33
•
Connections of the power cables between the general and enhanced OptiX OSN 3500
subracks and the DC power distribution box (TN51PDU)
A
B
B
A-NEG(-)
B-NEG(-)
A-RTN(+)
B-RTN(+)
Ground bar in the telecommunications
room
B
A
When installing the power cables,
you can connect the power cable
connectors to the PIU board in the
subrack only after replacing the
existing power cables for the
subrack in the cabinet with the
power cables delivered with the
subrack, as shown in the following
figure.
When grounding the subrack, connect the ground bolt on the subrack to the ground point on the column inside
the cabinet. The subrack then is connected to the external ground bar through the PGND cable on the top of the
cabinet.
NOTE
CAUTION
-
48
V
-
48
V
0
V
0
V
-
48
V
-
48
V
0
V
0
V
Power supply facilities in
the telecommunications
room
-
48
V
-
48
V
0
V
0
V
-
48
V
-
48
V
0
V
0
V
Power supply facilities in
the telecommunications
room
