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The S4200-ON Series (S4248FB-ON and S4248FBL-ON) switch ships with two AC or DC power supplies.

The S4200-ON Series switch supports AC or DC power supplies with two air-flow directions, normal and reverse. Normal is from the I/O 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.

CAUTION:

To prevent electrical shock, ensure that the S4200-ON Series 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 S4200-ON Series switch and its components.

Topics:

•

•

AC or DC power supply installation

•

Connect DC power supply to power source

Components

The following power supply options are available for the S4200-ON Series (S4248FB-ON and S4248FBL-ON) 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.

Power supplies