Juniper Networks EX4300 Power Supplies

EX4300 350 W AC power supply

Front-to-back airflow

Each power supply has its own fan and is cooled by its own internal cooling system.

Front-to-back—that is, air intake to cool the chassis is through the vents on the front panel of the chassis and hot air exhausts through the vents on the rear panel of the chassis.

Each AC power supply has a single AC appliance inlet that requires a dedicated AC power feed. A detachable AC power cord is supplied with each AC power supply.




To install an AC power supply in the switch:

1. Ensure that you have the correct power supply. The label AIR IN (AFI) or AIR OUT (AFO) on the power supply must match the label AIR IN (AFI) or AIR OUT (AFO) on the installed fan module.

2. Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD point on the chassis.

3. If the power supply slot has a cover panel on it, loosen the captive screws on the cover panel by using your fingers or the screwdriver. Hold the captive screw and gently pull it outward to remove the cover panel. Save the cover panel for later use.

4. Taking care not to touch power supply pins, leads, or solder connections, remove the power supply from the bag.

5. Using both hands, place the power supply in the power supply slot on the rear panel of the switch and slide it in until it is fully seated and the ejector lever fits into place.

EX4300 350 W AC power supply with airflow in

Back-to-front airflow

Each power supply has its own fan and is cooled by its own internal cooling system.

Back-to-front—that is, air intake to cool the chassis is through the vents on the rear panel of the chassis and hot air exhausts through the vents on the front panel of the chassis.

Each AC power supply has a single AC appliance inlet that requires a dedicated AC power feed. A detachable AC power cord is supplied with each AC power supply.




To install an AC power supply in the switch:

1. Ensure that you have the correct power supply. The label AIR IN (AFI) or AIR OUT (AFO) on the power supply must match the label AIR IN (AFI) or AIR OUT (AFO) on the installed fan module.

2. Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD point on the chassis.

3. If the power supply slot has a cover panel on it, loosen the captive screws on the cover panel by using your fingers or the screwdriver. Hold the captive screw and gently pull it outward to remove the cover panel. Save the cover panel for later use.

4. Taking care not to touch power supply pins, leads, or solder connections, remove the power supply from the bag.

5. Using both hands, place the power supply in the power supply slot on the rear panel of the switch and slide it in until it is fully seated and the ejector lever fits into place.

EX4300 550 W DC power supply

Front-to-back airflow

The DC power supply in EX4300 switches is a hot-insertable and hot-removable field-replaceable unit (FRU): You can install it without powering off the switch or disrupting the switching function.

Front-to-back—that is, air intake to cool the chassis is through the vents on the front panel of the chassis and hot air exhausts through the vents on the rear panel of the chassis.

Each power supply has its own fan and is cooled by its own internal cooling system.

Each power supply has a label AIR OUT (AFO) or AIR IN (AFI) on the faceplate of the power supply that indicates the direction of airflow in the power supply.




To install an AC power supply in the switch:

1. Ensure that you have the correct power supply. The label AIR IN (AFI) or AIR OUT (AFO) on the power supply must match the label AIR IN (AFI) or AIR OUT (AFO) on the installed fan module.

2. Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD point on the chassis.

3. If the power supply slot has a cover panel on it, loosen the captive screws on the cover panel by using your fingers or the screwdriver. Hold the captive screw and gently pull it outward to remove the cover panel. Save the cover panel for later use.

4. Taking care not to touch power supply pins, leads, or solder connections, remove the power supply from the bag.

5. Using both hands, place the power supply in the power supply slot on the rear panel of the switch and slide it in until it is fully seated and the ejector lever fits into place.

EX4300 550 W DC power supply with air flow in

Back-to-front airflow

The DC power supply in EX4300 switches is a hot-insertable and hot-removable field-replaceable unit (FRU): You can install it without powering off the switch or disrupting the switching function.

Back-to-front—that is, air intake to cool the chassis is through the vents on the rear panel of the chassis and hot air exhausts through the vents on the front panel of the chassis.

Each power supply has its own fan and is cooled by its own internal cooling system.

Each power supply has a label AIR OUT (AFO) or AIR IN (AFI) on the faceplate of the power supply that indicates the direction of airflow in the power supply.




To install an AC power supply in the switch:

1. Ensure that you have the correct power supply. The label AIR IN (AFI) or AIR OUT (AFO) on the power supply must match the label AIR IN (AFI) or AIR OUT (AFO) on the installed fan module.

2. Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD point on the chassis.

3. If the power supply slot has a cover panel on it, loosen the captive screws on the cover panel by using your fingers or the screwdriver. Hold the captive screw and gently pull it outward to remove the cover panel. Save the cover panel for later use.

4. Taking care not to touch power supply pins, leads, or solder connections, remove the power supply from the bag.

5. Using both hands, place the power supply in the power supply slot on the rear panel of the switch and slide it in until it is fully seated and the ejector lever fits into place.

EX4300 715 W AC power supply

Front-to-back airflow

Each power supply has its own fan and is cooled by its own internal cooling system.

Front-to-back—that is, air intake to cool the chassis is through the vents on the front panel of the chassis and hot air exhausts through the vents on the rear panel of the chassis.

Each AC power supply has a single AC appliance inlet that requires a dedicated AC power feed. A detachable AC power cord is supplied with each AC power supply.




To install an AC power supply in the switch:

1. Ensure that you have the correct power supply. The label AIR IN (AFI) or AIR OUT (AFO) on the power supply must match the label AIR IN (AFI) or AIR OUT (AFO) on the installed fan module.

2. Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD point on the chassis.

3. If the power supply slot has a cover panel on it, loosen the captive screws on the cover panel by using your fingers or the screwdriver. Hold the captive screw and gently pull it outward to remove the cover panel. Save the cover panel for later use.

4. Taking care not to touch power supply pins, leads, or solder connections, remove the power supply from the bag.

5. Using both hands, place the power supply in the power supply slot on the rear panel of the switch and slide it in until it is fully seated and the ejector lever fits into place.

EX4300 1400 W AC power supply

Front-to-back airflow

for EX4300-48MP

Each power supply has its own fan and is cooled by its own internal cooling system.

Front-to-back—that is, air intake to cool the chassis is through the vents on the front panel of the chassis and hot air exhausts through the vents on the rear panel of the chassis.

Each AC power supply has a single AC appliance inlet that requires a dedicated AC power feed. A detachable AC power cord is supplied with each AC power supply.




To install an AC power supply in the switch:

1. Ensure that you have the correct power supply. The label AIR IN (AFI) or AIR OUT (AFO) on the power supply must match the label AIR IN (AFI) or AIR OUT (AFO) on the installed fan module.

2. Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD point on the chassis.

3. If the power supply slot has a cover panel on it, loosen the captive screws on the cover panel by using your fingers or the screwdriver. Hold the captive screw and gently pull it outward to remove the cover panel. Save the cover panel for later use.

4. Taking care not to touch power supply pins, leads, or solder connections, remove the power supply from the bag.

5. Using both hands, place the power supply in the power supply slot on the rear panel of the switch and slide it in until it is fully seated and the ejector lever fits into place.

EX4300 1100 W AC power supply

Front-to-back airflow

Each power supply has its own fan and is cooled by its own internal cooling system.

Front-to-back—that is, air intake to cool the chassis is through the vents on the front panel of the chassis and hot air exhausts through the vents on the rear panel of the chassis.

Each AC power supply has a single AC appliance inlet that requires a dedicated AC power feed. A detachable AC power cord is supplied with each AC power supply.




To install an AC power supply in the switch:

1. Ensure that you have the correct power supply. The label AIR IN (AFI) or AIR OUT (AFO) on the power supply must match the label AIR IN (AFI) or AIR OUT (AFO) on the installed fan module.

2. Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD point on the chassis.

3. If the power supply slot has a cover panel on it, loosen the captive screws on the cover panel by using your fingers or the screwdriver. Hold the captive screw and gently pull it outward to remove the cover panel. Save the cover panel for later use.

4. Taking care not to touch power supply pins, leads, or solder connections, remove the power supply from the bag.

5. Using both hands, place the power supply in the power supply slot on the rear panel of the switch and slide it in until it is fully seated and the ejector lever fits into place.