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3-17
Cisco Catalyst 4900M Switch Installation Guid e
78-18350-02
Chapter 3 Installing the Switch
Configurable Modules
Wa r ni n g
Blank faceplates and cover panels serve three important functions: they prevent exposure to
hazardous voltag es and currents inside the chass is; the y contain e lectromagne tic int erference (EMI)
that might disrupt oth er equipment; and th ey direct the flo w of cooling air throug h the chassis. Do no t
operate the system unless all cards, faceplates, front covers, and rear covers are in place.
Statement
10 29
Installing Switching Modules
Wa r ni n g
Invisible laser radiation may be emitted from disconnected fibers or connectors. Do not stare into
beams or view directly with optical instruments.
Statement 1051
Wa r ni n g
Voltages that present a shock hazard may exist on Power over Ethernet (PoE) circuits if
interconnections are made using uninsulated exposed metal contacts, conductors, or terminals.
Avoid using such interconnection methods, unless the exposed metal parts are located within a
restr icted access location and user s and service peopl e who a re authorized within the res tricted
access loc ation are made aware of the hazard. A restricted access ar ea can be ac cessed only thr ough
the use of a special tool, lock and key or other means of security.
Statement 1072
Caution To prevent ESD damage, handle switching modules by the carrier edges only.
To install a switching module in a Catalyst 4900M series switch, perform the following steps:
Step 1 Take the necessary precautions to prevent ESD damage as described in Appendix B and in Chapter 2.
Step 2 Choose a slot for the new switching module. Ensure that you have enough clearance to accommodate
any interface equipment that you will connect directly to the switching module ports.
Step 3 Loosen the captive installation screws that secure the switching-module filler plate (or the existing
switching module) to the desired slot.
Step 4 Remove the switching-module filler plate (or the existing switching module). Save the switching-module
filler plate for future use. If you are removing an existing switching module, see the “Removing
Switching Modules” section on page 3-15.
Step 5 To install the new switching module, grasp the switching-module front panel with one hand, and place
your other hand under the carrier to support the switching module, as shown in Figure 3-11. Do not touch
the printed circuit boards or connector pin s.
Step 6 Align the edges of the circuit board with the slot guides on the sides of the switch chassis, as shown in
Figure 3-11.

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