- Notes, Cautions, and Warnings
- About this guide
- The S4048–ON switch
- Site preparations
- NEBS compliance
- S4048–ON installation
- Power supplies
- Fans
- Management ports
- Specifications
- Chassis physical design
- IEEE standards
- Agency compliance
- Network Equipment Building Systems Compliance
- USA Federal Communications Commission Statement
- European Union EMC Directive Conformance Statement
- Japan VCCI Compliance for Class A Equipment
- Korean Certification of Compliance
- Safety Standards and Compliance Agency Certifications
- Electromagnetic Compatibility
- Product recycling and disposal
- Technical Support
Dell EMC PowerSwitch S4048-ON Installation Guide March 2021
Power supplies
The S4048–ON ships with one AC power supply. Dell EMC recommends purchasing a second power supply.
The S4048–ON supports AC power supplies with 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. Two PSUs are required for full redundancy, but the switch can operate with a single PSU.
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.
NOTE: If you use a
single PSU, install a blank plate in the other PSU slot. Dell EMC
recommends using power supply 2 (PSU2) as the blank plate slot.
NOTE: ESD damage can
occur if components are mishandled. Always wear an ESD-preventive
wrist or heel ground strap when handling the S4048–ON and its components.
CAUTION: To prevent electrical shock, ensure that the S4048-ON 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.
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