The power supply in EX-series switches (see Figure 13 and Figure 14) is a hot-removable and hot-insertable field-replaceable unit (FRU). EX 4200 switches have an internal redundant power supply, making the power supply in EX 4200 switches fully redundant. The power supply in EX 3200 switches is not redundant. However, you can connect an external power supply to provide redundancy.
EX-series switches use AC power that provides two DC output voltages: 12 V for system and logic power and 48–51 V (or higher, to compensate for voltage drops along the path from the power supplies to the RJ-45 connector) for PoE ports.
The power supply in EX-series switches is available in 320 W, 600 W, and 930 W models. The exterior of the 600 W model is identical to that of the 930 W model. The number of ports on which PoE is enabled determines the minimum power requirements.
Figure 13: 320 W Power Supply
Figure 14: 600 W and 930 W Power Supply
Table 13 provides the minimum power requirements for each model of EX 3200 switch. The maximum power available to each PoE port is 15.4 W.
Table 13: Minimum Power Requirements for an EX 3200 Switch
|
Model Number |
Number of PoE-enabled Ports |
Minimum Power Requirement |
|---|---|---|
|
EX 3200-24T |
8 |
320 W |
|
EX 3200-48T |
8 |
320 W |
|
EX 3200-24P |
24 |
600 W |
|
EX 3200-48P |
48 |
930 W |
Table 14 provides the minimum power requirements for each model of EX 4200 switch. The maximum power available to each PoE port is 15.4 W.
Table 14: Minimum Power Requirements for an EX 4200 Switch
|
Model Number |
Number of PoE-enabled Ports |
Minimum Power Requirement |
|---|---|---|
|
EX 4200-24T |
8 |
320 W |
|
EX 4200-48T |
8 |
320 W |
|
EX 4200-24P |
24 |
600 W |
|
EX 4200-48P |
48 |
930 W |
|
EX 4200-24F |
– |
320 W |
Table 15 describes the LEDs on the power supplies in EX-series switches.
Table 15: EX-series Switch—Power Supply LEDs
 |
Note: If AC OK LED and DC OK LED are unlit, it indicates that either the AC power cord is not installed properly or the power supply fuse has failed. If AC OK LED is lit and DC OK LED is unlit, it indicates that the AC power supply is not installed properly or the power supply has an internal failure. |
To avoid electrical injury, follow instructions in Installing an AC Power Supply in an EX-series Switch and Removing an AC Power Supply from an EX-series Switch carefully.
|
Note: After powering on an EX-series switch, wait for at least 60 seconds before powering it off. After powering off an EX-series switch, wait for at least 60 seconds before powering it back on. After powering on an EX-series switch, it can take up to 60 seconds for status indicators—such as LEDs on the power supply, show chassis command output, and messages on the craft interface LCD—to indicate that the power supply is functioning normally. Ignore error indicators that appear during the first 60 seconds. |