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are terminated in the two SH terminals and they must be bridged to ensure a
continuous shield connection in case the fieldbus plug is removed from the FCI.
Keep the drain wires as short as possible (< 50mm). If the unit is at the end of the
bus, a terminator (TK501Vxxx) must be connected. Please refer to the
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The PROFIBUS-DP fieldbus is connected to the terminals of a CI830. The
incoming fieldbus cable is connected to a 9 pin D-way connector. If the unit is at the
end of the bus, a connector with termination must be used. Please refer to relevant
PROFIBUS documentation.
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The TB820 ModuleBus Modem of an I/O cluster is connected to the CI810/CI830
FCI or TB815 Interconnection Unit by Optical Expansion cables. The optical
ModuleBus can be a simplex, duplex or mixed design.
Optical cable length between each cluster must not exceed 15 meters with plastic
fiber cable and 200 meters with glass fiber cable.
Refer to
Section 3.1.1.3, TB820 ModuleBus Modem
for optical ModuleBus
configurations.
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The MTUs are joined to the I/O modules with plug-in connectors. An MTU can be
extended to another MTU by using a ModuleBus extension cable. The following
instructions apply:
Cable length and ModuleBus length must not exceed 2.5 meters.
Cable routing in cabinets, see
Section 2.2.3, Cable Routing in Enclosures
.
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Process signals are connected to the MTUs according to site installation drawings.
The following instructions also should apply:
•
Cable routing in cabinets, see
Section 2.2.3, Cable Routing in Enclosures
.
•
Grounding of cable shields and Process signals, see
Section 2.2.2, Grounding
in enclosures
.
A carefully done electrical installation is the basis for future interference-free
operation.
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