8 APPENDIXES
8-69
Figure 8-75 Controller Control Panel Grounding Method 2
(Controller’s Dedicated Class D Grounding)
8.7.2 Power supply wiring and grounding
For the explanation of the FL-net system’s power supply wiring and grounding, the example in
Figure 8-76 indicates the power supply wiring and grounding of the distribution switchboard and
controller panel.
When making power supply wiring and ground connections, observe the following instructions:
• With an insulating transformer with a static shield, provide insulation between the control power
supply and controller power supply.
• Provide Class D grounding for the frames of the distribution switchboard and controller control
panel.
• Do not connect the controller’s FG (frame ground) terminal to the frame of the control panel.
Provide the controller with dedicated Class D or higher grounding.
• Minimize the length of the controller input power supply wiring. Use twisted wiring for the
controller input power supply.
• Connect the controller LG (line ground) terminal to the shield terminal on the insulating
transformer and then to the panel’s frame ground.
High-
voltage
circuit panel
Control
panel
PLC, etc.
Building’s
steel frame
Steel frame
grounding point
Содержание FL.NET
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Страница 33: ...2 FL NET MODULE ...
Страница 42: ...3 FL NET MODULE INSTALLATION ...
Страница 46: ...4 FL NET MODULE WIRING PROCEDURES ...
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Страница 203: ...5 USER GUIDE 5 151 Sample printout ...
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Страница 210: ...7 TROUBLESHOOTING ...
Страница 225: ...8 APPENDIXES ...