ADTRAN 1500 Spezifikationen PDF herunterladen (Seite 4)

4 61180001L1-5BSection 61180001L1-5, Issue 2

1. Flush-mount: For flush-mount systems, the Total

Access 1500 shelf must be mounted from the rear

of the rack, with mounting bracket flanges facing

rearward.

2. Mid-mount: For mid-mount systems, the Total

Access 1500 shelf must be mounted from the

front of the rack, with the mounting bracket

flanges facing forward.

NOTE

Other orientations will require either mounting

from the front or rear, and depend on the rack

type installed in the CO and the standard operating

procedures established by your CO.

Once the orientation of the shelf has been determined,

use the four appropriate screws for your CO rack and

an appropriate screwdriver and secure the Total

Access 1500 shelves in place on the rack.

Power Connections

Interconnections between the common card modules

and channel units are accomplished through the

backplane PCB. All external connections to the Total

Access 1500 are through connectors and wire-wrap

headers located on the backplane.

NOTE

When connecting power and ground wiring, be

sure to follow all local, national, and company

codes.

All permanent connections to the Total Access 1500

are made on the backplane. Figure 2 shows the

location of the power and ground connections, and

Figure 3 shows the backplane and pin-outs.

Frame Ground Connection

The frame ground terminal, located on the upper right

corner of the backplane (see Figure 3), should be

connected using appropriately sized wire. Use a wire

gauge that is at least the same gauge as the power

wiring. To make the frame ground connection to the

Total Access 1500:

1. Using the crimping tool, connect an appropriate

lug to each end of the appropriately sized wire.

2. Connect the ground wire from Total Access 1500

Frame ground terminal to the Equipment Rack

grounding screw.

3. Tighten the ground connection securely with a

straight-slot screwdriver.

Test Frame Ground Connection

To ensure a good ground, use a multimeter to check

continuity between the frame grounding lug and the

rack grounding strap at the top of the rack. Using a

voltmeter set to its lowest resistance range, if

applicable, place one lead on the rack’s ground strap

and the other lead on the Total Access 1500 frame

ground terminal. The reading should be 1 or 2 ohms.

Greater readings should be investigated.

Power Connection

NOTE

Connect to a reliably grounded -48 Vdc source,

which is electrically isolated from the AC source.

NOTE

A readily accessible disconnect device, such as a

rack mount fuse and alarm panel that is suitably

approved and rated, should be incorporated in the

fixed wiring.

Power connections use a block, labeled TB1, located

on the upper right side of the backplane (see Figure 2).

The terminals are on .375 inch centers and allow for

wire gauges up to 12 AWG. There is a separate Frame

Ground/External Ring Generator terminal, labeled

TB2, located on the bottom right side of the backplane,

and can accommodate up to 14 AWG wire. The Frame

Ground terminal routes to mechanical contact points

and provides an electrical connection to the chassis

metalwork.

Figure 2. Power and Ground Connectors

TB1

Pin Number Description

1 -48V IN PRI

2 -48V RTN PRI

3 -48V IN SEC

4 -48V RTN SEC

5 Frame Ground

TB1

RTN

Frame

Ground

-48 PRI

-48 SEC

1 2 3 4 5 6 7 8 9 10 11 12

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