Dell S4148F-ON Series - Power supplies

Power supplies
The S4100–ON Series (S4128F-ON and S4148F-ON) switch ships with two AC or DC power supplies.
The power supplies have two air-ow directions, normal and reverse. Normal is from the I/O-side to the PSU-side. Reverse is from the
PSU-side to the I/O-side.
The PSUs are eld replaceable. When running with full redundancy—two power supplies installed and running, you can remove and replace
one PSU without disrupting trac.
CAUTION: To prevent electrical shock, ensure that the switch is grounded properly. If you do not ground your equipment
correctly, excessive emissions may result. Use a qualied electrician to ensure that the power cables meet your local electrical
requirements.
NOTE: Connect the power supply to the appropriate branch circuit protection as dened by your local electrical codes and verify
that the remote power source complies with the switch input power specications.
NOTE: If you use a single PSU, install a blank plate in the other PSU slot. Use power supply 2 (PSU2) as the blank plate slot. To
install the blank plate, use a #1 Philips screw driver.
NOTE: ESD damage can occur if components are mishandled. Always wear an ESD-preventive wrist or heel ground strap when
handling the S4100F–ON Series switch and its components.
Topics:
• Components
• AC or DC power supply installation
• DC power supply connection
Components
The following power supply options are available for the S4100–ON Series (S4128F-ON and S4148F-ON) switch:
• AC or DC power supply with integrated fan
• AC or DC power supply with integrated reverse ow fan
Power supply 1 (PSU1) is on the left side of the switch; power supply 2 (PSU2) is on the right side of the switch.
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Power supplies 29