FX
2N
-16LNK-M MELSEC-I/O LINK REMOTE I/O SYSTEM MASTER BLOCK
Connection and Wiring 3
3-6
Grounding
•
When grounding the FG terminal, use a wire as thick as possible (2.0 mm
2
).
Perform grounding as shown below. Never perform common grounding with equipment with high fre-
quency.
•
When shielded twisted-pair cables are used, transmitted waveforms may be affected by the ground con-
dition and communication errors may occur in a long-distance system.
The effects given by shield grounding is determined by the number of connected remote I/O units and
the total extension distance. If the relationship shown in the table below is realized, do not perform
grounding. (For details, refer to the next page.)
The number of connected remote I/O units above does not mean the number of stations.
When cabtyre cables are used, transmitted waveforms are not affected by the ground condition because
shield is not provided.
Number of connected
remote I/O units
1
2
3
4
5
6
7
8
9
10
11~12 13~15
16
Minimum total exten-
sion distance
150 130 110 100
90
85
75
70
65
60
55
50
I/O link
Other
equipment
I/O link
Other
equipment
I/O link
Other
equipment
Dedicated grounding
→
Best
Common grounding
→
Good
Common grounding
→
Not allowed
Содержание FX2N-16LNK-M
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