Wiring A 48 V Dc Electrical Connector Block - Cisco Nexus 9396PX Hardware Installation Manual
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Replacing Modules
• All DC power supplies have reverse polarity protection. When you inadvertently connect the input power
Step 1
Holding the replacement power supply with one hand underneath the module and the other hand holding the handle, turn
the power supply so that its release latch is on the right side and align the back end of the power supply (the end with the
electrical connections) to the open power supply slot before carefully sliding the power supply all the way into the slot
until it clicks into place.
Note
If the power supply does not fit into the open slot, turn the module over before carefully sliding it into the
open slot.
Step 2
If the DC power cables and a grounding cable are already connected to an electrical connector block, insert the block
into the power receptacle on the power supply.
Step 3
Turn on the circuit breaker for the DC power source connected to the power supply.
Step 4
Verify that the power supply is operational by making sure that the power supply
Wiring a 48 V DC Electrical Connector Block
You must connect the ground, negative, and positive DC power cables to a connector block in order to connect
the power cables to a 48 V DC power supply.
Note
Warning
Warning
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:
(+) to the DC PSU's – terminal and the input power – to the DC PSU's (+) terminal, the PSU will not
be damaged and will operate fine after the input power feeds are correctly wired.
The recommended wire gauge is 8 AWG. The minimum wire gauge is 10 AWG.
Statement 342 Before Connecting to System Power Supply
High touch/leakage current – Permanently connected protective earth ground is essential before connecting
to system power supply.
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.
Cisco Nexus 9396PX ACI-Mode Switch Hardware Installation Guide
Wiring a 48 V DC Electrical Connector Block
LED is green.
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