
2.MECHANICAL DESIGN HANDLING, DESIGN, AND ASSEMBLY B-65382EN/02
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2.8 GROUND LEAD CONNECTION
Ground lead connection is very important to safety, conformance to
the European standards, and improved noise protection. A typical
example of connection is shown below.
Linear motor
Head
Magnetic pole sensor
G
G
r
r
o
o
u
u
n
n
d
d
b
b
a
a
r
r
(
(
i
i
n
n
s
s
u
u
l
l
a
a
t
t
i
i
o
o
n
n
)
)
Power supply
(transformer)
Feedback
Power line
Ground
24 V power supply, etc.
Power supply or circuit to be
prepared by the customer
according to the specifications of
the machine
Shield
Machine cabinet
Position
detection circuit
Linear encoder head
Shield
Ground bar (insulation)
NOTE
1 Connect all ground leads securely.
2 When an absolute linear encoder is used, a
magnetic pole sensor and position detection circuit
are unnecessary. The feedback lead from the
linear encoder head is directly connected to SVM.
3 For some types of linear encoders, it is
recommended that the main linear encoder unit be
grounded. For details, refer to the specifications of
each linear encoder or contact the manufacturer of
each linear encoder.
4 Use ground leads that conform to the European
standard (EN) and UL in thickness, color, type, and
so forth.
5 The amount of leak current flowing through the
linear motor may exceed the value specified in
EN60335-1. Take appropriate measures by, for
example, adopting a structure that prevents the
operator from contacting conductive parts near the
motor during energization.