Power supplies
The Z9432F-ON switch ships with two AC or DC power supplies. The two power supplies have two air-flow directions—from
the I/O to the PSU and from the PSU to the I/O.
CAUTION: PSU and fan airflow directions must match. To avoid damage to the switch, do not mix normal and
reverse airflows in a single switch.
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 Z9432F-ON 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.
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 to ensure proper airflow for cooling. 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 Z9432F-ON switch and components.
Topics:
• Components
• AC or DC power supply installation
• AC or DC power supply replacement
• DC power connections
Components
The following power supply options are available for the Z9432F-ON switch:
● AC or DC power supply with integrated fan
● AC or DC power supply with integrated reverse flow fan
NOTE:
Redundant AC power requires high-line 200 VAC to 240 VAC. Using low-line 120 VAC does not provide redundancy
for the switch.
When facing the PSU-side of the switch, power supply 1 (PSU1) is on the left side of the switch; power supply 2 (PSU2) is on
the right side of the switch.
1. PSUs
The PSUs have an integrated fan, which you cannot replace individually; if the fan integrated in a PSU fails, you must replace
the entire PSU. You can replace the fan trays individually. For fan tray replacement procedures, see Fans.
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Power supplies 29
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