ADEMCO 676 User manual

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
l 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
fl
No. 676
I
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
lk
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-
II
II
I ZURE 1
I i I
TO PHONE
LINES
(612)
+(+I+-g
10
1
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