4
Cabling the AC 800F
4-59
The
impedances
reduce
line
reflections normally occurring at
each connection point.
The
series
impedances
are
matched with the line parameters
of
the
Profibus
cable
to
be
connected.
Fig. 4-35 Profibus connector, internal circuitry
The bus cable to be used for the bus module is specified in DIN 19245/EN 50170 as
line type A and can be used according to the following table:
Parameters
Line A
Characteristic impedance in
Ω
135 ... 165
Capacitance per unit length (pF/m)
< 30
Loop resistance (
Ω
/km)
110
Wire diameter (mm)
0.64
Cross-sectional area of wire (mm
2
)
> 0.34
From the line parameters specified above result the following bus segment lengths:
Transmission rate in kBit/s
9.6
19.2
93.75
187.5
500
1500
12000
Range in m/segment
1200 1200
1200
1000
400
200
100
If you should wish to use a transmission rate which is not listed in the table above you
can approximately determine the permissible length through linear interpolation of two
adjacent transmission rates from the table.
Example
You are using a transmission rate of 3 Mbauds and would like to determine
approximately the max. line length l
3Mbauds
. The transmission rates in the table close
to this value are 1.5 Mbauds with l
1,5Mbauds
and 12 Mbauds with l
12Mbauds
. Thus,
you can calculate the line length l
3Mbauds
:
l
3M bauds
l
1.5M bauds
.
(
)
,
3M bauds
1. 5M bauds
l
1.5M bauds
l
12M bauds
1,5M bauds
12M bauds
l
3Mbauds
≈
185 m
Summary of Contents for AC 800F
Page 1: ... PROCESS AUTOMATION Freelance 2019 Mounting and Installation Instructions AC 800F Controller ...
Page 2: ......
Page 66: ...3 Mounting the AC 800F 3 38 ...
Page 168: ...4 Cabling the AC 800F 4 102 ...
Page 290: ...7 Functional Description of the Fieldbus Modules 7 36 ...
Page 317: ...10 Approvals certificates 10 1 10 Approvals certificates 10 1 ISO 9001 Fig 10 1 ISO 9001 ...
Page 318: ...10 Approvals certificates 10 2 Fig 10 2 ISO 9001 ...
Page 319: ...10 Approvals certificates 10 3 Fig 10 3 ISO 9001 ...
Page 320: ...10 Approvals certificates 10 4 Fig 10 4 ISO 9001 ...
Page 321: ...10 Approvals certificates 10 5 10 2 ISO 9000 Fig 10 5 ISO 9000 ...
Page 322: ...10 Approvals certificates 10 6 Fig 10 6 ISO 9000 ...
Page 323: ...10 Approvals certificates 10 7 10 3 CE Fig 10 7 CE certificate page 1 ...
Page 324: ...10 Approvals certificates 10 8 Fig 10 8 CE certificate page 2 ...
Page 325: ...10 Approvals certificates 10 9 Fig 10 9 CE certificate page 3 ...
Page 326: ...10 Approvals certificates 10 10 Fig 10 10CE certificate supplement ...
Page 327: ...10 Approvals certificates 10 11 10 4 CSA Fig 10 11 CSA certificate page 1 ...
Page 328: ...10 Approvals certificates 10 12 Fig 10 12 CSA certificate page 2 ...
Page 329: ...10 Approvals certificates 10 13 Fig 10 13 CSA certificate page 3 ...
Page 330: ...10 Approvals certificates 10 14 Fig 10 14 CSA certificate page 4 ...
Page 331: ...10 Approvals certificates 10 15 10 5 UL Fig 10 15 UL certificate ...
Page 332: ...10 Approvals certificates 10 16 Fig 10 16 UL certificate page 2 ...
Page 333: ...10 Approvals certificates 10 17 Fig 10 17 UL certificate page 3 ...
Page 334: ...10 Approvals certificates 10 18 Fig 10 18 UL certificate page 4 ...
Page 335: ...10 Approvals certificates 10 19 10 6 GUS certificate Fig 10 19 GUS certificate ...
Page 369: ...13 Glossary 13 18 Component of the Freelance 2000 System ...
Page 378: ......