MX960 DC Power Supply
In the DC power configuration, the router contains either two
or four DC power supplies (see Figure 1), located at the lower rear of the chassis in slots
PEM3 (left to right).
You can upgrade your DC power system from two to four power supplies.
The DC power supplies in slots
PEM2 provide power to the lower fan tray, DPC slots
11, and SCB slots
2. The DC power supplies in
PEM3 provide power to the upper fan tray, DPC slots
5, and SCB slot
Four power supplies provide full redundancy. If a DC power supply fails, its redundant power supply takes over without interruption.
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 Table 1 for the minimum required number of power supplies.
Table 1: Minimum Required Number of DC Power Supplies
|Router Model||Configuration||Minimum Required Number of Power Supplies||Model Number|
One per zone x two zones = 2 power supplies
Each high-capacity DC power supply supports two DC feeds. You
must set the input mode switch according to the number of DC feeds
available for the power entry module(PEM). The input mode switch positions
1 indicate the following:
Position 0—Indicates that only one DC feed is provided.
Position 1—Indicates that two DC feeds are provided.