User's Manual

ADCP-75-130 • Issue 3C • August 2006

Page 29

The following materials are required in order to complete the procedures in this section:

• Wall-mount fasteners (wall-mount applications only)

• #22 AWG (0.40 mm) category 3 or 5 cable (for power cable and external alarm connections)

• RJ-45 male connectors (for power cable)

• #18 AWG (1.00 mm) insulated stranded copper wire (for chassis grounding wire)

• Ring terminal for #18 wire (for chassis ground wire connection)

• 50 or 62.5 micron core multi-mode or 9 micron core single-mode fiber optic cable

• LC-type field installable connectors

• High performance, flexible, low loss 50-ohm coaxial cable

• N-type male connectors

• Wire ties

4.3 Unpacking and Inspection

This subsection provides instructions for opening the shipping boxes, verifying that all parts

have been received, and verifying that no shipping damage has occurred. Use the following

procedure to unpack and inspect the DHU:

1. Open the shipping carton and carefully unpack the DHU from the protective packing

material.

2. Check the DHU for broken or missing parts. If there are any damages, contact ADC (see

Section 6 at the end of this manual) for an RMA (Return Material Authorization) and to

reorder if replacement is required.

4.4 Mounting Procedure

The DHU may be either rack-mounted or wall-mounted. Of the procedures that follow, use

whichever procedure is appropriate for the installation:

Note: To insure that all optical connectors and transceivers remain dust-free during

installation, leave all dust caps and dust protectors in place until directed to remove

them for connection.

4.4.1 Rack Mount Installation

The DHU may be mounted in either a 19-inch or 23-inch EIA or WECO equipment rack. Both US

standard and metric machine screws are included for rack mounting the DHU. When loading the

DHU in a rack, make sure the mechanical loading of the rack is even to avoid a hazardous

condition such as a severely unbalanced rack. The rack should safely support the combined weight

of all the equipment it holds and be securely anchored. In addition, the maximum recommended

ambient temperature for the DHU is 50º C (122º F). Allow sufficient air circulation or space

between units when the DHU is installed in a multi-unit rack assembly because the operating

ambient temperature of the rack environment might be greater than room ambient.