Power Supply Planning; Power Distribution According To Number Of Installed Power Supplies - Enterasys G3G124-24 Hardware Installation Manual

Installing and Removing a Power Supply

Power Supply Planning

As shown in Table
switch setting) has not been disabled through the CLI, the power supplies share the load equally
and provide power redundancy. If one power supply fails or is removed (hot swapped) for any
reason, the other power supply takes up the load. Power redundancy remains in effect as long as
the load does not exceed the power as stated in the Redundancy column.
Table 2-1 Power Distribution According to Number of Installed Power Supplies
Power
Supplies
1
2
1. If power requirements exceed this capacity, power redundancy is no longer supported. Removing a power
supply under this condition will cause the remaining power supplies to go into over-current protection and shut
down the power system.
Supported Power Configurations
The following power configurations are supported on the G3:
• Non‐redundant (additive)
–
–
–
–
–
• Redundant
–
–
–
Power Distribution Upon Power Removal or Addition
Power Supply Removal
When a power supply is removed, the G3 responds to the decrease in available power by:
1. Detecting the power supply removal and recalculating available power.
2. Subtracting the power capacity for its base system and all installed modules from available
power.
3. Distributing remaining power equally across installed PoE controllers by reprogramming
maximum power in each controller.
4. Dropping support to PoE devices as necessary to stay within the programmed maximum
power.
2-6 Installation
2‐1, when two power supplies are installed and power redundancy (the default
Redundancy
No
Yes, if power demand is less than
the capacity of one power
1
supply.
400 Watts
800 Watts (2 X 400)
1200 Watts
1600 Watts (1200 + 400)
2400 Watts (1200 X 2)
400 Watt (2 X 400)
400 Watt (400 + 1200)
1200 Watt (2 X 1200)
Hot
Power Sharing
Swappable
No Maximum power 1200
Yes The total load is shared by both power
supplies.