Juniper Networks MX480 - Manual (Page 312)

Table 31: Calculating Power Budget for a MX480 AC Chassis
Unused Power 1
Maximum System Output Power Power Supply
1721 W 3081 W MX480 AC Normal-capacity (low-line)
1840 W 3200 W MX480 AC Normal-capacity (high-line)
2141 W 3501 W MX480 AC High-capacity (low-line)
2740 W 4100 W MX480 AC High-capacity (high-line)
1
For this configuration, output power excluding the cooling system is 1360 W.
Table 32: Calculating Power Budget for a MX480 DC Chassis
Zone 1 Unused
Power
2
Zone 0 Unused
Power
1
Maximum System
Output Power
Power Supply
1290 W 240 W 3200 W MX480 DC Normal-capacity
2090 W 1040 W 4800 W MX480 DC High-capacity (DIP=0)
NOTE: The DIP switch position is expected input current;
the correct feeds must be present to obtain the desired
output power.
2290 W 1240 W 5200 W MX480 DC High-capacity (DIP=1)
NOTE: The DIP switch position is expected input current;
the correct feeds must be present to obtain the desired
output power.
1
For this configuration, output power excluding the cooling system is 1360 W.
2
For this configuration, output power excluding the cooling system is 310 W.
3. Calculate input power. In this step, the input power requirements for the example
configuration are calculated. To do this, divide the total output requirement by the
efficiency of the power supply as shown in
Table 33 on page 288 .
Table 33: Calculating Input Power Examples
Input Power Requirement 2 Power Supply Efficiency 1
Power Supply
1694 W 85 % MX480 AC Normal-capacity (high-line)
1618 W 89 % MX480 AC High-capacity (high-line)
1469 W 3 ~98 % MX480 DC Normal-capacity
1469 W 3 ~98 % MX480 DC High-capacity
Copyright © 2013, Juniper Networks, Inc. 288
MX480 3D Universal Edge Router Hardware Guide