ADEMCO 676 Manuel utilisateur

No 6764JSTEN-IN MODULE

.677 MICROPHONE

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GENERAL INFORMATION:

The No. 676 Listen-in Module and No. 677 Microphone are designed to be used with a

digital communicator (such as the Nos. 669 or 670) at the pr.otected premises. They

permi’t the central monitoring station to ” I i sten-i n” to any sounds that might be

present in the protected area immediately following any message transmitted by the

digital communicator.

Up to 6 No. 677 Microphones may be connected to one No. 676 Listen-In Module and all

are powered from the same 6 V. DC source that supplies the digital communicator,(as

well as No. 659 Line Fault Monitor(s) and the No. 674 Select-A-Line, when used).

NOTE: The Nos. 676 and 677 cannot be used with the Nos. 612 or 662 Dialers.

OPERATION:

The No. 676

telephone I

municator’s

centra I mon

At the Protected Premises:

Listen-In Module’ is connected across the digital communicator’s incoming

ine and is activated whenever the communicator shuts down after the com-

successful transmission of a message and receipt of “kiss-off” by the

itori ng station.

The No. 676 keeps the telephone line in an off-hook.condition while audio from the

area(s) covered by the No. 677 Microphone(s) is sent over the telephone line to the

central monitoring station for approximately l-3/4 minutes (or 3-l/2 minutes if

selected during installation). At the end of that interval, the No. 676 shuts down

automatically and disconnects from the telephone line.

Should a second alarm be tripped at the premises whjle the No. 676 is “listening-in”,

the No. 676 will shut off and control of the telephone line will then return to the

comnun i cator.

At the Central Monitoring Station:

To “listen-in” on a telephone I ine over which a message is being received from an

installation using the No. 676, the operator at the central monitoring station must

pick up a standard telephone handset connected to that line while the No. 660

Digital Receiver is processing the call (as evidenced by the Receiver, or, if

installed, the No. 671 Digital Call Director or its Remote Indicator Unit), or

within 15 seconds after the receiver hangs up on that call.

When the No. 671 Digital Call Director is used at the central monitoring station,

the receiver wi I I be free to process new cal Is even w.hi le the previously “kissed-off”

call is being monitored.

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INSTALLATION:

No. 676 Listen-In Module:

For ease of ihstallation, the No. 676 Listen-In Module has a housing which permits

it to be conveniently mounted in the digital communicator (or other) cabinet. The

No. 676’s upper edge is provided with a lip that can be slipped over the upper edge

of the cabinet without interfering with the ability of the cabinet’s cover to close

and lock. See Diagram I.

No. 677 Microphone:

Up to 6 Microphones may be connected to the No. 676 Listen-In Module, with up to

750 feet (225 meters) of i nterconnecti ng cab le.

Actual iocation(s)for the microphone(s) in the protected premises will depend on

such considerations as normal background noise levels and room layout. In quiet

surroundings, each microphone may pick up sounds’originating more than 40 feet from

it. Automatic Gain Control (AGC) in the No. 676 Listen-In Module simultaneously

insures that faint sounds can be heard and that sudden loud nearby sounds will not

be unintelligible.

When locat i ng any microphone, however, the following precautions should be observed:

I . The mounting surface and area must be free from vibration and noise such as

caused by air conditioners, fans, etc.

2. Do not install directly adjacent to sources of high electrical noise such as

fluorescent lights.

WIRING:

See Diagram I.

Some leads of the No. 676 come already connected to its circuit board. Other leads,

with “quick disconnect” terminals, are packaged with the No. 676 for attaching to

connection posts on the unit in the field as required. Field wiring must be extended

from these leads as indicated. Wire nuts, solderless crimp Wire Splices (Ademco

No. 301) or solder and tape are recommended.

Proceed with wiring as follows:

I . No. 677 Microphone(s): No. 299 Cable should be used to connect the micro-

phone(s) to the No. 676 Listen-In Module. It is a shielded audio cable with

two conductors and a shield wire. Up to six microphones may be connected in

parallel from one to the next or individual cables may be connected from the

microphones to the No. 676, but NO MORE THAN 750 FEET (225 METERS) TOTAL

LENGTH OF CABLE SHOULD’BE USED.

a. At the No. 676, strip and remove the insulation and aluminum foil from

the end of the cable, exposing the RED and BLACK conductors and the bare

stranded SHIELD WIRE. Connect to the No. 676 as shown in the diagram,

noti ng that the RED lead shou Id be spl iced to the red “quick disconnect”

Iead provi ded.

b. At each No. 677 Microphone, simi larly strip the cable and connect as

shown in the diagram.

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2. Telephone Line Connections: Connect the No. 676’s ORANGE and GREEN leads

(provided with U-lugs) across the incoming telephone line terminals of the

digital communicator as shown.

3. Swi tched “Coup ler Power” Connect ion : Connect the No. 676’s VIOLET lead (with

quick disconnect terminal) to the digital communicator’s “Coupler Power” post

located at the upper left corner of the communicator’s circuit board. .

NOTE: If a No. 674 Select-A-Line is being used, the “Coup ler Power” post wi I I

a I ready be

i n use. This VIOLET lead should then be connected to the “Switched

(+I Power for Other Modules” post provided on the-No. 674 (see Installation

instructions for the No. 674).

4. Connections to No. 674 Select-A-Line (if used):

’

a. See Paragraph 3 above.

b. Connect a quick disconnect lead (provided) to the right hand post on the

No. 676 and extend it to the “Switched Listen-In (+I Power” post indicated

in the No. 674’s Installation Instructions.

5. Battery Connections: Connect the No. 676’s RED (+I and BROWN (-1 Leads (pro-

vided with U-lugs) to the same 6 V.DC source that powers the digital communicator.

ADJUSTMENT AND TEST:

Duration of “Listen-In” (AudioICal I:

When activated, the No. 676 sends audio over the telephone line for approximately

I-3/4.minutes. To double this time to approximately 3-l/2 minutes, CUT THE BLACK

JUMPER which protrudes from the back of the No. 676.

Audio Adjustments:

The following preliminary adjustments should be made at the protected premises with

the incoming telephone line disconnected from the digital communicator (terminals I

and 7 in the Nos. 669 or 670).

I. a. If a sing.le telephone line with local handsets is to be used with the digital

communicator, one of the local handsets may be used during the following steps,

provided the handsets are connected to the digital communicator (terminals 2

and 8 in the Nos.’ 669 or 670) in the usual manner.

b. If no local handsets are used, or, if the No. 674 Select-A-Line and two tele-

phone I i nes are to be used, the installer should provide his own handset and’

connect it across the incoming telephone line terminals of the digital communi-

cator (terminals I and 7 in the Nos. 669 or 6701.’

2. Connect Channel A of the communicator in the abort mode by positioning. its

(b Iack) abort jumper on the Abort Post.

3. Set the gain controls in the No. 676 and all No. 677’s to maximum (fully

clockwise).

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4. The setting-up procedure that follows will be greatly simplified if a portable

radio is used in the protected area to provide an audio signal.

5. Momentarily trip Channel A of the communicator and remove the alarm condition.

The No. 676 should turn on. Listen-in on the handset for the proper, desired

sound characteristics.

6. If necessary, adjust the gain control in the

position maximum AGC (Automatic Gain Control

soft sounds are accommodated) but there is s

fully counterclockwise position, AGC action

reduced but faint sounds are too).

No. 676. In the ful’ly clockwise

1 action is obtained (loud and

light audio distortion. In the

is minimized (background noise is

7. In multiple No. 677 Microphone installations, adjust the gain controls in the

microphones to equalize the sound contributions of each microphone as desired.

8. After camp leti ng the setting-up procedure, return Channel A of the communicator

to its original or desired condition, (“Abort” or “Non-Abort”) and reconnect

the communicator’s incoming telephone line.

9. A full system test should now be made in conjunction with the central monitor-

ing station, using the test channel of the communicator.

SPECIFICATIONS:

No. 676 Listen-In Module:

Physical: Width: 2 l/2” ( 6.4 cm)

Height: 6” (15.2 cm)

Depth: I l/2” ( 3.8 cm)

Weight: 9 oz. (255 grams 1

Electrical: Voltage: 6 V.DC (From Digital Communicator)

Standby Current: 0.010 ma

Operat i ng Current: 100 ma

Number of No. 677 Microphones Accommodated: Up to 6

Permissible No. 299 Cable Length: 750 ft. (225 meters) total

Duration of Audio Cal I : l-3/4 min. (black jumper not cut)

3-l/2 min. (black jumper cut)

No. 677 Microphone:

Physical: Width: 2- 17/64” (5.7 cm)

Height: 2-13/16” (7.1 cm)

Depth : I-9/32” (3.2 cm)

Weight: 2 oz. (57 grams)

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MOUNTING LIP (SEE DETAIL AT RIGHT)

COVER

No. 676

MOUNTING DETAIL

GAIN (AGC) CbNTROL- BLACK “CALL DURATION”

JUMPER AT REAR OF UNIT.

FOR 1% MINUTE CALL:

DO NOT CUT JUMPER

FOR 3% MINUTE CALL:

CUT JUMPER

COMMUNICATOR

(e.g.

No. 669,670)

TO “SWITCHED LISTEN-IN

(+) POWER” POST OF No. 674

SELECT-A-LINE (IF USED).

SPARE POST

FOR ‘COUPLER

POWER” TO

OTHER

MODULES

(IF NEEDED)

ARE (SHIELD) WIRE

I-------d TO (+) BATTERY

COMMUNICATOR

TO (-) BATTERY No. 299 CABLE

TO “COUPLER POWER” POST OF

DIGITAL COMMUNICATOR (e.g. No.

a 669, 670) m “SWITCHED (+)

POWER FOR OTHER MODULES”

POSTOF. tie. 674 SELECT-A-LINE

(IF USED) No. 677

*ADDITIONAL No. 299 GABLE(S)

MAY BE RUN TO OTHER

No. 677 MICROPHONES, IF REQ’D.

aIMITS: 6 MICROPHONES,

750’ (225 METERS) CABLQ Diagram

1: Installation and Wiring

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USING NOS.676/677 WITH NO.612TAPE DIALER

The 676/677 Listen-l n Module can be used to obtain ” 1i s-ten-1 nrl

after the last call on a 612 dialer. To accomplish this, program

the tape so that there is no hang-up after the last message on that

channel .

Since listen-in starts when the dialer stops, the last message

should be as close to the end of the tape as is possible. This will

cut down the amount of time between the end of the message and the

beginning of the listen-in.

Connect the VIOLET wire of the 676 module to the coupler power (+I

terminal of the No. 612 (terminal 8 on the older model, terminal 7

on newer models). This connection causes the No. 676 to go on when

the No. 612 goes off.

The orange and green wires of the 676 get connected to the incoming

phone I ine. If a line seizure module is not being used, orange and

green can simply be connected to terminals 8 and 10 of the 612 dialer

If a line seizure module is used, connect orange and green to the

phone line input of the line seizure module.

6 V. DC required to power the 676/677, this power can be obtained

from the battery or recharge-a-pack which powers the dialer.

(676) ll4& ‘.

I’I’

adad

a 0

l l

&& ‘ORANGEa 0

l l

&& ‘ORANGE

** GREENGREEN

II C-C-

I ZURE 1

i I

TO PHONE

LINES

(612)

+(+I+-g

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