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Wiring a 48 V DC Electrical Connector Block
Warning
Statement 1024 Ground Conductor
This equipment must be grounded. To reduce the risk of electric shock, never defeat the ground conductor or
operate the equipment in the absence of a suitably installed ground conductor. Contact the appropriate electrical
inspection authority or an electrician if you are uncertain that suitable grounding is available.
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".
Cisco Nexus 93128TX ACI-Mode Switch Hardware Installation Guide
46
4
-48V (-DC) cable
5
Grounding cable (8 AWG recommended)
Replacing Modules
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