Installing the Control Unit

Step 3: lnstalling a Copper Shield

Each expansion carrier requires a power supply.

The added power supply can cause excessive noise in the module occupying the next slot. To eliminate this noise, install a copper foil shield to the power supply as indicated in this procedure. These shields and their labels are packaged in the power unit shielding kit included with the expansion carrier.

See Figure 2-11.

Upper Copper

Foil Shield

Lower Copper

Foil Shield

Power Unit

Information

Label

UL Label

or

CSA Label

Figure 2-11. Installing a Copper Shield in the Power Supply

Installing the Power Supply 2-37

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AT&T Release 2.0 manual Lnstalling a Copper Shield, Installing a Copper Shield in the Power Supply