Cisco AJ732A - MDS 9134 Fabric Switch Installation Manual page 115

Chapter 2 Installing the Cisco MDS 9500 Series
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m .
When installing or replacing the unit, the ground connection must always be made first and
Warning
disconnected last. Statement 1046
For more information on DC power supply in the MDS 9506 Director, see the
section on page
Figure 2-21
in the front of the PEM to connect them to the screws.
Figure 2-21
5
( )
1 Terminal block screws (+ and -)
2 Captive screw
3 Ring lug
Use 90-degree C fine-stranded copper conductors for North American installations.
Note
To provide power to a DC power supply in a Cisco MDS 9506 Director, follow these steps:
Step 1 Ensure that all power to the DC circuit is off by locating the circuit breaker on the panel board that
services the DC circuit. Switch the circuit breaker to the off position, and tape the switch handle of the
circuit breaker in the off position.
Ensure that the system (earth) ground connection is made. See the
Step 2
page
Loosen the captive screws on the DC PEM and pull the PEM partially out of the chassis to provide access
Step 3
to the PEM terminal block screws.
Connect the positive and negative DC cables to the DC PEM using a 10-32 ring lug for each cable, as
Step 4
follows:
a.
OL-17467-02
2-17.
shows the location of the terminal block screws and how to insert the lugs through the holes
DC PEM for a Cisco MDS 9506 Director
( )
4
3
2-17.
Identify the positive and negative DC cables and ensure that both are copper and sized per local and
national installation requirements.
( ) ( )
1
2
4 Exposed portion of positive cable
5 Insulated portion of negative cable
Cisco MDS 9500 Series Hardware Installation Guide
Starting Up the Switch
"System Grounding"
"System Grounding" section on
2-35