Preparation
2.1 Site Selection
The following criteria should be considered when selecting a site to install the switch:
Temperature and Ventilation: For proper ventilation, install the switch where there is ample airflow to the front and back of the switch. The ambient temperature should not go below 0° or exceed 40°C.
Important! To prevent the switch from overheating, do not operate it in an area where the ambient temperature exceeds 40°C (104°F).

Pour empêcher l’interrupteur de surchauffe, ne pas utiliser il dans une zone où la température ambiante est supérieure à 40°C (104°F).
Airflow Orientation: Determine airflow direction of the fan modules on the rear panel and the power supply modules on the front panel. Fan and power supply module handles indicate airflow direction:
Blue Handle: Air Inlet module.
Red Handle: Air Exit module.
Figure 2-1 displays fan and power supply module locations on the device. Base the switch orientation on the airflow direction of the modules to assure the air inlet is always oriented toward the cool aisle. For DCS-7020SR-32C2, ensure that the fan module and the power supply module have opposite airflow orientations.
Air Exit modules: orient the rear panel toward the hot aisle.
Air Inlet modules: orient the rear panel toward the cool aisle.
If the airflow direction is not compatible with the installation site, contact your sales representative to obtain modules that circulate air in the opposite direction.
Rack Space: Install the switch in a 19" rack or cabinet. The switch height is 1 RU. The accessory kit provides mounting brackets for two-post and four-post racks.
When mounting the switch in a partially filled rack, load the rack from bottom to top, with the heaviest equipment at the bottom. Load the switch at the bottom if it is the only item in the rack.
Power Requirements: Power requirements vary by switch and power supply model. Refer to Table 1-3 and Table 1-4 for information regarding your specific system.
Two circuits provide redundancy protection. Section 4.1 describes power cable requirements.
Figure 2-1: Airflow Direction
Important! The power input plug-socket combination must be accessible at all times; it provides the primary method of disconnecting power from the system.

La combinaison de la puissance-prise d’entrée doit être accessible en tout temps ; Il fournit le principal moyen de coupure d’alimentation du système.
Other Requirements: Select a site where liquids or objects cannot fall onto the equipment and foreign objects are not drawn into the ventilation holes. Verify these guidelines are met:
Clearance areas to the front and rear panels allow for unrestricted cabling.
All front and rear panel indicators can be easily read.
Power cords can reach from the power outlet to the connector on the rear panel.
Important! All power connections must be removed to de-energize the unit.

Toutes les connexions d’alimentation doivent être enlevées pour hors tension l’appareil.
2.2 Tools and Parts Required for Installation
Each switch provides an accessory kit that contains parts that are required to install the switch. In addition to the accessory kit, the following tools and equipment are required to install the switch:
Two-Post Rack
Screws or rack mounting nuts and bolts.
Screwdriver
Note For DCS-7020SR-32C2, four-post rack kits are optional and sold separately.
Four-Post Rack (Tool-less)
No additional equipment required.
Four-Post Rack (Conventional)
Screws or rack mounting nuts and bolts.
Screwdriver
Accessory kit does not include screws for attaching the switch to the equipment rack. When installing the switch into an equipment rack with unthreaded post holes, nuts are also required to secure the switch to the rack posts.
2.3 Electrostatic Discharge (ESD) Precautions
Observe these guidelines to avoid ESD damage when installing or servicing the switch.
Assemble or disassemble equipment only in a static-free work area.
Use a conductive work surface (such as an anti-static mat) to dissipate static charge.
Wear a conductive wrist strap to dissipate static charge accumulation.
Minimize handling of assemblies and components.
Keep replacement parts in their original static-free packaging.
Remove all plastic, foam, vinyl, paper, and other static-generating materials from the work area.
Use tools that do not create ESD.