Siemens 7SG11 Technical Manual page 43

Contents
1 Introduction ........................................................................................................................................................ 3
2 Connection specification and relay settings ....................................................................................................... 3
2.1. Recommended cable ..................................................................................Error! Bookmark not defined.
2.2. Connection Method.................................................................................................................................... 3
2.3. Transmission Method................................................................................................................................. 3
2.4. Transmission Rate ..................................................................................................................................... 3
2.5. Line Idle Setting ......................................................................................................................................... 3
2.6. Parity Setting ............................................................................................................................................. 4
2.7. Address Setting ......................................................................................................................................... 4
3 Modems ............................................................................................................................................................. 5
3.1 Connecting a modem to the relay(s) .......................................................................................................... 5
3.2 Setting the Remote Modem ....................................................................................................................... 5
3.3 Connecting to the remote modem.............................................................................................................. 5
Figures
Figure 1 - Basic Communications Configuration..................................................................................................6
Figure 2 - Basic Communications Configuration (Remote)..................................................................................6
Figure 3 - Star Type Configuration (Multiplexer).................................................................................................7
Figure 4 - Data Concentrator Configuration........................................................................................................7
Figure 5 - Optical Ring Configuration .................................................................................................................8
Figure 6 - Configuration using the Sigma 3 – Dual Port RS232 Device..............................................................8
Glossary
Baud Rate
Bit
Bits Per Second (BPS)
Data Bits
Half-Duplex
Asynchronous
Communications
Hayes 'AT'
Master Station
Modem
Parity
Parity Bit
Primary Station
PSTN
RS232C
Secondary Station
Slave Station
Start Bit
Stop Bit
©2011 Siemens Protection Devices Limited
See bits per second.
The smallest measure of computer data.
Measurement of data transmission speed.
A number of bits containing the data. Sent after the start bit.
Communications in two directions, but only one at a time.
Modem command set developed by Hayes Microcomputer products, Inc.
See primary station.
MOdulator / DEModulator device for connecting computer equipment to a
telephone line.
Method of error checking by counting the value of the bits in a sequence, and
adding a parity bit to make the outcome, for example, even.
Bit used for implementing parity checking. Sent after the data bits.
The device controlling the communication.
Public Switched Telephone Network
Serial Communications Standard. Electronic Industries Association
Recommended Standard Number 232, Revision C.
The device being communicated with.
See secondary station.
Bit (logical 0) sent to signify the start of a byte during data transmission.
Bit (logical 1) sent to signify the end of a byte during data transmission.
7SG11 Argus 8 Communication Interface
Chapter 4 Page 2 of 8