Important: Y
ou should use only one power supply unit (PSU) type (AC or DC) in a platform. AC and DC
interoperability is not supported.
Important: The platform must be installed in a RESTRICTED ACCESS LOCA
TION, such as a central
office or customer premises environment.
Note: Copper cables used for gr
ounding must meet appropriate safety standards.
Note: Bar
e conductors should be coated with an appropriate antioxidant before being crimped. Make
sure to clean all unplated connectors, braided strap, and bus bars to a bright finish prior to coating them
with the antioxidant.
Note: The platform must be gr
ounded to a common bonding network (CBN).
Note: The battery r
eturn terminals on the platform are in an isolated DC return (DC-I) configuration.
Note: When you ar
e running a redundant DC power supply configuration, F5
®
strongly recommends that
each DC power supply unit (PSU) in the system receives power from independent DC main power
sources with independent circuit breakers.
Note: After r
emoving input power from any power supply unit (PSU), wait 30 seconds before reapplying
input power to the PSU.
Replace a DC power supply
Before you perform a DC power supply unit (PSU) replacement, you need to provide these tools and
components:
•
12 AWG copper cable long enough to reach from the platform to the DC power source
• Flat-head or Philips head screwdriver
In the event of a power supply unit (PSU) failure, you can replace a DC PSU in your system. For a dual-
supply system, you can perform the replacement without powering down the system, provided that there
is at least one PSU operating during the replacement process.
Caution: Be sure that you are using the correct wattage and part number (PWR-XXXX) of power supply
unit (PSU) in all bays, as applicable, when performing a power supply replacement.
Note: All photos shown ar
e examples. The appearance of your power supply units might vary slightly, but
be sure to use the pull handle orientation and perforations in the power cord face to verify the correct
PSU for your platform.
1. Prepare the system for PSU replacement:
•
For a single-supply system, use the touchscreen LCD to halt and power off the system.
• For a dual-supply system, make sure that you have an operational supply already installed in your
system if you want to hot swap a supply while the system is running. If you do not want to hot
swap, you can perform the replacement with the system powered off.
2. Be sure that the circuit breaker for the DC mains power source is switched off.
3. Remove the failed DC PSU by squeezing the ejector latch and pulling straight toward you.
Platform Maintenance
38
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