AT&T 555-230-894 manual Wall-Mounting Plates

Install the 1145B1 Power Supply

32.The 1145B1 (not 1145A1) is required for installation outside the United States.

Auxiliary power (local or bulk) is always required in the following situations:

■Attendant console 302B.

■Any 8520 terminal.

■Any 7500-series or 8500-series terminal with an asynchronous data module.

■Any 7500-series terminal (whether in passive bus, or point to point, that is, one per basic rate interface port).

■Any 8510 terminal in passive bus or with an asynchronous data module. (Provide auxiliary power to an 8510 unless you are certain it will never be used to support such applications as data or video.)

This section tells how to install the 1145B1 Power Supply, 1146B1 Power Distribution Unit, and 2.5 amp hour (AH) back-up batteries. All units are mounted on wall-mounting plates. The wall-mounting plates should be installed first. The rest of the hardware can be mounted in any desired order. The next illustration shows how the power supply and wall-mounting plates fit together.

Wall-Mounting Plates

Two wall mounting plates are provided for easy assembly and to provide correct spacing between units for cooling. The top plate is needed for mounting the back-up battery. The bottom plate is needed to mount the Power Supply and Distribution Units. The plates can also be used for rack mounting the hardware by means of standard rack-mounting brackets.

1.Locate one plate directly below the other one such that the AC power cord (6-1/2 feet or 2 meters) reaches the desired electrical outlet from a power supply mounted on the bottom plate. Both plates should be located so the raised letters are right side up.

NOTE:

A maximum of four Power Supplies can be powered from one dedicated 110VAC, 20 amp (or 230VAC, 15A) feeder. Use only unswitched receptacles. In other words, receptacles not connected to a wall switch.

2.Secure the wall mounting plates to a standard 3/4 inch (2 cm) thick plywood mounting board. Each mounting plate comes with four #10x1/2-inch wood screws.

Issue 1 September 1995 9-27