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6
Functional Description of the Ethernet Modules
6-17
6.4
AUI module EI 802F
When using the Ethernet module EI 802F together with the CPU
board PM 803F no battery buffering is ensured. Use the module
EI 812F instead.
6.4.1
Concept
This section aims at giving you some module-specific characteris-
tics. For general features and handling instructions that are com-
mon to all Ethernet modules please refer to Section 6.1.
The AUI module is designed for connecting the AC 800F to the
system bus. It is used for installations where a 10Base2 cabling is
not sufficient due to the required performance or EMC, or if an al-
ready existing cabling needs to be considered.
Contrary to the 10Base2 module, the so-called MAU (Medium At-
tachment Unit) - better known under the name transceiver - is not
located on the module. The standardized AUI interface of the AUI
module, however, allows you to connect any off-the-shelf trans-
ceiver. With this, any Ethernet medium connected via these trans-
ceivers will be available.
A LAN controller is the heart of the EI 802F module. Its special
hardware interface is adapted to the CPU board processor in an
optimal way. The LAN controller provides for the entire preproc-
essing of the transmit and receive data in accordance with the
Ethernet standard. As a result, only the net data is communicated
through the CPU board (via DMA), and a considerable load is
taken off the main processor. The synchronization with the main
processor is realized through the DMA control signals and interrupt
signals.
The standardized AUI interface has no electrically isolated output. The
electrical isolation is realized in the connected transceiver.
Содержание AC 800F
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Страница 66: ...3 Mounting the AC 800F 3 38 ...
Страница 168: ...4 Cabling the AC 800F 4 102 ...
Страница 290: ...7 Functional Description of the Fieldbus Modules 7 36 ...
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Страница 323: ...10 Approvals certificates 10 7 10 3 CE Fig 10 7 CE certificate page 1 ...
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Страница 325: ...10 Approvals certificates 10 9 Fig 10 9 CE certificate page 3 ...
Страница 326: ...10 Approvals certificates 10 10 Fig 10 10CE certificate supplement ...
Страница 327: ...10 Approvals certificates 10 11 10 4 CSA Fig 10 11 CSA certificate page 1 ...
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Страница 331: ...10 Approvals certificates 10 15 10 5 UL Fig 10 15 UL certificate ...
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Страница 335: ...10 Approvals certificates 10 19 10 6 GUS certificate Fig 10 19 GUS certificate ...
Страница 369: ...13 Glossary 13 18 Component of the Freelance 2000 System ...
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