Table 20: Power Supply Electrical Specifications (continued)
Specification
Item
High-Capacity Power Supplies
70 A (DIP=1)
60 A (DIP=0)
Maximum Input Current
2440 W
2240 W
Maximum output power
54.2 A @ -48 VDC normal operating
voltage
50 A @ -48 VDC normal operating
voltage
DC input current rating
Operating Range: –40.5 VDC to –72 VDC
Nominal: –48 VDC
DC input voltage
~98%
Efficiency
NOTE:
This value is at full
load and nominal voltage.
Table 21: Power System Specifications
High-Capacity
Normal-Capacity
Item
2+2
2+2
Redundancy
70 A (DIP=1)
60 A (DIP=0)
1600 W
Output power
(maximum) per
supply
2440 W
2240 W
4880 W
4480 W
3200 W
Output power
(maximum) per
system
See Also
Calculating Power Requirements for MX480 Routers on page 158
•
DC Power Circuit Breaker Requirements for the MX480 Router
Each DC power supply has a single DC input (–48 VDC and return) that requires a
dedicated circuit breaker. If you plan to operate a maximally configured DC-powered
router with normal-capacity power supplies, we recommend that you use a dedicated
customer site circuit breaker rated for 40 A (–48 VDC) minimum, or as required by local
code. If you plan to operate a maximally configured DC-powered router with high-capacity
power supplies, we recommend that you use a circuit breaker rated for 70 A (–48 VDC),
or as required by local code.
If you plan to operate a DC-powered router at less than the maximum configuration, we
recommend that you provision a circuit breaker according to respective National Electrical
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