Unidrive M / Unidrive HS Modular Installation Guide
109
Issue Number: 5
6.13.2 General requirements for EMC
Ground (earth) connections
The grounding arrangements should be in accordance with Figure 6-23, which shows a single drive on a back-plate with or without an additional
enclosure.
Figure 6-23 shows how to manage EMC when using an unshielded motor cable. However a shielded cable is preferable, in which case it should be
installed as shown in section 6.13.4
Compliance with generic emission standards
Figure 6-23 General EMC enclosure layout showing ground connections
Metal bac
kp
late
Optional
gr
o
u
n
d
c
onn
ec
tion
Ex
t
er
nal
c
ont
r
oll
er
0
V
I
f
t
he c
ont
r
ol
c
i
rcu
it
0
V
i
s
to
be gr
o
u
n
ded,
t
h
i
s
sh
o
u
l
d be d
on
e
at t
he
sys
t
em c
ont
r
oll
er
onl
y
to
a
v
oi
d
inj
ec
tin
g
noi
se
curre
nt
s
into t
he 0
V
c
i
rcu
it
Gr
o
u
n
d
in
g b
a
r
PE
~
PE
I
f gr
o
u
n
d c
onn
ec
tion
s
a
re
m
a
de us
in
g
a
se
pa
r
at
e
c
a
b
l
e,
t
hey sh
o
u
l
d ru
n
pa
r
all
e
l to t
he
app
r
op
r
iat
e
po
wer c
a
b
l
e
to
m
ini
m
i
se
em
i
ss
ion
s
U
se f
o
ur c
o
re c
a
b
l
e
to
c
onn
ec
t t
he m
oto
r
to t
he dr
i
ve
.
The gr
o
u
n
d c
on
duc
to
r
in t
he
m
oto
r c
a
b
l
e mus
t
be c
onn
ec
t
ed
d
i
rec
tl
y
to t
he e
a
r
t
h
t
erm
inal o
f
t
he dr
i
ve
an
d m
oto
r
.
It
mus
t not
be c
onn
ec
t
ed d
i
rec
tl
y
to t
he
po
wer e
a
r
t
h busb
a
r
.
The
in
c
o
m
in
g su
ppl
y gr
o
u
n
d
sh
o
u
l
d be c
onn
ec
t
ed
to a
s
in
g
l
e
po
wer gr
o
u
n
d bus b
a
r
o
r
lo
w
i
m
p
ed
an
ce e
a
r
t
h
t
erm
inal in
s
i
de
t
he cub
i
c
l
e
.
Th
i
s sh
o
u
l
d be used
a
s
a
c
o
mm
on '
c
l
e
an'
gr
o
u
n
d f
o
r
all
c
o
m
pon
e
nt
s
in
s
i
de
t
he cub
i
c
l
e
.
3 p
h
a
se A
C
su
ppl
y
Optional
EM
C
f
ilt
er
Me
tal
b
a
c
kplat
e
s
a
fe
t
y b
on
ded
to
po
wer gr
o
u
n
d busb
a
r
M
a
s
t
er
9
E
9A
1
0
E
9
E
11E
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