Hitachi IR.LINK, User Manual, Page: 37 / 103

3 MOUNTING AND WIRING
3-4
3.3 Ground Wiring
Figure 3-2 Ground Wiring
NOTICE
z For the ground wiring of the FG (frame ground), connect the FG terminal of
each module with an external terminal to the FG terminal of the mount base.
Perform class D grounding from the FG terminal of the mount base.
z Use a ground wire with a wire diameter of 2 mm
2
or more.
z Connect the shielding wire of the communication cable to the SHD terminal of
the CPU or LPU module.
(*) 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 or less 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.
FG terminal
Mount base
FG terminal
2.0 mm
2
or more
Class D grounding (*)