17
2 Installing/Routing Ground and Power Cables
Power Cable Connections
– DC Power Distribution Unit (DPD63-8-8)
d
The OptiX PTN 7900-24 can import 6 independent power channels from the
first power cabinet into the PDU, including 3 working channels (A1 to A3) and
3 protection channels (B1 to B3). For each channel of PDU boards, the rated
input voltage is -48 V, and output power is 2400 W.
The input A1 to A3 channels correspond to the output a1 to a3 channels, and
the input B1 to B3 channels correspond to the output b1 to b3 channels.
NOTE
If no short copper fitting is used, use the
3+3 or 2+2 power supply mode. The rated
input current of each channel is 63 A.
Office ground
bar
Cabinet grounding
Cabinet
Ground
Cable
Connect to
the first power
cabinet
63 A 63 A 63 A
63 A 63 A 63 A
1
PDU
2
PDU
3
PDU
4
PDU
1
PDU
2
PDU
3
PDU
4
PDU
If a short copper fitting is used, use the
2+2 power supply mode. For 1+1, the
rated input current of each channel is 125
A. For 1+1, the rated input current of
each channel is 63 A.
63 A
63 A
125 A
125 A
1
PDU
2
PDU
3
PDU
4
PDU
1
PDU
2
PDU
3
PDU
4
PDU
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 ground bolt on the cabinet
and to the ground bar on the other side.
NOTE
Using 3 + 3 power supply mode as an example, the following
figure shows the power cable connection relationship.
Properly connect PGND cables
between the cabinet doors and rack.
63 A 63 A
63 A 63 A
1
PDU
2
PDU
3
PDU
4
PDU
1
PDU
2
PDU
3
PDU
4
PDU
A1 A2
A3 A4
A1A2A3A4 B1B2 B3B4
B1 B2
B3 B4
a1 a2
a3 a4
a1a2 a3a4 b1b2 b3b4
b1 b2
b3 b4
Power input
area:
Power output
area:
