Install Guide

● AC or DC PSU with fan airflow from the PSU to the I/O
Be sure to order the fans suitable to support your site’s ventilation. Use a single type of airflow fan in your system.
NOTE: DO NOT mix reverse and normal airflows in a single S4048T-ON chassis.
For proper ventilation, position the system 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 systems near each other, position the two chassis at least 5 inches (12.7 cm)
apart to permit proper airflow. The fan speed increases when the internal temperature reaches 132.8°F (56°C) and decreases
to normal speed when the temperature falls to 127.4°F (53°C). The S4048T-ON never intentionally turns off the fans.
Power
To connect the chassis to the applicable power source, use the appropriate power cord.
● If the switch is an AC model, a country/region-specific AC power cord is included with each PSU.
● If the switch is a DC model, a country/region-specific DC power cord is included with each DC power kit.
When installing AC systems, follow the requirements of the National Electrical Code, ANSI/NFPA 70 where applicable.
The system is powered-up when the power cord is connected between the system 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 system. Ensure that the socket-
outlet is located/installed near the equipment and is easily accessible.
Storing components
If you do not install your system and components immediately, Dell EMC recommends properly storing the system 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).
● Store on a dry surface or floor, away from direct sunlight, heat, and air conditioning ducts.
● Store in a dust-free environment.
NOTE:
ESD damage can occur when components are mishandled. Always wear an ESD-preventive wrist or heel ground
strap when handling the S4048T-ON and its accessories. After you remove the original packaging, place the S4048T-ON
and its components on an antistatic surface.
14 Site preparations