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Note Refer to the Catalyst 8540 CSR Route Processor and Interface Module Installation Guide for detailed information about the maintenance of the Catalyst 8540 CSR route processors and interface modules. Refer to the Processor Installation Guide and the ATM Port Adapter and Interface Module Installation Guide for detailed information about the maintenance of the Catalyst 8540 MSR route processors, port adapters, and interface modules. |
A 20A modular power cord connects each AC power supply to a separate site power source. Many telcos require the DC power supply because these installations are powered by -48 or -60 VDC batteries. From an operational perspective, the DC-input power supply has the same characteristics as the AC-input version.
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Note Installation is approved for use with copper connectors only. Make the attachment of the chassis ground M4 pemnuts directly to the central office or other interior ground system with a number 6 AWG copper ground connector as a minimum. The chassis employs two threaded M4x7 chassis ground M4 pemnuts. These pemnuts are located on the front of the chassis. The grounded chassis M4 pemnuts require M4 bolts and locking hardware, which are not included. |
To replace a power supply, you need the following tools:
To remove an AC power supply, follow these steps:
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Caution Failure to turn off the AC power supply could result in equipment damage. |
Step 2 Disconnect the AC power cord from the input line.
Step 3 Remove the input power cord from the power cord connection.
Step 4 Loosen the captive installation screw on the power supply with a screwdriver. (See Figure 3-1 .)
Step 5 Grasp the power supply handle with one hand. Slowly pull the power supply out of the chassis toward you. While holding the power supply handle with one hand, place your other hand underneath to support the bottom of the supply. (See Figure 3-2 .)
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Warning Keep hands and fingers out of the power supply bays. High voltage is present on the power backplane when the system is running. |
Step 6 Pull the power supply out of the bay and put it aside.
Step 7 Install a power supply cover plate over the power supply bay opening and secure it with the mounting screws if the power supply bay is to remain empty.
To install the AC power supply, see the "Installing Power Supplies" section.
To remove a DC power supply, follow these steps:
Step 2 Turn off the power switch on the power supply you are removing. (See Figure 3-3 .)
Step 3 Remove the terminal block cover by removing the two screws at the top and bottom of the terminal block. (See Figure 3-3 .)
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Warning When installing the unit, the ground connection must always be made first and disconnected last. |
Step 4 Disconnect the input wires from the terminal block.
Step 5 Loosen the captive screw on the power supply with a screwdriver.
Step 6 Grasp the power supply handle with one hand. Slowly pull the power supply out of the chassis toward you. While holding the power supply handle with one hand, place your other hand underneath to support the bottom of the supply. (See Figure 3-2 .)
Step 7 Install a power supply cover plate over the opening and secure it with the mounting screws if the power supply bay is to remain empty. This protects the inner chassis from dust and prevents accidental contact with live voltage at the rear of the bay.
To install the DC power supply, see the "Installing Power Supplies" section.
This section describes how to replace the fan assembly, which is a single unit that draws in cooling air and distributes it across the route processor, switch modules, and interface modules. The absence of cooling air can cause the interior of the chassis to heat up and can cause an overtemperature condition. Never operate the system if the fan assembly is not functioning properly.
The fan assembly is located on the left side of the chassis module cage. (See Figure 3-4 .) The two captive installation screws secure the fan assembly to the back panel.
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Caution If you are replacing the fan assembly while the unit is operating, make sure the replacement fan assembly is ready for immediate installation. |
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Caution Never operate the system if the fan assembly is not functioning properly. An overtemperature condition can result in severe equipment damage. |
You need a 3/16-inch flat-blade screwdriver to remove the fan assembly.
To remove the existing chassis fan assembly, follow these steps:
Step 2 Use a flat-blade screwdriver to loosen each of the two captive installation screws by turning them counterclockwise. Do not attempt to completely remove them.
Step 3 Grasp the fan assembly with both hands and pull it toward you and away from the backplane using steady pressure until it frees the backplane.
Step 4 Lift the fan assembly out of the chassis and put it in a safe place.
Proceed to the following section to reinstall a fan assembly immediately if the power has not been turned off.
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Caution Never operate the system if the fan assembly is not functioning properly or if a fan assembly is not quickly reinstalled. An overtemperature condition can result in severe equipment damage. |
To install a fan assembly, follow these steps:
Step 2 Place the fan assembly into the front chassis cavity so it rests on the chassis, and then lift the fan assembly up slightly and align the top and bottom guides.
Step 3 Push the fan assembly into the chassis until the captive installation screws meet the chassis.
Step 4 Tighten each of the two captive installation screws.
Step 5 Verify fan assembly operation by checking the fan assembly LED. (See Figure 3-5.) The Fan LED turns green when operating properly.
Posted: Thu Sep 21 13:34:16 PDT 2000
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