Power supplies
The S4112–ON Series (S4112F-ON and S4112T-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.
CAUTION: To prevent electrical shock, ensure that the S4112-ON Series switch is grounded properly. If you do not ground your
equipment correctly, excessive emissions may result. Use a qualied electrician to ensure that the power cables meet your local
electrical requirements.
NOTE: Connect the power supply to the appropriate branch circuit protection as dened by your local electrical codes and verify
that the remote power source complies with the switch input power specications.
NOTE: ESD damage can occur if components are mishandled. Always wear an ESD-preventive wrist or heel ground strap when
handling the S4112–ON Series switch and its components.
Topics:
• Components
• DC power connections
Components
The AC or DC power supply option is available for the S4112–ON Series (S4112F-ON and S4112T-ON) switch.
Power supply unit 1 (PSU1) is on the inner-right side of the switch; power supply unit 2 (PSU2) is on the outer-right side of the switch.
Figure 21. S4112F–ON AC PSUs
1
AC PSUs
Figure 22. S4112F–ON DC PSUs
1
DC PSUs
5
28 Power supplies
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