OmniSwitch 6850/6850E Series Power Supplies
OmniSwitch 6850/6850E Series Power Supplies
page 4-16
OmniSwitch 6850/6850E Series Hardware Users Guide
June 2011
You can also attach the power supplies to the back of a chassis directly as well as using cables at the same
time, as shown in the diagram below.
Redundant Large Power Supplies
DC Power Supply Considerations
In addition to the installation steps described in
“Connecting a Power Supply Directly to the Chassis” on
page 4-11
and
“Connecting a Power Supply with a Cable” on page 4-12
DC power supplies (e.g., the PS-
120W-DC) have the following additional considerations:
•
Connect to a -48V or -60V reliably grounded DC SELV source.
•
Use common DC return connections for the DC power supplies. The DC return terminal conductor
should be connected to the equipment frame.
•
The Branch Circuit Overcurrent Protection must be rated a Maximum of 15A.
•
Use 12AWG solid conductors only.
•
A readily accessible disconnect device that is suitably approved and rated shall be incorporated in the
field wiring.
Twisted pair wire (red and black) for a DC power supply
Note.
Refer to the wiring diagram for information on connecting the DC power supply to a DC power
source.
17.6 inches
MIN 1 TURN PER 1.5
HALF TURN PER .75
Black
Red
