Technical data

Types of copper cables
..................................................................................................................................................................................
43–44
Twisted pair wire
......................................................................................................................................................................................................... 43
Coaxial cable
..................................................................................................................................................................................................................... 44
Distance and design
............................................................................................................................................................................................
44–55
Transmission range with different types of cable media and data rates
...................................... 44
Calculation of resistance
...................................................................................................................................................................................
45
Two symbols for capacitance
.................................................................................................................................................................... 45
Cable coding
..................................................................................................................................................................................................................... 46
Fibre Optic Communications .................................................................................................................................................................... 47
Fibre cable
............................................................................................................................................................................................................................ 47
Material ..................................................................................................................................................................................................................................... 48
Attenuation in multimode fibre
............................................................................................................................................................. 48
Multimode
............................................................................................................................................................................................................................
48
Attenuation in singlemode fibre ............................................................................................................................................................
49
Wave length ....................................................................................................................................................................................................................... 49
Light Attenuation in Glass Fibre at different wave lengths
..............................................................................
50
Termination
.........................................................................................................................................................................................................................
51
Loss Budget Calculation
.................................................................................................................................................................................... 52
Example ................................................................................................................................................................................................................................... 52
Local communication
..............................................................................................................................................................................................
56–65
Fieldbuses ...........................................................................................................................................................................................................................
56–57
Fieldbuses
............................................................................................................................................................................................................................... 57
PROFIBUS
............................................................................................................................................................................................................................
58
History ....................................................................................................................................................................................................................................... 58
PROFIBUS communication ..............................................................................................................................................................
58–59
Network topology PROFIBUS
................................................................................................................................................................
59
PROFIBUS DP
................................................................................................................................................................................................................
60
Modbus ..................................................................................................................................................................................................................................... 61
Modbus Plus
......................................................................................................................................................................................................................
62
Modbus/TCP
.....................................................................................................................................................................................................................
62
L
ON
®
W
ORKS
............................................................................................................................................................................................................ 63–65
Large LonTalk
®
network considerations
.................................................................................................................................... 65
Remote Connections
......................................................................................................................................................................................... 66–109
PSTN Dial-up lines
........................................................................................................................................................................................................... 66
Data communication over the telephone network
..................................................................................................
66
Dial-up connection
...................................................................................................................................................................................................
66
Modulation
........................................................................................................................................................................................................................... 67
Is bit/s the same as baud?
...............................................................................................................................................................................
68
Some standards
............................................................................................................................................................................................................
69
V.90
................................................................................................................................................................................................................................................. 69
6 Theoretical and general applications www.westermo.com
OSI model ............................................................................................................................................................................................................................ 53
Structure of the OSI-model ..............................................................................................................................................................
53-54
A comparison ...................................................................................................................................................................................................... 55