Yaskawa MP920 User's Manual Design - Manual (Page 202)

5.1 Power Supply Modules
5-7
5
„ Grounding
Protective Ground Terminal (FG)
A ground wire must be connected to the protective ground terminal (FG) of the PS-01 Mod-
ule.
Connect the protective ground terminal (FG) of the PS-01 Module to the ground terminal (E)
of the Control Panel using an internal panel ground wire of the following size.
• Ground wire size: 1.5 mm
2
(AWG16) to 2.5 mm
2
(AWG13)
When more than one Power Supply Module is used, do not wire the internal panel ground
wire to the protective ground terminal. For multiple Power Supply Modules, wire the protec-
tive ground terminal of each Power Supply Module independently to the ground terminal of
the Control Panel.
Use Phillips M4 screws for the protective ground terminals. Use M4 screw crimp terminals
on the ends of the internal panel ground wires.
Control Panel Grounding
Wire the control panel ground terminal to the ground pole using an external panel ground
wire with a thickness of at least 8 mm
2
(AWG8). Make the ground wire as short as possible.
Use a ground pole with a resistance of 100 Ω or less. Do not share the ground line or ground
pole with other high-power electrical devices, such as electrically powered equipment or
three-phase devices.
• Do not accidentally leave foreign matter such as wire chips in a Module when wiring.
This may cause fires, failures, and malfunctions.
• Always ground the protective ground terminal (FG) to a ground resistance of 100 Ω or
less.
Failure to ground the PS-01 Module may result in electrical shocks or malfunctioning.
CAUTION
MANDATORY