Juniper-networks MX480 Bedienungsanleitung PDF herunterladen (Seite 312)

Table 31: Calculating Power Budget for a MX480 AC Chassis

Unused Power

MaximumSystem Output PowerPower Supply

1721 W3081 WMX480 AC Normal-capacity (low-line)

1840 W3200 WMX480 AC Normal-capacity (high-line)

2141 W3501 WMX480 AC High-capacity (low-line)

2740 W4100 WMX480 AC High-capacity (high-line)

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

Zone 0 Unused

Power

Maximum System

Output PowerPower Supply

1290 W240 W3200 WMX480 DC Normal-capacity

2090 W1040 W4800 WMX480 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 W1240 W5200 WMX480 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.

For this configuration, output power excluding the cooling system is 1360 W.

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

Power Supply Efficiency

Power Supply

1694 W85 %MX480 AC Normal-capacity (high-line)

1618 W89 %MX480 AC High-capacity (high-line)

1469 W

~98 %MX480 DC Normal-capacity

1469 W

~98 %MX480 DC High-capacity

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Juniper-networks MX480 Bedienungsanleitung Seite 312