Juniper ACX2000, Hardware Manual

Page: 65 / 190

Connecting AC Power Cords to the ACX2100 Router | 104
ACX2000 and ACX2100 DC Power Specifications
The power supplies in DC-powered ACX2000 and ACX2100 routers are built in along the front left panel
of the chassis with DC power terminals to connect power to the router. The power supplies are labeled
PS0 and PS1.
When the ACX2100 router are operating normally and both power supplies are switched on, load sharing
between them occurs automatically. When one power supply fails or is turned off, the other power supply
immediately assumes the entire electrical load for the system. A single power supply can provide full power
for as long as the router is operational.
NOTE: When only one power supply is available on an ACX2100 router, we recommend that
you connect both the power inputs to the same source. That is, connect both the DC power
inputs of the ACX2100 router to the only available power supply. Doing so ensures that you get
the maximum amount of hold-up time during a power failure.
ACX2000 and ACX2100 routers support a wide range of voltage ranges as shown in Table 21 on page 65 .
Table 21: DC Power Electrical Specifications
Specification Item
•
20 to 30 VDC
•
–39 to –56 VDC
•
–39 to –72 VDC
DC input voltages
•
10 A @ 24 VDC
•
5 A @ –48 VDC
•
4 A @ –60 VDC
DC input currents
110 W Power supply output
65 W per port at 54 V PoE output
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