Dc Power Supply Specifications For Ex9253 Switches - Juniper EX9253 Hardware Manual

that require dedicated feeds. We recommend that you use a dedicated customer-site circuit breaker
rated for 40 A (–48 VDC) minimum, or as required by local code. Doing so enables you to operate the
switch in any configuration without upgrading the power infrastructure.

DC Power Supply Specifications for EX9253 Switches

Table 11 on page 33 lists the DC power system electrical specifications.
Table 11: DC Power System Electrical Specifications
Item
DC input voltage
DC system input current rating
DC system input power
Table 12 on page 33 lists the DC power supply electrical specifications.
Table 12: DC Power Supply Electrical Specifications
Item
Maximum output power
DC input voltage
DC input current rating
Specification
Operating range: –40 through –72 VDC
54 A @ –48 VDC (maximum)
2500 W
Specification
1100 W
Minimum: –40 VDC
Nominal: –48 VDC, –60 VDC
Operating range: –40 through –72 VDC
32 A @ –48 VDC
33