Cisco Systems MAS-7K, MAS-7507, CHAS-7507, CHAS-7K manual Cisco 7507 System Backplane Slot Key Guides

Product Overview

Figure 5 Cisco 7507 System Backplane Slot Key Guides

Key guides on interface processors and RSP2

Top

RSP2

Interface processor slots

Top

key guide

Rear of processor card

Bottom

RSP2

Bottom

Interface processorkey guide slots

H3126

Spring-loaded ejector levers help to ensure that the processor modules are either fully inserted in the backplane or fully dislodged from it. It is particularly important to use the ejector levers when removing or installing processor modules because the bus connectors on the boards must be either fully inserted in the backplane or fully dislodged from it when the system is operating. Any processor module that is only partially connected to the backplane can hang the bus.

Captive installation screws at the top and bottom of each processor module faceplate, when tightened, provide EMI shielding and also help ensure proper seating in the backplane. (See Figure 8.) After using the ejector levers to install a processor module, tighten the top and bottom captive installation screws to prevent the module from becoming partially dislodged from the backplane. These screws must be tightened to meet EMI specifications.

For complete descriptions of all system components, refer to the Cisco 7000 Hardware Installation and Maintenance or Cisco 7507 Hardware Installation and Maintenance publications.

Figure 8 on page 19 shows a detail of the bottom ejector lever function. When you push the bottom ejector lever upward, and push the corresponding top ejector lever downward, the ejector levers push the board connectors into the backplane at the rear of the slot inside the chassis. Push the bottom ejector lever a full 90 degrees upward, and push the upper ejector lever 90 degrees downward, to ensure that the board connectors are fully seated in the backplane.

Caution The ejector levers ensure that the backplane connectors on the card are fully seated in, or fully ejected from, the backplane. Failure to use the ejector levers could result in a partial backplane connection, which can hang the system.

Cisco 7000 and Cisco 7507 Chassis Replacement Instructions 5