Cisco Systems 7500 Series manual Captive installation screw

Chapter 3 Installing a Cisco 7500 Series Router

Installing the Cisco 7507 and Cisco 7507-MX

R E V I E W D R A F T — C I S CO CO N F I D E N T I A L

Note The following procedure applies to AC-input and DC-input power supplies, with specific differences clearly noted. To prevent system problems, do not mix AC-input and DC-input power supplies in the same chassis.

Warning This product relies on the building’s installation for short-circuit (overcurrent) protection. Ensure that a fuse or circuit breaker no larger than 120 VAC, 15A United States (240 VAC, 10A international) is used on the phase conductors (all current-carrying conductors).

Always install the first power supply in the lower power supply bay and the second, if any, in the upper bay. In systems with dual power supplies and when separate power sources are available, connect each power supply to separate input lines, so in case of an input line failure, the second source will most likely still be available.

If you install a second power supply in the upper bay, use a screwdriver to loosen the captive screw and remove the cover plate. Save the plate and replace it whenever the system is operating with one power supply.

Warning Before working on a chassis or working near power supplies, unplug the power cord on AC units or disconnect the power at the circuit breaker on DC units.

Following is the procedure for installing power supplies in the Cisco 7507 or Cisco 7507-MX:

Step 1 If possible, turn off the circuit breaker to which you will connect power and tape the breaker switch in the off position.

Step 2 Check the switch on the face of the power supply, and place it in the off (O) position. The interlock tab should not extend out of the unit.

Step 3 Hold the power supply by the handle and place your other hand underneath to support the bottom.

Figure 3-9 Handling a Power Supply (Cisco 7507 and Cisco 7507-MX AC-Input Power Supply Shown)

Captive installation screw

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	Cisco 7500 Series Installation and Configuration Guide
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