Connecting an 1100 W DC Power Supply to the Source Voltage
Summit 1100 W DC power supply units must connect to a –48V
source.
The DC power connection at your facility must be made by a qualified electrician,
following these instructions.
![Warning](./images/Warning_Note.png)
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](./images/Caution_Note.png)
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.
-
Verify that the ground wire is attached to the
power supply.
-
Insert a screwdriver into both slots on the top of
the terminal connector and loosen the screws enough to accommodate a stripped
power input cable.
-
Insert the DC power cables into the
connector.
-
Slide the end of the positive wire (–48 V RTN) into the positive terminal (labeled +, on the left side of the
connector).
-
Tighten the screw on the top of the
positive terminal connector to between 4.4 in‑lb (0.50 N m) and 7.1
in‑lb (0.8 N m).
-
Slide the end of the negative wire (–48 V) into the negative terminal (labeled –, on the right side of the
connector).
-
Tighten the screw on the top of the
negative terminal connector to between 4.4 in‑lb (0.50 N m) and 7.1
in‑lb (0.8 N m).
-
Insert the connector into the slot on the power
supply.
- Connect the cables to the
DC source voltage, using hardware appropriate to the installation site and following
local and national electrical codes.
- Energize the DC circuit.
Leave the ESD strap permanently connected to the
rack, so that the strap is always available when you need to handle ESD-sensitive
components.
Connect network interface cables to the switch, using the
instructions in Connecting Network Interface Cables.