Chapter 2
Installing the Backup PSU
16
Backup PSU Installation Guide
Installing a second PSU Module into the Backup PSU
If you install a second PSU Module into the Backup PSU, you can connect the Backup PSU to two
Collage 740s. The Backup PSU supports the online insertion and removal of PSU Modules. You can
install a second PSU Module without powering off the Backup PSU.
Note:
Only attempt to replace the PSU Module whilst the power is connected if the switch has
Collage 740 software release 1.1 or later.
To install a second PSU Module into the Backup PSU:
1
Unscrew the blanking plate on the front of the Backup PSU and remove it.
2
Prepare the replacement module by pressing the ejectors away from the center of the card.
3
Supporting the underside of the module with one hand, line up the replacement module with
the card guides in the top-left slot that was occupied by the module that you removed.
4
Holding the ejectors with both hands, push the module towards the back of the unit.
Note:
If the module does not slide into the chassis smoothly, do not force it. Check that the module
is aligned with the card guides.
5
When you are sure that the module is fully seated in the backplane, press the ejectors on the
replacement PSU Module towards the center of the module. If the ejectors do not move easily,
gently push the module towards the rear of the unit to make sure that the module is seated
properly.
6
Using a flat-blade screwdriver, completely tighten the captive screw.
install.fm4 Page 16 Tuesday, August 13, 1996 2:05 PM
