AT&T 518-600-016 manual Installing the Power Supply Module

INSTALLING THE POWER SUPPLY MODULE

WARNING: Do not attach any cables or power cords to the Power Supply Module until it is installed in the carrier. If a Power Supply Module requires a Frequency Generator, it must be installed before the Power Supply Module is installed in the carrier.

Install a Power Supply Module in the leftmost slot of the basic and expansion carriers.

If the carrier will have a Basic Telephone Module, a Frequency Generator must be installed on the Power Supply Module prior to installation. The Power Supply Module containing the Frequency Generator must be installed on the same carrier as any Basic Telephone Modules. Refer to the procedure, "Installing a Frequency Generator in the Power Supply Module" on page 2-67.

If you need to add an expansion carrier to the control unit, the power supply that you add to that carrier may cause excessive noise on certain line or station modules that you place next to it. In order to eliminate the noise, you need to apply a shield to the Power Supply Module. See “Adding a Shield to a Power Supply Module” on

page 2-70.

WARNING: Do not apply power to the control unit until. all the modules are installed and you have become familiar with the power up sequence. Failure to comply may result in shock hazard or damage to equipment.

Follow these steps to install the Power Supply Module.

1 Make sure aIl power is removed from the control unit.

2 Set the power switch on the Power Supply Module to Off.

3 Install the Power Supply Module in the leftmost slot of the carrier.

2-66 Installing the Control Unit