Siemens SINAUT ST7 - Overview;Mounting and Installation

Contents
© Siemens AG 2002 All Rights Reserved 6NH7811-0AA22
MD2 Modem (07/2002) v
Contents
Overview........................................................................................................................................................1-1
1.1 Areas of Application......................................................................................................1-2
1.2 Main Features ................................................................................................................1-3
1.3 Compatibility to SINAUT ST1 Modems......................................................................1-4
1.4 Standard Cables ............................................................................................................1-5
1.5 Certification and CE Labeling......................................................................................1-6
1.5.1 Certification Provisions .................................................................................................1-6
1.5.2 Notes about CE Labeling..............................................................................................1-8
Mounting and Installation..........................................................................................................................2-1
2.1 Design of the MD2 Modem ..........................................................................................2-2
2.1.1 Front View of an MD2 with Closed Front Doors .......................................................2-2
2.1.2 LED Display of the MD2................................................................................................2-3
2.1.3 Front View of an MD2 with Removed Front Doors...................................................2-4
2.1.4 Pin Assignments for the RS232 and RS485 Ports...................................................2-5
2.1.5 Standard Cables for the RS232 and RS485 Ports...................................................2-6
2.1.6 View of the MD2 Modem from Above.........................................................................2-9
2.1.7 Settings for the DIL Switches Accessible from Above .............................................2-9
2.1.8 View of the MD2 Modem from Below.........................................................................2-17
2.1.9 DIL Switch for Activating the RS232 or RS485 Port................................................2-18
2.1.10 DIL Switch for Activating Terminating Resistors (WAN)..........................................2-18
2.1.11 Pin Assignments on the RJ12 Western Socket........................................................2-19
2.1.12 Standard Cable for the RJ12 Port...............................................................................2-20
2.2 Connecting an MD2 to DTE, LTOP and Dedicated Line.........................................2-21
2.2.1 Connecting an MD2 with a DTE via the RS232 Port...............................................2-21
2.2.2 Connecting Several MD2s with a DTE via the RS485 Port....................................2-24
2.2.3 Connecting Two MD2s to Function as a Repeater..................................................2-27
2.2.4 Transmission Speeds and Frequencies of the MD2 Modem .................................2-28
2.2.5 Signal Loss Values ........................................................................................................2-29
2.2.6 Maximum Range (km)...................................................................................................2-29
2.2.7 Determination of the receive level...............................................................................2-31
2.3 LTOP Line Transformer with Overvoltage Protection..............................................2-32
2.3.1 Design..............................................................................................................................2-32
2.3.2 Connecting the MD2 Modem.......................................................................................2-34
2.4 Mounting..........................................................................................................................2-37
2.4.1 Mounting on an S7-300 Mounting Rail.......................................................................2-37
2.4.2 Mounting on a Standard 35mm Mounting Rail.........................................................2-38
2.4.3 Horizontal and Vertical Mounting................................................................................2-39
2.4.4 Connecting to the Power Supply.................................................................................2-40