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Changing the Power Supplies
The SC227TS chassis has two redundant power supplies. The power modules are hot-
swappable, enabling the power supplies to be changed without powering down the system.
These power supplies are auto-switching capable. This enables the power supply to
automatically sense and operate at a 100v to 240v input voltage. An amber light will be
illuminated on the power supply when the power is off. An illuminated green light indicates
that the power supply is operating.
Changing a Power Supply
1. Determine which power supply needs to be replaced and unplug the power cord to that
module.
2. Push the release tab (on the back of the power supply) as illustrated, to release the
power module from the chassis.
3. While holding down the release tab, pull the power supply out using the handle provided
on the power module.
4. Replace the failed power module with the same model power supply.
5. Push the new power supply module into the power bay until the tab clicks into the
locked position.
6. Plug the AC power cord back into the power module and the module will automatically
power-up.
3
Release Tab
Chapter 3: Maintenance and Component Installation
Figure 3-10. Removing the Power Supply
46
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