N+1 Redundancy Configuration Of Ac Power Supplies; Table 18: N+1 Power Redundancy Configurations For Different Ex8208 Switch Configurations Using 2000 W Ac Power Supplies - Juniper EX8208 Complete Hardware Manual

N+1 Redundancy Configuration of AC Power Supplies

Copyright © 2010, Juniper Networks, Inc.
is 52 VDC. The output power is 1200 W for low-voltage line input and 2000 W for
high-voltage line input.
The 3000 W AC power supply supports only the high-voltage line input (200–240 VAC)
AC power configuration. Low-voltage line input is not supported for the 3000 W AC
power supplies on the EX8200 switches. The output is 52 VDC. The output power is
3000 W for high-voltage line input.
N+1 redundancy configuration is required for normal operation of EX8200 switches. In
an N+1 redundancy configuration, if one power supply fails or is removed, the remaining
power supplies continue to supply power for the switch without interruption.
Depending on the configuration type of the switch and the input voltage, determine the
number of power supplies needed (N) for a switch. Install an additional power supply to
meet the required N+1 redundancy configuration. For details about different switch
configurations, see "EX8208 Switch Configurations" on page 7 or EX8216 Switch
Configurations.
The tables in this section list the N+1 power requirements for different EX8200 switch
configurations:
Table 18 on page 43—Lists the N+1 power requirements of EX8208 switch configurations
that use 2000 W AC power supplies.
Table 19 on page 44—Lists the N+1 power requirements of EX8208 switch configurations
that use 3000 W AC power supplies.
Table 20 on page 44—Lists the N+1 power requirements of EX8216 switch configurations
that use 2000 W AC power supplies.
Table 21 on page 44—Lists the N+1 power requirements of EX8216 switch configurations
that use 3000 W AC power supplies.
Table 18: N+1 Power Redundancy Configurations for Different EX8208
Switch Configurations Using 2000 W AC Power Supplies
Switch
Configuration Input Voltage
Base High-voltage line
(200–240 VAC)
Low-voltage line
(100–120 VAC)
Fully loaded with High-voltage line
8-port SFP+ line (200–240 VAC)
cards
Low-voltage line
(100–120 VAC)
Chapter 2: Component Descriptions
Power Supplies Power Supplies
Needed (N) Needed for N+1
1 2
2 3
3 4
5 6
43