Installation guide

2. Installation
8620-A2-GN20-50 June 2004
2-13
Using AC Power with DC Power Backup
Procedure
✔ Make sure that the DC power source wires are not powered (that is, the circuit
breakers are open).
✔ The ends of the DC power source wires (14–18 AWG solid or stranded wire)
must be stripped of insulation. If they are not stripped of insulation, strip the tip
of each wire (about 1/2 inch or 12.7 mm in length) before plugging the wire into
the appropriate connector on the –48V input terminal block. Ensure that each
wire is fully inserted into the terminal (until it can go no further).
To supply both AC and DC power to the 8620 chassis for power redundancy:
1. Plug the AC power cord into the IEC 320 receptacle labeled AC INPUT ( ).
2. Insert the wires for the DC power source into Terminal B and securely fasten
each wire by tightening the screw above it. The insulation should be fully within
the terminal block and no bare wire should be exposed outside of the block.
NOTE:
You should clearly label these power source wires as –48V and RTN
respectively.
3. Plug the other end of the AC power cord into the AC outlet.
4. Power the DC connections.
5. Make sure the PWR A and PWR B LEDs on the front panel are both ON
(green).
Insert Power Source B’s . . . Into the . . .
Negative side –48V B input terminal.
Positive side RTN B (return) terminal.
MCP
8000
S
Y
S
T
E
M
OK
Alrm
Test
TX
RX
Coll
E
T
H
E
R
N
E
T
E
S
D
S
IM
A
1
2
3
AC OUTLET
D
C
F
U
SE
S
A
B
-48V
R
TN
A
BA
B
AB
D
C
PO
W
E
R
F
A
N
M
A
J
O
R
M
I
N
O
R
A
LAR
M
S
ALA
R
M
C
LO
CK
AB
S
E
R
IAL
SCM MCP
LA
N
SCM MCP
SIM
IP
MVL
8314
S
Y
S
T
E
M
O
K
A
lr
m
T
e
s
t
T
X
R
X
L
O
C
1
2
3
4
A
T
M
B
U
S
D
S
L
P
O
R
T
5
6
7
8
9
1
0
1
1
1
2
SCM-E3
10/100BT
8025
SYSTEM
O
K
A
lr
m
T
e
s
t
T
X
R
X
C
o
l
l
ETHERNET
U
p
l
i
n
k
A
lr
m
TX
RX
IP
MVL
8314
S
Y
S
T
E
M
O
K
A
lr
m
T
e
s
t
T
X
R
X
L
O
C
1
2
3
4
A
T
M
B
U
S
D
S
L
P
O
R
T
5
6
7
8
9
1
0
1
1
1
2
04-16898-01
DC FUSES
A
B
-48V RTN
A BA B
AB
DC
POWER
SYSTEM
OK
Alrm
Test
TX
RX
ETHERNET
Uplink Alrm