A-90188E-01 CONNECTION 3.HARDWARE CONNECTIONS
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3.5.3 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.
Fig.4.5.3(a) Large-Scale Network
Fig.4.5.3(b) Small-Scale Network
Note 1
Electrically separated
by 100BASE-TX cable
connection
Note 1Note 1
Note 1
Note 2
Note 1Note 1
Note 1
Board
Mac hine
Mac hine
Mac hine
STP cable
STP cable
Personal computer/ HUB side
Machine system
Note 2
HUB
HUB
Sw itching
HUB
Personal computer
Note 2
Hub pow er supply
Note 1
Electrically separated
by 100BASE-TX cable
connection
Note 1Note 1
Note 1
Note 2
Note 1Note 1
Note 1
Board
Mac hine
Mac hine
Mac hine
STP cable
STP cable
Personal computer/ HUB side
Machine system
Note 2
HUB
HUB
Sw itching
HUB
Personal computer
Note 2
Hub pow er supply
Hub power
supply
Electrically separated
by 100BASE-TX cable
connection
Note 1
HUB
STP cable
Personal computer
Note 1
Note 1
Note 1
Personal computer/Ethernet trunk side
Machine system
Board
Machine
Note 2
Hub power
supply
Electrically separated
by 100BASE-TX cable
connection
Note 1
HUB
STP cable
Personal computer
Note 1
Note 1
Note 1
Personal computer/Ethernet trunk side
Machine system
Board
Machine
Note 2