Two 750 W DC power supplies are available: model XN-DCPWR-750W-F (front-to-back
airflow) and model XN-DCPWR-750W-R (back-to-front airflow). Both can connect to a
–48 V power source.
The DC power connection at your facility must be made by a qualified electrician,
following these instructions.
Warning
Always make sure that the DC circuit is de-energized before connecting or disconnecting
the DC power cables on the DC power supply.
Caution
Provide proper
connection and strain relief on the DC power cables in accordance with all local and
national electrical codes.
- Verify that the DC circuit
is de-energized.
- Attach an
ESD-preventive wrist strap to your bare wrist and connect the metal end to an
appropriate ground point on the rack.
-
Connect the negative wire
(–48 V) to the power supply as follows:
-
Insert the stripped end of the wire all the way into the leftmost of
the three slots on the terminal block.
-
Insert a #1 Phillips
screwdriver into the hole below the slot, and tighten.
-
Gently tug the wire to make sure it is fastened securely.
-
Connect the positive wire
(–48 V) as follows:
-
Insert the stripped end of the wire all the way into the rightmost of
the three slots on the terminal block.
-
Insert a #1 Phillips
screwdriver into the hole below the slot, and tighten.
-
Gently tug the wire to make sure it is fastened securely.
- Connect the cables to the
DC source voltage, using hardware appropriate to the installation site and following
local and national electrical codes.
Turn on the switch, following the steps in Connecting Power to the Switch.
Leave the ESD strap permanently connected to the
rack, so that the strap is always available when you need to handle ESD-sensitive
components.
