Setup Guide
The cabinet must meet minimum size requirements. Airow must be in accordance with the Electronic Industries Alliance (EIA) standard.
Ensure that there is a minimum of 5 inches (12.7 cm) between the intake and exhaust vents and the cabinet wall.
Rack mounting
When you prepare your equipment rack, ensure that the rack is grounded.
Ground the equipment rack to the same ground point the power service in your area uses. The ground path must be permanent.
Switch ground
Dell EMC recommends you ground you switch. Use the S4048–ON in a common bond network (CBN).
Connect the grounding cables as described in Install the S4048–ON.
Fans and airow
The S4048–ON fans support two airow options.
Fan combinations
The S4048-ON has stock keeping units (SKUs) that support the following congurations. Installation of the fans is done as part of the
factory install based on SKU type.
• AC PSU with fan airow from the I/O-side to the PSU-side
• AC PSU with fan airow from the PSU-side to the I/O-side
Be sure to order the fans suitable to support your site’s ventilation. Use a single type of airow fan in your switch. Do not mix reverse and
normal air ows in a single S4048–ON chassis.
For proper ventilation, position the S4048-ON in an equipment rack (or cabinet) with a minimum of 5 inches (12.7 cm) of clearance around
the exhaust vents. When you install two S4048-ON switches near each other, position the two chassis at least 5 inches (12.7 cm) apart to
permit proper airow. The fan speed increases when the internal temperature reaches 161.6°F (72°C) and decreases to normal speed
when the temperature falls to 136.4°F (58°C). The S4048-ON never intentionally turns o the fans.
Power
To connect the chassis to the applicable power source, use the appropriate power cord with the S4048–ON. An AC power cord is included
with the switch.
When installing AC switches, follow the requirements of the National Electrical Code, ANSI/NFPA 70 where applicable.
The switch is powered-up when the power cord is connected between the switch and the power source.
CAUTION
: Always disconnect the power cable before you service the power supply slots.
CAUTION: Use the power supply cord as the main disconnect device on the AC switch. Ensure that the socket-outlet is located/
installed near the equipment and is easily accessible.
Storing components
If you do not install your S4048–ON and components immediately, Dell EMC recommends properly storing the switch and all optional
components by following these guidelines.
• Storage location temperature must remain constant ranging from -40° to 158°F (from -40°C to 70°C).
Site preparations
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