Switch User Manual

Table 45: Power Specifications for a 2000 W DC Power Supply Used in an EX8208 Switch
SpecificationsItem
•
Minimum operating voltage: –40 VDC
•
Nominal operating voltage: –48 VDC
•
Operating voltage range: –40 VDC through –72 VDC
NOTE: If the input voltage from the DC power source drops below –37.5 VDC through –39.5
VDC, the switching platform automatically shuts down. During automatic shutdown, the
circuit remains active. When the input voltage returns to –43 VDC through –44 VDC, the
switch automatically starts up again and the system returns to normal operation within 30
minutes. No operator intervention is required.
DC input voltage
50 A maximum at nominal operating voltage (–48 VDC) for each input terminal.DC input current rating
2000 WOutput power
100 AInternal Fuse Protection
Related Topics DC Power Supply in an EX8200 Switch on page 48•
• DC Power Supply LEDs in an EX8200 Switch on page 50
Power Requirements for EX8208 Switch Components
Table 46 on page 111 lists the power requirements for different hardware components
of an EX8208 switch under typical voltage conditions.
Table 46: EX8208 Switch Component Power Requirements
Power Requirements (Watts)Components
•
300 W (at normal fan speed)
•
1100 W (at maximum fan speed)
Fan tray
200 WSwitch Fabric and Routing Engine (SRE) module
100 WSwitch Fabric (SF) module
450 W8-port SFP+ line card (including optical transceivers)
550 W40-port SFP+ line card (including optical transceivers)
330 W48-port SFP line card (including optical transceivers)
350 W48-port RJ-45 line card
Related Topics AC Power Supply in an EX8200 Switch on page 40•
• DC Power Supply in an EX8200 Switch on page 48
111Copyright © 2010, Juniper Networks, Inc.
Chapter 7: Planning Power Requirements