ABB PP885, Руководство по аппаратному обеспечению и установке

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Section 7 Additional Installation Tips
Ethernet Connection in the Operator Panel
Ethernet Connection in the Operator Panel
1
2
3
4
5
RJ45
RJ45
RJ45
RJ45
RJ45
RJ45
RJ45
RJ45
Industrial Ethernet
Operator panel
Operator panel
Operator panel
Operator panel
Shielded
Short and
unshielded
0.1 μ F
250 V
1-1
3-3
8-8
2-2
In some industrial units for Ethernet, the RJ45 contact’s shield is connected to the
chassis via a capacitor, see 1 in drawing above.
The operator panel’s Ethernet shield is directly connected to the chassis, see 2
in drawing above.
1. Check whether the other Ethernet unit has its shield directly grounded or
grounded via a capacitor.
In many cases, connecting the shielded Ethernet cabling to the chassis at both
ends is inappropriate. Hum or grounding loops can occur. Unshielded cabling
may even result in fewer communication errors.
If using a HUB on the LAN B port results in different issues, like bad
performance, then it is recommended to use Switch instead of HUB.
3BSE069463-600 Rev D 35