Hitachi S10mini User Manual page 292
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Also See for S10mini:
- Hardware manual (197 pages) ,
- User manual (123 pages) ,
- Manual (53 pages)
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8 APPENDIXES
8.7 Grounding the FL-net System
8.7.1 Overview of FL-net system grounding
Figures 8-74 and 8-75 show the methods of grounding the FL-net system's controller control panel
with a steel frame of a building.
The control panel can be grounded with a building's steel frame only when the following conditions
are met. If the conditions are not met, make a ground connection that is dedicated to the controller
(provide Class D or higher grounding).
• Steel frames are welded together.
• The Class D grounding work requirements are met between the earth ground and steel frames.
• No high-voltage circuit current flows to the control panel's grounding point.
• The control panel's grounding point is positioned at least 15 m away from a high-voltage circuit
panel.
Figure 8-74 Controller Control Panel Grounding Method 1
Control
Steel frame
panel
grounding point
To be positioned at a distance of at least 15 m
(Steel Frame Grounding)
Building's
steel frame
8-68
High-
voltage
circuit panel
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