Siemens SINAUT ST7 - 5.1 Network Configurations with RS232

Network Configurations
6NH7811-0AA22 © Siemens AG 2002 All Rights Reserved
5-2 MD2 Modem (07/2002)
Introduction
The MD2 modem can be used to build a variety of network configurations.
These include the following types of networks:
• Point-to-point
• Multidrop line
• Star network
• Repeater
In the following sections these network configurations are described with graphic
examples and the corresponding DIL switch settings on the individual modems are
explained along with the switch settings on the LTOP overvoltage protection
modules.
5.1 Network Configurations with RS232
The following table provides an overview of the network configurations that can be
built using the RS232 interface.
Table 5-1 Overview of network configurations with RS232
Network
Configuration
Modem Operating
Mode
Transmission
Type
Section
Point-to-point Normal 4-wire full-duplex 5.1.1
Point-to-point Normal 2-wire half-duplex 5.1.2
Multidrop line Normal 4-wire full-duplex 5.1.3
Multidrop line Normal 2-wire half-duplex 5.1.4
Star network via
integrated two-way
transformer
Normal 2-wire half-duplex 5.1.5
Star network via
external multiple
transformer
Normal 2-wire half-duplex 5.1.6
Star network via
external multiple
transformer
Normal 4-wire full-duplex 5.1.7
Repeater Repeater 4-wire full-duplex 5.1.8
Repeater Repeater 2-wire half-duplex 5.1.9