7. Wiring
7-7
■ Example of internal panel wiring
Figure 7-8 Example of internal panel wiring
CPU
ユニット
PI/O
ユニット
NFB
NFB
H
N
H
N
LG
PCs
用とは別の接地
TB
(端子台)
静電シールド付き
絶縁トランス
制御電源へ
PCs
用
D
種接地
床とは絶縁してください。
5.5mm
2
以上
5.5mm
2
以上
PCs
ユニット用アース座
(盤とは絶縁してください。)
2mm
2
以上
盤アース
シールド
アース
2mm
2
以上
Must be insulated from the floor.
To control power supply
Different ground connection
from that used by PCs
Class D grounding with the ground
resistance of 100Ω or less for PCs
Grounding point for PCs unit
(must be insulated from the panel)
2 mm
2
or more
Shield ground
Panel ground
TB (terminal block)
CPU unit
PI/O unit
NFB
2 mm
2
or more
NFB
5.5 mm
2
or more
5.5 mm
2
or more
Electrostatic-shielded
insulating transformer
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