Cisco Systems 7500 Series manual H2530

Chapter 6 Maintaining Your Cisco 7507 and Cisco 7507-MX Router

Maintenance Procedures for the Cisco 7507 and Cisco 7507-MX

Figure 6-1 Power Supply Interlock (Cisco 7507 and Cisco 7507-MX AC-Input Power Supply

Shown)

I

	O
		H1315a
	Safety interlock	Locking device
		in ON and
Cable-retention clip	switch	locked positions

Step 3 Disconnect the power cable from the power source.

Step 4 For the AC-input power supply: Lift up the cable retention clip and remove the power cable from the AC receptacle.

For the DC-input power supply: Loosen the captive installation screws on the terminal block cover, lift the cover, use the wire cutters to cut the nylon strain-relief ties, and then remove the three power leads (remove the ground lead last) from the terminal block.

Warning The illustration shows the DC power supply terminal block. Wire the DC power supply using the appropriate lugs at the wiring end, as illustrated. The proper wiring sequence is ground to ground, positive to positive (line to L), and negative to negative (neutral to N). Note that the ground wire should always be connected first and disconnected last.

Figure 6-2 Removing Nylon Cable Ties and Power Leads from a Cisco 7507 and Cisco 7507-MX DC-Input Power Supply

DO NOT SHIP WITH POWER SUPPLY

INSTALLED

OUT

INPUTFAIL

POWER

INPUT VOLTAGE : 40-72 V=

INPUT CURRENT : 24-13A

FASTENER TO BE FULLY ENGAGED BEFORE OPERATING POWER SUPPLY

Captive installation screw

Power leads attached to terminal block

( ) negative ( ) positive () ground

Nylon ties on cable and metal bracket

H2530

Step 5 Use a screwdriver to loosen and remove the captive installation screw on the top of the supply. See Figure 6-3.

Cisco 7500 Series Installation and Configuration Guide

6-4 OL-5008-03 B0