16
2 Installing/Routing Ground and Power Cables
Power Cable Connections
d
OptiX PTN 7900-32 subrack has 10 PIU slots.
A and B areas of PIU boards work in hot
backup mode. PIU boards in the A channel
function as working boards, and those in the B
channel as protection boards. For each channel
of PIU boards, the rated input voltage is -48 V,
and output power is 2400 W.
Area A
Area B
Office
grounding bar
Cabinet grounding
Cabinet
Ground
Cable
Connect to the
first power
cabinet
NOTE
If no short copper fitting is used, use the 5+5 or 3+3 power
supply mode. The rated input current of each channel is 63 A.
NOTE
The signal cable, power cable and fiber should be
routed and bundled separately. Connect these
cables in sequence: PGND power cable > -48 V
power cables > BGND power cables.
When installing the PGND power cable, connect
the PGND cable to one grounding bolt on the
cabinet and to the grounding bar on the other side.
NOTE
In this example, a short copper fitting is not used. The
following figure shows the power cable connection relationship.
PIU
46
PIU
47
PIU
48
PIU
49
PIU
50
EFI
51
PIU
52
PIU
53
PIU
54
PIU
55
PIU
56
63A 63A 63A 63A
63A
63A 63A 63A 63A
63A
If a short copper fitting is used, use the 3+3 power supply
mode. For 1+1, the rated input current of each channel is 63 A.
For 2+2, the rated input current of each channel is 125 A.
PIU
46
PIU
47
PIU
48
PIU
49
PIU
50
EFI
51
PIU
52
PIU
53
PIU
54
PIU
55
PIU
56
63A
63A
125A
125A
125A
125A
PIU
46
PIU
47
PIU
48
PIU
49
PIU
50
EFI
51
PIU
52
PIU
53
PIU
54
PIU
55
PIU
56
63A 63A 63A
63A 63A 63A
Properly connect PGND cables
between the cabinet doors and rack.
