7750 SR-a4 and 7750 SR-a8 Overview
7750 SR-a4 and SR-a8 Installation Guide 43
Figure 12: Air Filter Carrier (7750 SR-a4)
The air filter prevents large particles, debris, and dust from entering and circulating through
the system. The air filter must always be in place while the chassis is powered.
Filters should be inspected monthly and replaced when accumulated dust is present. The
replaceable filters can be ordered separately, as described in Table 9.
See Removing and Replacing an Air Filter on page 189 for more information.
Impedance Panels
Impedance panels are required on all empty card and component slots to prevent excess dust
accumulation and to help control airflow and electromagnetic interference, and for safety
reasons. Impedance panels do not have board components or connector pins.
Table 9: Air Filters
Chassis Variant Part Number
7750 SR-a4 ACC - 7750 SR-a4 AIR FILTER (5 pack) 3HE09420AA
7750 SR-a8 ACC - 7750 SR-a8 AIR FILTER (5 pack) 3HE09421AA
7750 SR
-a4 Fa
n
Tra y
P
w
r
S
t
at
S
l
o
t
L
ay
o
u
t
1
/
1
X
P
1
/
2
1
/
3
1
/
4
1
C
P
M
A
CP
M
B
7750
SR-a4
S
e
r
vic
e
Ro
u
te
r
P
w
r
S
t
a
t
P
w
r
7
7
5
0
M
D
A
-
a
X
P
1
-
1
0
0
G
B
-CF
P
S
t
a
t
Lnk
P
w
r
7
7
5
0
MDA-a
2
0
-
1
G
B-
TX
S
t
a
t
L
n
k
1
A
c
t
2
L
n
k
3
A
c
t
4
L
n
k
5
A
c
t
6
L
n
k
7
Ac
t
8
L
n
k
9
Ac
t
10
L
n
k
11
A
c
t
12
L
nk
13
Ac
t
14
L
n
k
1
5
Ac
t
16
L
n
k
1
7
A
c
t
18
L
n
k
19
A
ct
20
Sy
ncE/15
8
8
A
larms
1
P
P
S
A
C
O
/
L
T
Cr
i
t
i
c
a
l
Lnk
DTE
P
w
r
7
7
5
0
C
P
M-a
S
t
a
t
Co
n
so
l
e
M
g
m
t
O
E
S
B
I
TS
Com
pact
Fl
ash
DCE
A
c
t
Lnk Ac
t
Ma
j
or Minor
Sy
n
c
E/1
5
8
8
A
larm
s
1
P
P
S
A
CO/
LT
Cr
i
t
ic
a
l
Lnk
DT
E
P
w
r
7
7
5
0
C
P
M-a
S
t
a
t
Co
n
so
l
e
M
gmt
O
E
S
B
I
TS
C
o
m
pac
t
Fl
ash
D
C
E
A
c
t
Lnk Ac
t
M
a
j
or Minor
P
wr
7750
SR-a
S
t
at
P
w
r
Sta
t
7
7
5
0
M
D
A
-
a
XP
1
0
-
1
0
G
B-
S
FP
+
10
Lnk
Ac
t
9
LnkAc
t
8
Lnk
Ac
t
7
Ln
k
Act
6
Lnk Act
5
Lnk
A
ct
4
Ln
k
A
ct
3
Ln
k
Act
2
Lnk
A
ct
1
Ln
kA
c
t
P
w
r
7
7
5
0
M
DA-a
4
4
-
1
G
B-
CS
FP
/
S
FP
St
a
t
L
n
k
/
A
c
t
1
2
3
4
5
6
7
8
9
1
0
1
1
1
2
1
3
1
4
1
5
1
6
2
5
2
6
2
7
2
8
2
9
3
0
3
1
3
2
3
3
3
4
3
5
3
6
3
7
3
8
3
9
4
0
4
1
4
2
4
3
4
4
1
7
1
8
1
9
2
0
2
1
2
2
2
3
2
4
A
ir
F
ilt
er
A
c
c
es
s
7
7
50
S
R
-a4
24544
Air filter