Hitachi S10mini D, Hardware Manual

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1 BEFORE USE
- 6 -
Output module
Attach a fuse to the load power supply of the output module for protecting against short circuits.
Use a fuse matching the rating of the load. If a fuse in excess of the rating is used, short circuits in
the load could burn the PC board, casing and other components.
Fuse
Power
supply
Load
S10mini
(Output module)
Grounding
Do not ground the PCs panel together with other equipment. Ground it independently at Class D*
or higher. Never ground the PCs panel within a distance of 15 m from the grounding point of a
power distribution panel.
It is best to ground the S10mini to a steel frame of a building. If such grounding is not possible,
bury a grounding rod in the ground.
Separate the grounding point
of the PCs panel from that
of a power distribution panel
by at least 15 m.
LG ground line
FG ground line
PCs
panel
Power
distribution
panel
Steel
frame
* Class D grounding is defined in the Technical Standard for Electrical Facilities of Japan. This
standard states that the grounding resistance must be 100 ohms for equipment operating on 300
VAC or less, and 500 ohms or less for devices that shut down automatically within 0.5 seconds
when shorting occurs in low tension lines.