Power Supplies
Chassis and Power Supplies
page 2-14
OmniSwitch 7700/7800 Hardware Users Guide
April 2005
600 Watt DC-to-DC Power Supply
In addition to AC power supplies, OS7700 and OS7800 switches offer DC power support
(OS7-PS-0600D). As with the AC power supplies, DC supplies are installed in the power supply bays
located along the right side of the chassis. See
for a slot diagram showing the power supply bays.
DC Power Supply Front Panel
OVER
TEMP
DC OUT
OK
DC IN
OK
20A
48 - 60 V
A
A
A
A
(-)
(-)
(+)
(+)
DC IN OK (Top LED).
Displays solid green when
the power supply’s DC
input
status is OK and the
power supply is operating.
Off when the power supply
is not operating.
DC OUT OK (Middle
LED).
Displays solid green when
the power supply’s DC
out-
put
status is OK and the
power supply is operating.
Off when the power supply
is not operating.
OVER TEMP (Bottom
LED).
Off when the power
supply is operating under
supported temperature con-
ditions.
Displays solid amber when a
temperature error is detected
in the power supply hous-
ing. If a temperature error is
detected, check for an air-
flow obstruction at the air
intake vent or at the back of
the chassis. If no airflow
obstruction exists, remove or
replace the power supply
immediately. Refer to the
sections below for important
information on replacing
power supplies and power
supply redundancy.
Power Switch.
indicates
on
position;
indicates
off
position.
Power
Supply
LEDs
DC Power Connector Socket.
Anderson Powerpole modular
connector, or equivalent. The
connector socket ships factory-
installed in the power supply’s
front panel.
For information on the DC
power connectors, including
notes on connecting the power
cable, refer to
.
Safety Ground Connector.
A safety ground is provided
on each power supply and is
used to ground the OS7700/
OS7800 chassis.
For information on properly
connecting the ground, refer
to
.
Air Intake Vent.
The air
intake vent provides cooling
and temperature control for the
power supply. Maintain a front
clearance of at least six inches
to ensure proper airflow.
For additional airflow informa-
tion, refer to
Polarity Indicator Graphic.
Shows location of negative (-)
and positive (+) polarity con-
nectors on DC socket.
