Dell S4148U-ON EMC PowerSwitch S4100–ON Series Installation Guide M - Page 33

Power supplies, Components

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5 Power supplies The S4100-ON Series (S4128F-ON, S4148F-ON, S4148FE-ON, S4128T-ON, S4148T-ON, and S4148U-ON) switch ships with two AC or DC power supplies. The power supplies have two air-flow 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 field replaceable. When running with full redundancy-two power supplies installed and running, you can remove and replace one PSU without disrupting traffic. 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 qualified electrician to ensure that the power cables meet your local electrical requirements. NOTE: Connect the power supply to the appropriate branch circuit protection as defined by your local electrical codes and verify that the remote power source complies with the switch input power specifications. 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 S4100-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 switch: ● AC or DC power supply with integrated fan ● AC or DC power supply with integrated reverse flow 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. Figure 23. S4100-ON Series PSUs 1. PSUs The PSUs have an integrated fan that you cannot replace individually; if the fans integrated in a PSU fail, you must replace the entire PSU. You can replace the fan trays individually. For fan tray replacement procedures, see Fans. WARNING: Prevent exposure and contact with hazardous voltages. Do not attempt to operate this switch with the safety cover removed. Power supplies 33

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Power supplies
The S4100–ON Series (S4128F-ON, S4148F-ON, S4148FE-ON, S4128T-ON, S4148T-ON, and S4148U-ON) switch ships with
two AC or DC power supplies.
The power supplies have two air-flow 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 field replaceable. When running with full redundancy—two power supplies installed and running, you can remove
and replace one PSU without disrupting traffic.
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 qualified electrician to ensure that the power cables
meet your local electrical requirements.
NOTE:
Connect the power supply to the appropriate branch circuit protection as defined by your local electrical codes and
verify that the remote power source complies with the switch input power specifications.
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 S4100–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 switch:
●
AC or DC power supply with integrated fan
●
AC or DC power supply with integrated reverse flow 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.
Figure 23. S4100-ON Series PSUs
1.
PSUs
The PSUs have an integrated fan that you cannot replace individually; if the fans integrated in a PSU fail, you must replace the
entire PSU. You can replace the fan trays individually. For fan tray replacement procedures, see
Fans
.
WARNING:
Prevent exposure and contact with hazardous voltages. Do not attempt to operate this switch with
the safety cover removed.
5
Power supplies
33