Table 4: DC Input Current and Voltage Information
–
48 VDC or
–
60 VDC (tolerance range:
–
40 to
–
72 VDC)
Nominal input voltage
50 A maximum at
–
48 VDC
40 A maximum at
–
60 VDC
60 A maximum at
–
40 VDC
Input line current
Each wiring block on the DC power tray contains two sets of terminals, one positive and one negative, and
is covered by a plastic terminal block cover that is secured by a screw to a torque of 5 to 7 in-lb (0.56 to 0.79
N-m). Each DC power cable is connected to a power tray with a torque of 45 to 55 in-lb (5.1 to 6.2 N-m).
The terminal block supports 4-6-AWG input wire.
The cable should be sized according to local and national installation requirements. Use only copper cable.
An
“
allpole
”
separation of the power source is not required. The DC PM is an isolated DC/DC converter
with no galvanic connection between
“
L+
”
and the FCC. In addition, the
“
L+
”
potentials of each PM are
isolated from each other.
Note
Cisco Network Convergence System 6000 Fabric Card Chassis Hardware Installation Guide
44
Installing the Power Components
DC Power System
