YASKAWA SIEMENS CNC Series, Maintenance Manual, Serviceman Handbook

Page: 19 / 373

Safety precautions
xix
• 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 servo motor must be wired to the grounding
terminal of the corresponding SERVOPACK.
• All wires to be grounded must be directly connected to a single point that
is class-D or better grounded.
Otherwise electric shock, a fire, or malfunction could result.
• The single grounding point for the product must not be used to also
ground a power device.
Otherwise malfunction could result.
MANDATORY
S.V
200 VAC
Enclosure
AVR
Operation relay
sequence
CN
CN
E
E
LF
U
V
W
LF
Single-point grounding
(Ground resistance 100
Ω
or less)
Example grounding wiring
M
PG