Juniper MX960 Hardware Manual page 164

For existing power supplies, each DC power supply has a single DC input (–48 VDC and return). For
high-capacity power supplies, each DC power supply has two DC inputs (–48 VDC and return).
The minimum number of power supplies must be present in the router at all times. See
for the minimum required number of power supplies.
Table 68: Minimum Required Number of DC Power Supplies
Router Model Configuration
MX960 High-capacity DC
MX960 Normal-capacity DC
Figure 39: DC Power Supply
Minimum Required Number of
Power Supplies
One per zone x two zones = 2 power
supplies
2
Table 68 on page 141
Model Number
PWR-MX960-4100-DC
PWR-MX960-DC
141