- play_arrow Fast Track: Initial Installation
- play_arrow Site Planning and Preparation
- play_arrow Initial Installation and Configuration
- play_arrow Maintain Components
- play_arrow Troubleshoot Hardware
- play_arrow Contact Customer Support and Return the Chassis or Components
- play_arrow Safety and Compliance Information
- Safety Information for EX4100-F
- General Safety Guidelines and Warnings
- Definitions of Safety Warning Levels
- Qualified Personnel Warning
- Warning Statement for Norway and Sweden
- Fire Safety Requirements
- Installation Instructions Warning
- Chassis and Component Lifting Guidelines
- Restricted Access Warning
- Ramp Warning
- Rack-Mounting and Cabinet-Mounting Warnings
- Grounded Equipment Warning
- Radiation from Open Port Apertures Warning
- Laser and LED Safety Guidelines and Warnings
- Maintenance and Operational Safety Guidelines and Warnings
- General Electrical Safety Guidelines and Warnings
- Action to Take After an Electrical Accident
- Prevention of Electrostatic Discharge Damage
- AC Power Electrical Safety Guidelines
- AC Power Disconnection Warning
- DC Power Electrical Safety Guidelines
- DC Power Disconnection Warning
- DC Power Grounding Requirements and Warning
- DC Power Wiring Sequence Warning
- DC Power Wiring Terminations Warning
- Multiple Power Supplies Disconnection Warning
- TN Power Warning
- Agency Approvals for EX Series Switches
- Compliance Statements for EMC Requirements for EX Series Switches
- Compliance Statements for Acoustic Noise for EX Series Switches
- Statements of Volatility for Juniper Network Devices
Cooling System and Airflow in an EX4100-F Switch
The cooling system in EX4100-F switch consists of fanless models and models with built-in fan(s). EX4100-F-12P and EX4100-F-12T switch models are fanless and rely on natural convection cooling. The airflow direction depends on the fan modules and power supplies installed in the switch.
Airflow Direction in EX4100-F Switch Models
Table 1 shows the direction of airflow in EX4100-F models as shipped.
Model Number | Fan Modules and Power Supply | Direction of Airflow |
|---|---|---|
| One built-in fan with AFO cooling. | Front-to-back—cold air to cool the chassis enters through the vents on the front panel of the chassis, and hot air exits through the vents on the rear panel of the chassis. |
| Two built-in fans with AFO cooling. | Front-to-back—cold air to cool the chassis enters through the vents on the front panel of the chassis, and hot air exits through the vents on the rear panel of the chassis. |
EX4100-F Switches with Front-to-Back Airflow
In EX4100-F switch models with front-to-back airflow, air enters through vents on the front panel to cool the chassis. The hot air then exits through the vents on the rear panel.
The front side of a switch is the side where the ports are located. The rear side is where the fans are located.
How to Position the Switch
Position the switch with front-to-back airflow in such a manner that the AIR OUT labels on the fan modules and power supplies are next to the hot aisle (see Figure 5).
Position the switch with back-to-front airflow in such a manner that the AIR IN labels on the fan modules and power supplies are next to the cold aisle (see Figure 6).
