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Replacing Modules
Before you begin
You must turn off the circuit breaker for the DC power cables that you are connecting to prevent electrocution.
Step 1
Verify that the circuit breaker for the power feed to the replacement power supply is turned off.
Step 2
Remove the DC power connector block from the power supply by doing the following:
a) Push the orange plastic button on the top of the connector block inward toward the power supply.
b) Pull the connector block out of the power supply.
Step 3
Strip 0.6 inches (15 mm) of insulation off the DC wires that you are using.
Step 4
Orient the connector as shown in the following figure with the orange plastic button on top.
1
Wire retainer lever
2
Orange plastic button on top of the connector
3
-48V Return (+DC) cable
Step 5
Use a small screwdriver to depress the spring-loaded wire retainer lever on the lower spring-cage wire connector. Insert
your green (ground) wire into the aperture and then release the lever.
Step 6
Use a small screwdriver to depress the spring-loaded wire retainer lever on the middle spring-cage wire connector. Insert
your black (DC negative) wire into the aperture and then release the lever.
Step 7
Use a small screwdriver to depress the spring-loaded wire retainer lever on the upper spring-cage wire connector. Insert
your red (DC positive) wire into the aperture and then release the lever.
Step 8
Insert the connector block back into the power supply. Make sure that your red (DC positive) wire aligns with the power
supply label, "+ DC".
Step 9
Verify that the other ends of the cables are attached to the DC power source and ground. You are then ready to turn on
the DC power source.
4
-48V (-DC) cable
5
Grounding cable (8 AWG recommended)
Cisco Nexus 9272Q NX-OS Mode Switch Hardware Installation Guide
Wiring a 48 V DC Electrical Connector Block
41
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