4
Cabling the AC 800F
4-62
To ensure RFI suppression in
accordance
with
Class
B
to
DIN/VDE install the ferrite ring RFI
suppressor from Würth-Elektronik,
ordering code 742 701 110. The
requirements of RFI suppression
Class A are always met.
Fig. 4-39 Profibus connector with ferrite-type RFI
suppressor, example
RFI suppression (Class B to DIN/VDE) is only ensured if the Profibus
cable is provided with the ferrite-type RFI suppressor specified
above.
Branch cables
The Profibus provides a wide range of possible transmission rates. The permissible
lengths of possible branch cables depend upon the baud rate used. No branches are
permitted for 12 Mbauds. With transmission rates of max. 1.5 Mbauds the total length
of all branch cables should be less than 6.6 m. When using branches with low baud
rates (
≤
93.75 kbauds), the ratio between branch cable length and next bus
termination should be at least 1:20.
In the past, a commonly used solution were bus terminals with nodes connected via
branches. This configuration, however, is only useful under certain conditions with 1.5
Mbaud transmission and should be avoided with higher transmission rates.
Please note that there is always a cable of several centimeters between a Profibus
connector and the transceiver of a node. When connecting 32 nodes to the bus, an
important total branch cable length will result from this. If you should encounter
transmission problems in your installation although everything works reliably at a low
transmission rate, it is recommended to perform a dynamic bus analysis. This
analysis will reliably detect mismatches.
4.3.1.2
Connecting the Profibus via fiber-optic cables (FO cables)
An off-the-shelf interface converter is needed for the transition from RS485 bus
technology to a fiber-optic cable. An FO cable consist of two glass fiber leads, one for
transmit data and one for receive data.
Usually, the RTS signal on the Profibus connector controls if data is transmitted or
received.
Note that this signal and the VP and GND signals additionally have to be applied to
an interface converter. Observe the instructions in the user manual delivered with
your interface converter.
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 ...
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