User Manual

ManualsBrandsADC Telecommunications ManualsElectronicsDigivance 1900 MHz Indoor Coverage Solution

ADCP-75-110 • Issue 2B • July 2001

Page 37

©

2001,

ADC

Telecommunications,

Inc.

6.

Place

the

DC

power

cable

within

the

cable

guides

provided

(see

Figure

21)

and

then

dress

and

secure

the

cable

at

the

DHU

per

standard

industry

practice.

7.

Connect

the

DC

power

cable

to

the

DRU

as

specified

in

the

instructions

provided

with

that

unit.

8.

Repeat

steps

1–7

for

each

remaining

DRU

that

will

be

powered

by

the

DHU.

3.10 Extermal Alarm System Connections

The

alarm

interface

between

the

DHU

and

an

external

alarm

system

is

supported

by

a

six-

terminal

plug

(with

screw-type

terminals)

that

connects

to

a

receptacle

mounted

on

the

DHU

front

panel.

The

terminal

plug

provides

connections

to

normally

open

(NO)

and

normally

closed

(NC)

dry

type

alarm

contacts

for

both

minor

and

major

alarms.

A

category

3

or

5

cable

is

typically

used

to

connect

the

DHU

to

the

external

alarm

system.

Use

the

following

procedure

to

install

the

alarm

wiring

and

connect

it

to

the

DHU:

1.

Obtain

the

required

length

of

category

3

or

5

cable.

2.

Route

the

cable

between

the

DHU

and

the

external

alarm

system

(if

not

already

routed)

and

then

cut

to

required

length.

Allow

sufficient

slack

for

dressing

and

organizing

the

cable

at

the

DHU.

3.

Strip

back

the

outer

cable

sheath

and

insulation

to

expose

the

wires

at

both

ends

of

the

cable

and

strip

back

0.2

inches

(5

mm)

of

insulation

each

wire.

4.

Connect

the

Major

alarm

wire

pair

to

the

MAJOR

COM/NC

or

MAJOR

COM/NO

terminals

(whichever

is

required

by

the

external

alarm

system)

on

the

DHU

alarm

terminal

connector

(supplied

with

DHU)

as

shown

in

Figure

22.

16370-A

ALARM

CONNECTOR

MAJOR

ALARM

WIRES

MINOR

ALARM

WIRES

ALARM CONNECTOR

DETAIL

Figure 22. External Alarm System Connections