.2

Shunt Regulator................................................................................................. 28

2.5.3

Signal Filter..................................................