Cisco Systems NPE-225, NPE-175 manual Stripping the DC-Input Lines

Chapter 9 Removing and Installing the NPE or NSE

Removing and Replacing the NPE or NSE

Figure 9-21 Stripping the DC-Input Lines

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57019

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0.55 in. (14 mm)

Step 4 Insert the stripped end of the ground lead all the way into the ground lead receptacle on the DC-input power supply and tighten the receptacle screw using a 3/16-inch flat-blade screwdriver.

Step 5 Insert the stripped end of the +V lead all the way into the +V lead receptacle and tighten the receptacle screw using the same 3/16-inch flat-blade screwdriver. Repeat this step for the –V lead.

Note Make sure that the entire stripped end of each lead is inserted all the way into its receptacle. If any exposed wire at the stripped end of a lead is visible after inserting the lead into its receptacle, remove the lead from the receptacle, use the wire stripper to cut the stripped end of the lead, and repeat through Step 5.

Step 6 After tightening the receptacle screws for the ground, +V, and –V DC-input leads, secure the leads to the power supply faceplate.

Use the cable tie you saved earlier in this procedure to secure the three leads.

Note When securing the ground, +V, and –V DC-input leads to the power supply faceplate, leave a small service loop in the ground lead to ensure that it is the last lead to disconnect from the power supply if a great deal of strain is placed on all three leads. (See Figure 9-20.)

Step 7 Restore current to the –V and +V leads.

Note For the Cisco 7200 series routers:

–Each DC-input power supply operating at 24 VDC requires a minimum of 19A service.

–Each DC-input power supply operating at 48 VDC requires a minimum of 13A service.

–Each DC-input power supply operating at 60 VDC requires a minimum of 8A service.

This product relies on the building’s installation for short-circuit (overcurrent) protection. Ensure that a listed and certified fuse or circuit breaker, 35A minimum 60 VDC, is used on all current-carrying conductors. Site wiring and circuit breakers need to be sized to accommodate the maximum values for safety reasons.

Step 8 Repeat Step 1 through Step 7 if a second power supply is installed.

This completes the steps for reconnecting DC-input power to a Cisco 7200 series router or a

Cisco 7200 VXR router. Proceed to the “Powering Up the Router” section on page 9-33.

Network Processing Engine and Network Services Engine Installation and Configuration

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