
B-63354EN/04 V. CONNECTION 4.HARDWARE CONNECTIONS
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4.5.3 Grounding the Network
Even if the grounding conditions on the machine are satisfied,
electrical noise from the machine sometimes enters the
communications line and causes communications interference
depending on the installation conditions and the peripheral
environment of the machine. To prevent the entry of such electrical
noise, separating and insulating the machine from the Ethernet trunk
cable and the personal computer effectively reduces the influence of
electrical noise.
The following figure shows an example of such a connection.
Note 1
Note 1
Electrically separated
by 10BASE-T cable
connection
Note 1Note 1
Note 1
Note 1
Note 1Note 1
Note 1
Hub power
supply
Ethernet
HUB
Machine
Machine
Machine
10BASE-5 Ethernet
trunk cable
STP cable STP cable
Personal computer
Personal computer/Ethernet trunk side
Machine system
Note 2
Fig.4.5.3(a) Large-Scale Network
Hub power
supply
Electrically separated
by 10BASE-T cable
connection
Note 1
HUB
STP cable
Personal computer
Note 1
Note 1
Note 1
Personal computer/Ethernet trunk side
Machine system
Ethernet
Machine
Note 2
Fig.4.5.3(b) Small-Scale Network