4
Levels of redundancy
The RPS has three levels of redundancy:
Low: You’ll have a low level of redundancy when you connect only the
Main Power on the RPS. You’ll be protected against a device’s internal
power supply failing, but not against an electrical outage.
Medium: You’ll have a medium level of redundancy when you connect the
Main Power to one power grid and the Backup Power to a separate power
grid. You’ll be protected against a power grid failure, but not against a full
electrical outage.
High: You’ll have the highest level of redundancy when you connect the
Main Power to one power grid and the Backup Power to a battery source,
such as an Uninterruptable Power Supply (UPS). This ensures your devices
will stay powered even during a full electrical outage. See page 7 for
minimum UPS requirements.
Checking for problems
1
View the Power and Temperature/Fans LEDs on the RPS. These two
LEDs should always be green when the RPS is powered ON. If either
LED is red, there is a problem with the RPS unit.
2
View the four RPS status LEDs on the RPS. All should always be green
when the RPS is powered ON. If any LED is red, there is a problem
with the RPS unit.
3
View the Device status LEDs. These LEDs correspond to the hub or
switch connected to the back of the RPS. When a device is properly
connected and under its own power, the LED is solid green. When a
device’s power supply fails and the RPS is powering the device, the
LED is solid red. Follow the steps on page 5 to replace the device.
Resetting the audio alarm
The audio alarm sounds if:
•••••
Only one AC power cord is connected to the RPS.
•••••
You do not connect power cords to both the Main and Backup Power
within five seconds.
•••••
A device’s power supply fails.
•••••
An RPS’s internal power supply fails.
•••••
An RPS’s fan fails or the RPS unit overheats.
Using the RPS
Note
In general, if you see a red LED
anywhere on the RPS, you have a
problem.
The exception is the Power LED.
If you connected to only the Main
Power, the LED remains red.
Main Power
Backup Power
Main Power
Backup Power
