Safety precautions
xiv
• The grounding wire from each unit must be connected to the enclosure or the
grounding plate directly.
• Wires for grounding must be in accordance with applicable electrical installation
regulations and the internal wiring rules.
• The grounding terminal of a motor must be wired to the grounding terminal of the
corresponding Drive Unit.
• All wires to be grounded must be directly connected to a single point with ground
resistance of 100
Ω
or less.
Otherwise electric shock, a fire, or malfunction could result.
• The grounding point for the control units must not be shared with power devices.
Otherwise malfunction could result.
MANDATORY
Drive Unit
Example grounding wiring
200 VAC
Enclosure
AVR
CN
CN
E
E
LF
U
V
W
LF
M
PG
Operating relay
sequence
Single-point grounding
Ground resistance
100 or less