4
1. Prior to Starting
The HVS-49PSM power supply unit is specifically designed for the HVS-490. A standard HVS-490
comes with a single power supply unit installed into one of its two power slots. The optional
HVS-49PSM power supply unit allows you to operate the unit continuously, even if one power supply
unit fails.
CAUTION
Installing this option, which requires accessing the unit interior by opening the
panel, should only be done by qualified technical personnel. Power should be
turned OFF and all power cords disconnected from the unit before performing
this installation.
2. Installing the HVS-49PSM
2-1. Removing the Front Panel
Loosen the two screws on the front panel as shown below, then remove the panel.
2-2. Removing the Power Supply Slot Blank Panel
Remove the two screws securing the blank panel covering the power slot at the front of the unit
then remove the blank panel.
Screw
Screw
Screw
Screw
