Install Guide

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 grounding your switch. Use the S4200-ON Series switch in a CBN.
Connect the grounding cables as described in S4200–ON Series Installation.
Fans and airflow
The S4200-ON Series (S4248FB-ON and S4248FBL-ON) switch fans support two airflow options: normal and reverse.
Fan combinations
Installation of the fans is done as part of the factory install based on stock keeping unit (SKU) type. The S4200-ON Series has
SKUs that support the following configurations:
● AC or DC PSU with fan airflow from the I/O to the PSU—the red indicator is the normal airflow.
● AC or DC PSU with fan airflow from the PSU to the I/O—the blue indicator is the reverse airflow.
Be sure to order the fans suitable to support your site’s ventilation. Use a single type of airflow fan in your switch. Do not mix
reverse and normal airflows in a single S4200-ON Series switch.
For proper ventilation, position the switch 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 S4200-ON Series switches near each other, to permit proper airflow, position
the two switches at least 5 inches (12.7 cm) apart. The fan speed varies based on internal temperature monitoring. The S4200-
ON Series never intentionally turns off the fans.
For more information, see Fans.
Power
Use the appropriate power cord with the S4200-ON Series (S4248FB-ON and S4248FBL-ON) when connecting the switch to
the power source. An AC power cord is included with each PSU.
When installing AC or DC 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. For more information,
see Power Supplies.
CAUTION:
Always disconnect the power cable before you service the power supply slots. The switch has
multiple power cords. Before servicing, ensure all power cords are disconnected.
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.
NOTE: Module power is software controlled. You do not see module LEDs when the switch powers up in ONIE.
Component storage
If you do not install your S4200-ON Series (S4248FB-ON and S4248FBL-ON) switch and components immediately, properly
store the switch and all optional components by following these guidelines:
● Storage location temperature must remain constant. The storage range is from -40°C to 70°C (-40°F to 158°F).
14
Site preparations