Agilent Technologies DP111 Dokumentacja Strona 285

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Appendix A Hardware Units CI851 and TP851 – PROFIBUS DP Interface
3BSE036351-510 A 285
ABB recommends the use of connectors with built-in termination since the fieldbus
will always be terminated even if fully disconnected from the unit.
Functional Block Diagram
Figure 69. Block Diagram – CI851
CI851 has been replaced by the CI854 communication interface. CI851 is only
described for legacy reasons.
Bus interface
Communication unit
AnyBus -M PROFIBUS-DP
+5 V
+24 V
Communication Extension Unit
Communication Extension Baseplate
Communication line
Communication
Extension Bus
Communication
Extension Bus
DC/DC
converter
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