Installing the 7750 SR-a Chassis
7750 SR-a4 and SR-a8 Installation Guide 87
Figure 24: Attaching the Chassis Ground Connector
Required tools and hardware:
• wire stripping tool
• wire cutter
• crimping tool, Burndy Die Index #49
• 3/8 in. hex torque driver for #10 hex nut
• copper ground wire cable (minimum #8 AWG)
To make the chassis ground connection:
Step 1. Run a single length of minimum #8 AWG wire from the ground point (building
ground or equipment ground bus) to the chassis ground studs. When routing the
cable, ensure that there is enough extra wire to form a service loop at the chassis
end in order to facilitate maintenance.
7750
S
R
-a4 F
an
T
r
ay
Pwr
Stat
S
l
ot
L
a
yout
1/
1 XP
1
/
2
1/
3
1
/
4
1
CPM
A
CP
M
B
7750 SR
-a4
Se
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ute
r
P
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S
t
at
P
wr
7
7
5
0
MD
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-aX
P
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-
1
0
0
G
B
-
C
F
P
S
t
at
L
nk
P
wr
7
7
5
0
MDA
-
a
20-
1GB-TX
St
a
t
L
nk
1
A
ct
2
L
n
k
3
A
ct
4
L
n
k
5
A
ct
6
L
nk
7
Act
8
L
nk
9
A
ct
10
L
n
k
11
A
ct
12
L
n
k
13
Act
14
L
n
k
15
Ac
t
16
L
n
k
17
Ac
t
1
8
L
n
k
19
Act
20
Sy
nc
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1
5
8
8
A
la
r
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s
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S
ACO/LT
Cr
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t
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cal
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wr
7
7
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0
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at
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l
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gmt O
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T
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ompact Flash
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or
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nor
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n
c
E/
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5
8
8
Ala
rms
1PP
S
AC
O
/LT
Cr
i
tic
a
l
Lnk
DTE
Pwr
7
7
5
0
C
P
M-
a
S
t
a
t
C
on
sole
M
gmt
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E
S
B
I
T
S
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om
pac
t
Flash
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c
tLnkAct
Maj
or
M
inor
P
w
r
7750
S
R-
a
S
t
at
P
w
r
Sta
t
7
7
5
0
MD
A-
a
XP
1
0
-
1
0
G
B-
S
FP
+
10
Lnk
A
c
t
9
Ln
k
Act
8
Lnk A
c
t
7
Lnk A
c
t
6
Lnk A
c
t
5
Ln
k
A
c
t
4
Lnk
A
c
t
3
Lnk
Act
2
Ln
k
Act
1
Ln
k
Act
P
w
r
7
7
5
0
M
DA
-
a
4
4
-
1
G
B-
CS
FP
/
S
FP
S
tat
Ln
k
/
Ac
t
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
2
5
2
6
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
4
3
44
17
18
1
9
20
2
1
22
23
24
Air
F
i
lt
er
A
c
c
es
s
7
7
5
0
S
R
-a
4
24551
2 3 1
1
Table 39: Ground Wire Connection Parts
Key Description
1 Chassis ground studs on the chassis mounting flange
2 Two 10-32 KEP nuts for the ground lug (supplied in the accessory kit)
3 Two-hole ground lug and copper wire cable