N+1 Redundancy Configuration Of Ac Power Supplies - Juniper EX8208 Hardware Manual

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.

N+1 Redundancy Configuration of AC Power Supplies

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
page 27 or EX8216 Switch Configurations.
The tables in this section list the N+1 power requirements for different EX8200 switch configurations:
Table 17 on page 59—Lists the N+1 power requirements of EX8208 switch configurations that use 2000
W AC power supplies.
Table 18 on page 60—Lists the N+1 power requirements of EX8208 switch configurations that use 3000
W AC power supplies.
Table 19 on page 60—Lists the N+1 power requirements of EX8216 switch configurations that use 2000
W AC power supplies.
Table 20 on page 60—Lists the N+1 power requirements of EX8216 switch configurations that use 3000
W AC power supplies.
Table 17: N+1 Power Redundancy Configurations for Different EX8208 Switch Configurations Using
2000 W AC Power Supplies
Switch Configuration
Base
Fully loaded with 8-port
SFP+ line cards
Input Voltage
High-voltage line (200–240 VAC)
Low-voltage line (100–120 VAC)
High-voltage line (200–240 VAC)
Low-voltage line (100–120 VAC)
"EX8208 Switch Configurations" on
Power Supplies
Needed (N)
1
2
3
5
Power Supplies
Needed for N+1
Redundancy
2
3
4
6
59