2-16
October, 1998
GRF 400/1600 Getting Started - 1.4 Update 2
Getting Acquainted with the GRF 1600
Description of the 48VDC power supplies
Description of the 48VDC power supplies
The GRF 1600 1100W DC power supply pr48V to the fans and +5.0V to all media
cards, and the control board, switch board, and backplane. Directions for attaching DC input
wiring to the DC power supply are in chapter 3.
The GRF 1600 does not have a chassis-based power switch. Instead, each DC power supply
has its own on/off switch. You cannot put the switch to on unless the power supply drawer is
properly inserted into the chassis. The DC drawer has a locking tab that prevents the drawer
from being pulled out while the switch is on. You must switch the power off and drop the
locking tab down before you can remove a power supply. Refer to Figure 2-8.
Figure 2-8. Front panel of GRF 1600 DC power supply
Locking tab is in down (drawer unlocked) position
Locking tab in up (drawer locked) position
Finger lift
Drawer handle
Power supply
air intake fan
On / off switch
is locked off
Power supply is locked in place,
switch can be on