SMD 989
– User Manual
Page 18 (105)
SMD 952 Option (Dual Redundant AC Power Supply)
The SMD 952 Option Dual Redundant AC Power Supply provides a redundant hot swappable
power supply for the unit. If either power supply fails the backup supply will be automatically
activated. A power supply failure event will result in an audible alarm notification along with Front
Panel and GUI Error notification. The audible alarm can be reset on by pressing the red button on
power supply module. The faulty supply can then be removed and replaced without the need to
power down the unit or remove the unit from the rack.
Figure 10: SMD 952 Dual Redundant AC Power Supply
SMD 954 Option (Dual Redundant DC Power Supply)
The SMD 952 Option Dual Redundant DC Power Supply provides a redundant hot swappable
power supply for the unit. If either power supply fails the backup supply will be automatically
activated. A power supply failure event will result in an audible alarm notification along with Front
Panel and GUI Error notification. The audible alarm can be reset on by pressing the red button on
power supply module. The faulty supply can then be removed and replaced without the need to
power down the unit or remove the unit from the rack.
Figure 11: SMD 954 Dual Redundant DC Power Supply