Louroe Electronics DG-12II User Manual

DG-12II and DG-MA

®

6955 VALJEAN AVE, VAN NUYS, CA 91406

PH: [phone] / FAX: [phone]

/ [e-mail]

MODEL DG-12II

SOUND ACTIVATED BASE STATION

INSTALLATION AND OPERATING INSTRUCTIONS

COMPANION DG-MA

Monitor/Talkback amplifier
provides:

6 Two-way listen/talkback

between base station
& remote units

6 “All-Call” for addressing all

zones simultaneously
(12 zones maximum)

6 Input/output to DVR/VCR for

audio recording & playback

FOR ONE-WAY LISTEN

WIRING REQUIREMENTS

2 Conductor shielded cable, 22
gauge with a 24 gauge drain wire

NOTE: Unshielded cable is not

satisfactory for audio systems

West Penn 452 or equivalent

MODEL DG-MA

FOR TWO-WAY TALK/LISTEN

WIRING REQUIREMENTS

4 Conductor consisting of:

+

2 Conductor shielded, 20 gauge
with 22 gauge drain (microphone
connection)

+

2 Conductor unshielded, 18 gauge

(speaker connection)

All in the same jacket

West Penn 356 or equivalent

®

DG_12II_6/11

INSTALLATION AND OPERATING INSTRUCTIONS

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DG_12II_6/11

INSTALLATION AND OPERATING INSTRUCTIONS

TABLE OF CONTENTS:

Page 1 DG-12II QUICK REFERENCE

Page 1 DG-12II APPLICATION

Page 2 DESCRIPTION OF PARTS (FRONT PANEL LAYOUT)

Page 5 DG-12II REAR PANEL LAYOUT

Page 6 DG-MA DESCRIPTION (FRONT PANEL LAYOUT)

Page 7 DG-MA REAR PANEL LAYOUT

Page 8 OPERATIONS

Page 9 INSTALLATION

Page 10 MICROPHONE CONNECTIONS (CONNECTIONS TO MODEL TLI)

Page 11 CONNECTION TO TLMC

Page 12 CONNECTIONS TO PLUG-IN CONNECTOR (AUDIO AND RELAY)

Page 13 DG-12II AND DG-MA CONNECTIONS

Page 14 CONNECTION TO EXTERNAL RECORDER

Page 15 CONNECTING MLA-6 MIXER TO DG-12II AND REMOTE MICROPHONE

Page 17 POWER CONNECTIONS

Page 18 PARALLELING TWO DG-12II

Page 19 CONNNECTING AN EXTERNAL AMPLIFIER

Page 20 OPERATION AND TEST

Page 24 TROUBLE SHOOTING

Page 25 SUMMARY AND SPECIFICATIONS

Page 25 Dg12II MODULE ALARM FREQUENCY RESPONSE

Page 26 GLOSSARY

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DG_12II_6/11

INSTALLATION AND OPERATING INSTRUCTIONS

QUICK REFERENCE:

Wiring Requirements:

If using microphones for one-way / listen-only:

2 Conductor shielded cable, 22-gauge with a 24-gauge drain wire.

West Penn 452 or equivalent

If using speaker/microphones for two-way listen/talkback:

4 Conductor (all within the same jacket):

Microphone Connection: 2 Conductor shielded, 20-gauge with a

Speaker Connection: 2 Conductor unshielded, 18-gauge

West Penn 356 or equivalent

NOTE: Unshielded cable is not recommended for

microphone connections.

22-gauge drain wire.

APPLICATION:

The DG-12II “Duress Guard” audio alarm Base Station is a sound activated
12 zone audio surveillance system, which provides audio and visual alarms
when sound levels exceed the preset threshold, time duration and
frequency band in a given zone.

It is designed for life and property protection by monitoring areas of
possible crime or violence. When coupled to the DG-MA Monitor/Talkback
Amplifier, the operator may speak and listen to any or all surveillance
zones, as selected on the front panel. An audio mixer such as Louroe's
MLA-6 may be used to expand the area of coverage per zone. Up to 6
microphones per zone may be used.

Provisions for audio output to a recorder and alarm relay closures for other
equipment are available at the DG-12II rear panel. A tester for alarm delay
and audio is built into the DG-12II. The DG-12II will work with all Louroe

microphones and speakers. Two-way talk/listen is accomplished with the
addition of a DG-MA Monitor/Talkback Amplifier.

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PAGE 1 of 28

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DG_12II_6/11

DESCRIPTION:

INSTALLATION AND OPERATING INSTRUCTIONS

1

2

ZONES

MONITOR

TALKBACK

The DG-12 Audio Alarm Base Station is of panel construction and mounts in a standard 19”

II

equipment rack. All controls and indicators are mounted on the front panel and all electrical
connections are made at the rear of the unit. DC power is supplied to the DG-12II by an
external power supply unit (included), which connects to 120 VAC.

OFF

ALARM LEVEL

ON

ON/AUDIO ALERT

DG-12II

ALARM DELAY

OUROE

L

LECTRO NICS

E

ALARM INPUT

TIME

DELAY

THRESHOLD
SENSITIVITY

ALARM DELAY INPUT TIME RESETTRIGGER POWER

SET-UP CONTROLS

SENSITIVITY RESET

NON-ALARM

MONITOR

AUTO-RESET

3

4

POWER

5

7

6

Fig. 1 DG-12 Front Panel LayoutII

[1] Zone Selector Switch Selects monitor or talkback operation for that zone. Zone numbers

are located directly above the switches (zones 1-12).

[2] Alarm Indicator LED Lights red when the unit goes into alarm. Stays red until the reset

button is pressed. Lights green (flickers) when audio is detected.

[3] Power Indicator LED Lights when power is applied to the unit.

[4] Sonalert Buzzer Gives a 3 second pulsating audible sound whenever the unit goes

into alarm. Located on side of chassis. May be turned OFF using
the Keyswitch[16].

[5] Time Delay Switch Selects to increase or decrease the length of alarm delay.

Switch operations:
a). UP position- increases the length of alarm delay
b). DOWN position- decreases the length of alarm delay.

[6] Audio Alarm Input Jack Used for testing the level of audio coming into the unit as seen from

the Audio Level Indicator[17].

[7] Threshold Sensitivity Switch Selects to increase or decrease the audio threshold sensitivity

settings. Used in conjunction with the Day/Night Sensitivity

Switch[9], Night Sensitivity Setting Pushbutton[20] and Day
Sensitivity Setting Pushbutton[21] (see next page).

Switch operations:
a). UP position- increases the sensitivity of audio threshold settings
b). DOWN position- decreases the sensitivity of audio threshold

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PAGE 2 of 28

DG_12II_6/11

INSTALLATION AND OPERATING INSTRUCTIONS

ZONES

MONITOR

TALKBACK

OFF

ALARM LEVEL

ON

ON/AUDIO ALERT

DG-12II

ALARM DELAY

OUROE

L

E

ALARM INPUT

TIME

DELAY

LECTR ONIC S

THRESHOLD
SENSITIVITY

SET-UP CONTROLS

ALARM DELAY INPUT TIME RESETTRIGGER POWER

8 91110

SENSITIVITY RESET

13

12

14

NON-ALARM

MONITOR

AUTO-RESET

15

Fig. 1 DG-12 Front Panel LayoutII

settings.

[8] Alarm Delay Input Jack Used for testing the length of alarm delay settings as shown by the

Alarm Delay Indicator[18].

POWER

[9] Day/Night Sensitivity Switch Selects day or night sensitivity.

Switch operations:
a). UP position- selects night sensitivity. Used in conjunction with the
Night Sensitivity Setting Pushbutton[20].
b). DOWN position- selects day sensitivity setting. Used in
conjunction with the Day Sensitivity Setting Pushbutton[21].

[10] Tester Trigger Pushbutton Used to initiate a test alarm to set and determine the length of the

alarm time delay setting as shown by the Alarm Delay Indicator[18].

[11] Tester Reset Pushbutton Resets Alarm Delay Indicator[18].

[12] Reset Switch Resets all zone alarms simultaneously.

[13] Tester Power Switch Turns ON power to the tester section of the unit.

[14] Non-Alarm Monitor Switch Used to listen or monitor any or all the zones even when no alarm

has occurred. Audio from any or all zones that have been switched to
“monitor” (Zone Selector Swtches[1] in UP position) can be
monitored at the Monitor Speaker[36] located in the DG-MA unit.

[15] Auto-Reset Knob Cancels the alarm after a set period of time and returns the unit in

standby mode. Time can be set from 3 seconds to 3 minutes. Turn
knob clockwise to ON position. Continue rotating to desired time
setting.

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PAGE 3 of 28

DG_12II_6/11

INSTALLATION AND OPERATING INSTRUCTIONS

ZONES

MONITOR

TALKBACK

NON-ALARM

MONITOR

AUTO-RESET

OUROE

L

E

ALARM INPUT

TIME

DELAY

LECTRO NICS

THRESHOLD
SENSITIVITY

ALARM DELAY INPUT TIME RESETTRIGGER POWER

SENSITIVITY RESET

SET-UP CONTROLS

16

Fig. 1 DG-12 Front Panel LayoutII

[16] Keyswitch Turns ON power to the unit. Also

Turns ON the Sonalert Buzzer [4].

Switch operations:

Position 1- Power OFF
Position 2- Power ON
Position 3-Power and Sonalert Buzzer ON

OFF

ALARM LEVEL

ON

ON/AUDIO ALERT

17

POWER

DG-12II

ALARM DELAY

18

19

20

21

22

23

[17] Audio Level Indicator Shows the level of the audio of the zone in test, It contains 10 level

segments (7 green and 3 red) that illuminate and move up and down
the scale, depending upon the amount of signal it receives. Settings
should be made so that the level of the ambient sound on test does
not reach the red segments. The unit will go into alarm when the
audio reaches the last red segment.

[18] Alarm Delay Indicator Indicates the length of the alarm delay setting.

[19] Alarm Delay Setting Pushbutton Used to set the length of alarm delay. The switch can be pushed to

a maximum of 32 times. It must be pushed and released quickly.
The switch will go to the next step or more if not released
immediately.

[20] Night Sensitivity Setting Pushbutton Used to set the audio threshold sensitivity for nighttime. The

Day/Night Sensitivity Switch [9] must be in the UP position. The
switch can be pushed to a maximum of 32 times. Additional pushes
have no effect on the switch.

[21] Day Sensitivity Setting Pushbutton Used to set the audio threshold sensitivity for daytime. The

Day/Night Sensitivity Switch [9] must be in the Down position.
The switch can be pushed to a maximum of 32 times.

[22] Audio Alarm Output Jack Provides DC output corresponding to the audio alarm level after the

filter network. Used to set and test the level of audio as seen at the
Audio Level Indicator [17]. A test cable is provided to connect
between this jack and Audio Input Jack[6].

[23] Alarm Delay Output Jack Provides output to the Alarm Delay Input Jack[8]. Used to set the

time delay feature and for checking the time delay setting, which is
variable between 0.1-3.2 seconds.

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DG_12II_6/11

INSTALLATION AND OPERATING INSTRUCTIONS

25

24

ZONE 11

ZONE 12 ZONE 10 ZONE 8 ZONE 6 ZONE 4 ZONE 2

27

JP51

GND

1 2 3 4 5

AUDIO OUT

TO RESET

PUSH IN

&

RELEASE

26

ZONE 1ZONE 3ZONE 5ZONE 7ZONE 9

TB GND

ALL CALL CTRL

TB AUDIO

TB RETURN

15VDC. 8A

+15VDC GND

29

28

Fig. 2 DG-12 Back Panel LayoutII

[24] Mic/Talkback 5-Pin Header Connects to remote station (microphones, audio mixer & speakers)

for each zone.

[25] Relay Output 3-Pin Header Relay output (COM, NC, and NO). Common (COM) and Normally

Open (NO) closes whenever that zone goes into alarm.

[26] Talkback Control 5-Pin Header Connects to the DG-MA for talkback operation.

[27] Power Breaker 6.3A, 28Vdc power circuit breaker.

[28] Audio Out Jack Connects to DG-MA for listening to monitored audio.

[29] Power Header Accepts 15Vdc from power supply (included).

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DG_12II_6/11

DG-MA

DESCRIPTION:

The DG-MA Monitor/ Talkback Amplifier is of panel construction and mounts in a
standard 19” equipment rack.

INSTALLATION AND OPERATING INSTRUCTIONS

37

MIC

TALKBACK

LEVEL

TALKBACK
INDICATOR

ALL

CALL

MONITOR

LEVEL

HEADPHONES

POWER

DG-MA

30 31 32 33 34

35

36

Fig. 3 DG-MA Front Panel Layout

[30] AUX. MIC Jack Accepts ¼ “ plug from a handheld microphone used for talkback.

[31] Talkback Level Control Used to adjust the level of talkback audio transmitted to the

remote speakers.

[32] Talkback Indicator LED Illuminates whenever the talkback switch is pressed.

[33] All Call Pushbutton Switch Used to talk to all audio zones at once.

[34] Monitor Level Control Used to adjust the level of monitored audio.

[35] Headphone Jack Used for private listening. Any monaural headphone with an

impedance of 8 to 600W may be used.

[36] Monitor Speaker Audio from any selected zone is produced through the speaker.

[37] Power LED Indicates power is present at the unit.

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DG_12II_6/11

INPUT

AUDIO

INSTALLATION AND OPERATING INSTRUCTIONS

4338

OUTPUT

1 2 3 4 5

42414039

Fig. 4 DG-MA Rear Panel Layout

[38] Audio Input Jack Accepts audio playback from

[39] Audio Output Jack Provides audio for recording to a DVR, VCR, etc.

[40] Control Terminal Block Connects to the DG-12II Base Station and provides talkback

control and audio to DG-12II.

[41] DG-12II Input Jack Accepts monitored audio from DG-12II. Audio is transmitted

through the Monitor Speaker[36].

[42] Power Cord Connects to 120 Vac line.

[43] Fuse Holder Holds the power fuse of the unit. Fuse is 1.5A slow-blow.

a DVR, VCR, etc.

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DG_12II_6/11

OPERATION:

INSTALLATION AND OPERATING INSTRUCTIONS

The DG-12 Audio Alarm Base Station is normally paired with the DG-MA

II

Monitor/Talkback Amplifier for utilizing the monitor and talkback capabilities of the unit.
The operation below includes the DG-MA unit.

The Keyswitch[14] has three functions. At position 1, it turns “OFF” the power to the
DG-12II. At Position 2, it turns “ON” power as indicated by the Power Indicator LED[3].
At Position 3, it turns “ON” the Sonalert Buzzer[4] while the power is still “ON”. The key
can be pulled out at any of these positions for security purposes.

When a microphone picks up sound within its vicinity, the bi-color zone Alarm Indicator
LED[2] will start to glow “green”. The brightness depends on the intensity and type of
audio the microphone is picking up. As long as there is noise present near the
microphone, the green light will continue to blink. This would signal the operator that
somebody is out there in that particular zone. When the audio exceeds the threshold
level setting. the unit will go into alarm. At this time, the Alarm Indicator LED[2] for that
zone will change color from “green” to “red” indication an alarm condition and produce a
3-second audio alert from the Sonalert Buzzer[4]. When the alarm has occurred the
audio from that zone can be monitored on the DG-MA Monitor Speaker[36] or
headphone by moving the alarmed Zone Selector Switch[1] to “monitor” (UP position).
Monitor level is adjusted with the Monitor Level Control Knob[34] on the DG-MA panel.
The alarm is canceled by pressing the Reset Switch[12].

Selecting the “monitor” position for one or more zones allows the audio to be monitored
without an alarm occurring when the Non-Alarm Monitor Switch[14] is in the “ON”
position. The level is controlled by the Monitor Level Control[34] on the DG-MA.

When a Zone Selector Switch[1] is in the “monitor” position (UP) and an alarm occurs,
audio is immediately present on the built-in Monitor Speaker[36] or optional
Headphones[34].

Alarm threshold settings can be adjusted by pushing the Night Sensitivity Setting

Pushbutton[20] or Day Sensitivity Setting Pushbutton[21]. The Day/Night
Sensitivity Switch[9] selects which sensitivity setting pushbuttons are active. When
the Day/Night Sensitivity Switch[9] is in the UP position, all the Night Threshold
Sensitivity Switches[20] are activated. The switches can now be adjusted to their

proper settings. When the Day/Night Sensitivity Switch[9] is in the DOWN position, all
the Day Threshold Sensitivity Switches[21] are activated. The sensitivity setting
pushbutton switches are factory preset to a certain threshold. This can be used as a
reference setting.

The Alarm Delay Setting Pushbutton[19] is factory set to 0.1 second (minimum or no
delay). It can be adjusted to the desired time (up to 3.2 seconds) by placing the Time
Delay Switch[5] UP and pushing the Alarm Delay Setting Pushbutton[19] one step at
a time to increment the increase. The DG-12II can be triggered using the Tester Trigger

Pushbutton[10] to determine the alarm delay as seen on the Alarm Delay
Indicator[18].

Talkback to a given zone is accomplished by plugging the provided handheld microphone
into the AUX MIC Jack[30] on the DG-MA front panel and holding down the respective

Zone Selector Switch[1]. To talk to all zones at once, press the All Call Pushbutton
Switch[33]. The volume of the talkback audio present at the zone is set to the Talkback

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DG_12II_6/11

Level Control[31] on the front of the DG-MA.

INSTALLATION-Mechanical:

The DG-12II and DG-MA units mount to a 19” wide equipment rack. They should be
located away from extreme dampness or heat to ensure long life and reduce
maintenance requirements. Adequate space should be provided around the units when
placed inside the rack to prevent heat build-up due to poor air circulation. The air must
be vented out of the cabinet. The fan's filter filament should be taken out of the guard
and cleaned with warm water after 3 months and replaced every six months. The filer
filament should be cleaned with warm water after 3 months and replaced every six
months. The filter filament should be cleaned more often when subjected to dust or dirt.
Additional filter filaments can be obtained from Louroe Electronics. (Part #28-0074-1).

INSTALLATION-Electrical:

All electrical installations are made at the rear of the unit.

INSTALLATION AND OPERATING INSTRUCTIONS

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DG_12II_6/11

INSTALLATION AND OPERATING INSTRUCTIONS

MICROPHONE AND SPEAKER CONNECTIONS (CONNECTIONS TO MODEL TLI):

Connect WEST PENN 356 (sample cable used) to remote station such as a Louroe TLI as
shown in Fig. 5 below. Connect the 3 wires wrapped with a shield (red, black and bare) to
microphone terminals marked “A”, “B”, and “C”. Red to “A”, black to “B” and bare or drain
wire to “C”. Connect the other two unshielded cables to speaker 70V transformer . Connect
green wire to proper transformer tap. See power tap table below for wattage. It is
recommended to use a lower wattage tap when two or more speakers are used or for “All
Call” function. Connect white wire to black wire of transformer, using wire nuts for
connections.

See Fig. 6 for connection diagram using model TLMC (speaker/microphone unit).

A B

A

Mounting TLI to VPSC Housing

Place TLI inside VPSC matching the 4
mounting screws and secure with
furnished nuts and washers.

No knockouts are provided on the
VPSC. Bore a 3/4” opening through for
connecting to TLI.

Blue

Green

C

Yellow

B

C

A

Red

B

Black

C

Drain

Green

White

Black

Green Wire - of West Penn 356
connects to the proper power tap

White Wire - of West Penn 356

Red

connects to Black wire from the TLI
Transformer using a wire nut.

Speaker Power Tap Table

Green Lead 70V 5 Watts
Yellow Lead 70V 2.5 Watts
Blue Lead 70V 1.25 Watts
Red Lead 70V .62 Watts
Black Lead 70V Common

To Louroe Audio Base Station
or other Audio Receiving Device

Fig. 5 Connection Diagram using TLI (speaker/microphone

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DG_12II_6/11

Speaker Positive

Speaker Return Wire

MIC +12VDC Supply

MIC Audio

Ground

Normal or Timed Audio

Selector Switch

INSTALLATION AND OPERATING INSTRUCTIONS

Rear of TLMC

SP

6
7

A
B
C

Time Selector
Dip Switch

600 Ohm / 70 Volt

Selector Switch

Factory Set at 70V

WIRING REQUIREMENTS

4 Conductor consisting of:

+

2 Conductor shielded, 20 gauge
with 22 gauge drain (microphone
connection)

+

2 Conductor unshielded, 18 gauge

(speaker connection)

All in the same jacket

West Penn 356 or equivalent

For two-way talk/listen applications

Fig. 6 Connection diagram using TLMC (speaker/microphone unit)

To Base Station

Speaker Level Control
Factory Set
Do Not Adjust

Call Button

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DG_12II_6/11

INSTALLATION AND OPERATING INSTRUCTIONS

CONNECTIONS TO PLUG-IN CONNECTOR (AUDIO):

Prior to connecting the microphone cables to the DG-12 plug-in connectors, each
microphones should be checked for proper operation. This can be done quickly by
connecting the Louroe PTA (portable test amplifier) to each microphone cable. The battery
powered PTA powers the microphone under test and monitors its output though the installed
cabling. This eliminates any faulty microphone circuits before final testing. After each
microphone is tested, connect cables coming from remote station or MLA-6 Mixer to the
5-pin plug-in connector (supplied) as shown in Fig. 7. Observe wire color coding. When no
speaker is used in the remote station, there are no connections made on terminals marked
“SP” and “G”.

REAR OF DG-12II

5-PIN CLOSED HEADER

5-PIN PLUG IN CONNECTOR (SUPPLIED)

AUDIO

3-PIN CLOSED HEADER

A

RED

B

BLACK

C

SP

BARE

II

3-PIN PLUG IN CONNECTOR

NC

COM

G

WHITE

RELAY

NO

GREEN

FROM MLA-6 OR TLI (SPEAKER/MICROPHONE UNIT)

Fig. 7 Connections to the DG-12 using 5-pin connectorII

RELAY CONNECTIONS:

One single pole, double throw relay contact is available from each zone alert circuit, for
connections to outside equipment. Each relay contains three terminal outputs: COM
(common), NC (normally closed) and NO (normally open). Connection to the outside
equipment can be done by connecting the cable to the 3-pin plug-in connector (supplied)
as shown in Fig. 7. To prevent losing the connectors until needed, plug the connectors to
the headers in the rear panel of the DG-12II when relay outputs are not in use. Maximum
rating of the relay contact is 0.5A @ 125 Vac or 1.8A @ 30 Vdc. DO NOT EXCEED
CURRENT RATING OR RELAY MAY BE DAMAGED.

CONNECTOR TO HEADER CONNECTIONS:

With power OFF, plug in the 5-pin plug-in connector to its respective header at the rear of
the DG-12II. See Fig. 7. Plug-in connector for zone 1 to header of zone 1; connector for
zone 2 to header of zone 2, etc... Plug in the 3- pin plug in connector to its respective relay
header. Push the connector firmly against the header until the lock snaps in.

WEST PENN 356

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DG_12II_6/11

INSTALLATION AND OPERATING INSTRUCTIONS

DG-12II AND DG-MA CONNECTIONS

Connect the DG-12II to the DG-MA as shown in Fig 8. Both control blocks of the
DG-12II and DG-MA are marked “1,2,3,4,5. Connect terminal “1” of DG-12II to terminal
“1” of DG-MA. Connect terminal “2” of DG-12II to terminal “2” DG-MA; terminal “3” of
DG-12II to terminal “3” of DG-MA; terminal “4” of DG-12II to terminal “4” of DG-MA;
terminal “5” of DG-12II to terminal “5” of DG-MA. Connect the RCA cable between the
DG-12II and DG-MA as shown in Fig 8.

ZONE 9

ZONE 10

INPUT

AUDIO

JP51

ZONE 7

TB AUDIO

ALL CALL CTRL

TB RETURN

GND

8

TB GND

ZONE 8

Rear of DG-12II

RCA Cable

Rear of DG-MA

OUTPUT

1 2 3 4 5

Fig. 8 Connecting the DG-12 to DG-MAII

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DG_12II_6/11

INSTALLATION AND OPERATING INSTRUCTIONS

CONNECTION TO A DVR, VCR OR OTHER RECORDING DEVICE:

Remove the jumper (FIG.9A) that connects the Audio Input Jack[38] to the Audio

Output Jack [39] located at the rear of the DG-MA. Using a dual RCA cable, connect the
Audio Input Jack[38] of the DG-MA to the Audio Output Jack of the recorder. Connect

the Audio Output Jack[39] of the DG-MA to the Audio Input Jack of the recorder. See
Fig. 9 below.

RECEIVING DEVICE

AUDIO

OUT

IN

RCA CABLES

NOTE:
If DG-MA is not connected
to a recording device,
jumper must be plugged
into the audio input and
output. Otherwise DG-MA
will not receive audio from
the remote microphone.

JUMPER

REAR OF DG-MA

INPUT

AUDIO

OUTPUT

Fig. 9 Connecting to a Receiving Device

REAR OF DG-MA

INPUT

AUDIO

OUTPUT

Fig. 9A Jumper Connection

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DG_12II_6/11

INSTALLATION AND OPERATING INSTRUCTIONS

CONNECTION TO AN AUDIO MIXER/COMBINER:

Up to six microphones or four speakers can be installed in one zone by using Louroe
MLA-6 audio mixer;/combiner unit. See Fig. 10 for connecting speaker/microphone
combination units and Fig. 11 for microphone only unit. Fig. 10 shows connection for
only one speaker/microphone unit. Additionally, up to 6 microphones and 4 speakers
can be installed to this unit by connecting the microphone cables to inputs “MIC 2”
through “MIC 6”. Speaker cables are connected to the remaining terminals of the
speaker terminal block. Speaker “HIGH” side denotes the positive and the ”LOW” side
denotes the negative or speaker return terminal. Fig. 11 shows connection for two
microphones. Additional microphones are connected the same way as shown for
“MIC 1” and “MIC 2”.

MLA - 6 (Audio Mixer / Combiner)

Red

Black

Bare

Red
Black
Bare

Green

White

Green

White

West Penn 356

West Penn 356

- 4 Conductor Audio Cable

- 2 Shielded #20 AWG

- 2 Unshielded #18 AWG

- 1 Drain Wire #22 AWG
(for Microphone ground)

To Base Station

To Speaker/Microphone

Fig. 10 Connecting MLA-6 to DG-1211 and speaker/microphone unit (TLI, TLMC..)

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DG_12II_6/11

INSTALLATION AND OPERATING INSTRUCTIONS

CONNECTION TO AN AUDIO MIXER/COMBINER (cont.):

Fig. 11 shows connection for two microphones. Additional microphones are connected
the same way as shown for “MIC 1” and “MIC 2”.

MLA - 6 (Audio Mixer / Combiner)

Red

Black

Bare

WIRING REQUIREMENTS

2 Conductor shielded cable, 22
gauge with a 24 gauge drain wire

NOTE: Unshielded cable is not

satisfactory for audio systems

West Penn 452 or equivalent

FOR ONE-WAY LISTEN APPLICATIONS

Red
Black
Bare

West Penn 452

To Base Station

Mic 1

Mic 2

Fig. 11 Connecting MLA-6 to DG-12II and remote microphones

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DG_12II_6/11

POWER CONNECTIONS:

INSTALLATION AND OPERATING INSTRUCTIONS

Plug the DG-12 power supply unit to the 3-pin right angle closed Power Header[29]

II

marked “15 Vdc” located at the rear of the DG-12II unit. Push firmly and make sure that
the locking tables hold the plug-in connector in place. Plug the power supply to a 110 Vac
outlet. Plug the DG-MA AC cord to a 110 Vac outlet

PUSH IN

&

RELEASE

Black

Green

White

to power source

Fig. 12 Connecting power supply to DG-12II

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DG_12II_6/11

INSTALLATION AND OPERATING INSTRUCTIONS

PARALLELING TWO DG-12II’s:

ZONE 9

ZONE 10

DG12II #1

ZONE 9

ZONE 10

ZONE 7

ZONE 8

ZONE 7

ZONE 9

Two DG-12 units can be paralleled so that a zone can be

II

monitored and controlled from two different locations. See fig. 13
for interconnection diagram between two DG-12II’s and DG-MA.
See Fig. 14 for interconnecting the two plug-in connectors of two
DG-12II’s. Note that only one DG-12II gives power to the
remote microphone as shown by two end cables not connected.
The plug-in connector on the left hand side is the one giving
power to the remote station. No cable is connected to the “A”
terminal of the other connector. These plug-in connectors plug
into the Mic/Talkback 5-Pin Header[24] at the rear panel of the
respective DG-12II.

“A” terminal not used
at second DG-12II

DG12II #2

INPUT

AUDIO

OUTPUT

1 234

5

DG-MA

Fig. 13 Paralleling two DG-12II’s

G

SP

C

B

A

A

B

C

SP

G

Fig 14 Paralleling two plug-in connectors of two DG-12II’s

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DG_12II_6/11

INSTALLATION AND OPERATING INSTRUCTIONS

CONNECTING AN EXTERNAL AMPLIFIER:

An external amplifier can be connected between the DG-MA and DG-25III to boost the
power of its talkback capability. The DG-MA is factory set with a 70V audio output. Before
connecting to an external amplifier, change the audio output to 600 Ohms as follows.

Remove the top lid or cover of the DG-MA is a slide switch located near the large black

capacitor and with the number 230 visible. The switch position is factory set at 70V

output which is towards the center of the PC board. Insert a small screwdriver into the

slot of the switch lever and slide the switch to the left or towards the power transformer. A

115 mark will appear. This will change the audio output to 600 and will serve as a pre-

amp for the external amplifier. Replace the cover of the DG-MA.

See Fig. 15 for the cable interconnection between units. The “Audio in” and “Audio Out”

Terminal of the external amplifier can be RCA jacks. In such case, the interconnect cable

between the DG-MA Control Terminal Block [40] numbers “1” and “3” and external

amplifier “Audio In” should be two spade lug terminals on one end and on RCA plug on

the other. Also the cable between “Audio Out” of the external amplifier and DG-12II plug-

in connector numbers “3” and “5” should be an RCA plug on one end and two open tinned

wires on the other. Double check the connections before testing. The talkback will not

work properly if the connections are interchanged.

REAR OF DG-MA

INPUT

ZONE 9

REAR OF DG-12II

TB GND

GND

ALL CALL CTRL

TB AUDIO

TB RETURN

JP51

ZONE 7

AUDIO

OUTPUT

1 2 3 4 5

GND

AUDIO IN

SPEAKER

RETURN

EXTERNAL AMPLIFIER

ZONE 10

AUDIO

OUT

ZONE 8

Fig. 15 Connecting an external amplifier

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DG_12II_6/11

OPERATION AND TEST:

INSTALLATION AND OPERATING INSTRUCTIONS

1). Apply power to the DG-12 and DG-MA. Turn “ON” the switch of the DG-12 power supply unit.

II II

Using the Keyswitch[16], turn “ON” power to the DG-1211 by rotating clockwise to “ON” position.
The Power Indicator LED[3] located on the top right hand corner of the front panel will light.
Turn “ON” power to the DG-12II Tester by pushing the Tester Power Switch[12]. The Audio
Level Indicator[17] and Alarm Delay Indicator[18] will light. Turn “ON” power to the DG-MA by
rotating the Monitor Level control Knob[35] clockwise. The Power LED[36] will light.

2). Place all Zone Selector Switches[1] to neutral or mid position.

3). Place the Non-Alarm Monitor Switch[14] to “ON” (UP) position.

4). One at a time, switch each zone Selector Switch[1] to “monitor” (UP) position. Check that each
zone has a clear audio output as heard through the DG-MA Monitor Speaker[36]. Adjust the
Monitor Level Control[34] on the DG-12II to comfortable listening level.

5). Return all Zone Selector Switches[1] to neutral (MID) position.

6). To set the threshold sensitivity of each zone, another person at the remote station is needed to
generate a normal background noise (like people having a conversation) and an alarm noise such
as someone screaming or yelling).

7). Place Day/Night Sensitivity Switch[9] in “DOWN” position to select the day sensitivity.

8). Place all zone Selector Switch[1] to “monitor” (UP) position and the Non-Alarm Monitor
Switch[14] to OFF position (DOWN).

9). Push Reset Switch[12] to cancel all alarms. All Alarm Indicator LED's[2] should be “OFF”

10). There should be no audio at the Monitor Speaker[35] on the DG-MA unit. the Alarm Indicator
LED[2] is OFF until a sound is picked up by the microphone, then the LED will Start to blink
green.

11). Using an alien nut driver, remove the cover of the modules.

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DG_12II_6/11

22

INSTALLATION AND OPERATING INSTRUCTIONS

7

21

INCREASE

DECREASE

6

INCREASE

DECREASE

Fig. 16 Setting the audio threshold sensitivity

OPERATION AND TEST (cont.):

12). Set the audio threshold as follows:

a. Connect the cable with a 3.5mm mono plug on both ends (supplied) between the

Audio Alarm Input Jack[6] and Audio Alarm Output Jack[22]. See Fig. 16.

b. The Audio Level Indicator[17] contains 10 level segments, 7 green and 3 red

that luminate and move up and down the scale, depending upon the amount of
alarm signal coming from the Audio Alarm Output Jack[22]. The closer the
green segment moves up to the red area, the more sensitive the unit becomes,
the further the green segments are from the red area, the less sensitive it
becomes. In setting audio threshold, the lumination should not go past the last
green segment. If it enters the red area, then the threshold sensitivity is too high.
When the last red segments is illuminated and remains lit for the duration of the
predetermined time delay (from 0.1 to 3.2 seconds) the unit goes into alarm.

c. Flip the Threshold Sensitivity Switch[7] DOWN to decrease the sensitivity, and

UP to increase sensitivity.

d. Push and release quickly the Day Sensitivity Setting Pushbutton[21] once or

twice while observing the Audio Level Indicator[17]. If the audio level does not
pass the last green segment, the setting is near correct but an actual check is
necessary. Another person is needed in the remote area to generate some noise
to trigger the unit. The noise could be any loud sound such as a shout. If the unit
does not go into alarm after a loud sound is generated, flip the Threshold
Sensitivity Switch[7] upwards to increase the sensitivity.

e. Push once and release quickly the Day Sensitivity Setting Pushbutton[21].

Again generate a loud noise to trigger the alarm. These miniature pushbutton
switches are very sensitive. If you hold this switch for about a second long, it will
go to the next step. These switches can be pushed up to a maximum of 32 times.
Additional pushes beyond 32 have no effect on the switch.

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DG_12II_6/11

INSTALLATION AND OPERATING INSTRUCTIONS

19

23

INCREASE

4

DECREASE

OPERATION AND TEST (cont.):

13). Set the alarm time delay as follow:

INCREASE

DECREASE

8

Fig. 17 Setting the alarm time delay

a. Connect the second test cable with a 3.5mm stereo plug on one end and a

3-pin din plug on the other (supplied) between the Alarm Delay Output
jack[23] and the Alarm Delay Input Jack[8]. See Fig. 17 above. Plug the 3.5
mm plug to the Alarm Delay Output Jack[23] of zone 1 module (first from the
left).

INCREASE

DECREASE

7

5

b. Push the Tester Reset Pushbutton[11]. The time shown on the Alarm Delay

Indicator [18] should reset to “0.0” (zero). The time is measured in seconds.

c. Starting with zone 1 module, push and released immediately the Tester Trigger

Pushbutton[10]. The unit will go into alarm. The Alarm Indicator LED[2] will
turn from green to red.

d. Check the reading on the Alarm Delay Indicator[18]. It should indicate the

factory setting for the length of time the alarm should stay on before the unit
foes into alarm (0.1's).

e. If the required time delay for that zone needs to be increased, flip the Time

Delay Switch[5] upwards.

f. Push the Tester Reset Pushbutton[11] to reset the time delay to zero as

shown by the Alarm Delay Indicator[18].

g. Push and release quickly the Alarm Delay Setting Pushbutton[19] the

number of times necessary to attain the correct time delay.

h. Push the Tester Trigger Pushbutton[10]. Zone 1 will again go into alarm.

i. Check the reading of the Alarm Delay Indicator[18]. The new time is now

indicated. If the time is still below the desired time, repeat steps 13f thru 13i.

j. If the required time delay needs to be decreased, or after performing step 13g,

the time goes over, flip the Time Delay Switch[5] downwards.

k. Push the Tester Reset Pushbutton[11] to reset the time to zero.

l. Quickly push and release the Alarm Delay Setting Pushbutton[19] a number

of times necessary to attain the desired time.

m. Push the Tester Trigger Pushbuttton[10] Zone 1 will again go into alarm.

n. Check the reading of the Alarm Delay Indicator [18]. The new time is now

indicated. If the times is still below the desired time, repeat steps 10k thru 10m.

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DG_12II_6/11

INSTALLATION AND OPERATING INSTRUCTIONS

OPERATION AND TEST (cont.):

14) Repeat procedures for setting the audio threshold and alarm delay for the rest of the zones

starting at step 12.

15) To adjust threshold for night sensitivity, place Day/Night Sensitivity Switch[9] in “UP” position to

select the night sensitivity.

16). Repeat the procedure for setting the audio threshold starting at step 12. this time use the Night

Sensitivity Pushbutton for setting the threshold.

There is no need to adjust the alarm time delay for night setting. The time set during the day will

also be the same time for night setting.

TALKBACK TEST:

1). Plug the factory furnished handheld microphone into the AUX. Mic Jack[30] located on the

DG-MA panel

2). Set the Talkback Level Control[31] to mid range.

3) Talk to each zone one at a time by depressing each zone Selector Switch[1] to “talkback” while

an observer in the remote zone checks for loudness and cleaness of the output from each
speaker.

4). Press the All Call Pushbutton Switch[33] while using the talkback microphone to verify clear

output to all zones.

5). Determine best talkback audio level by adjusting Talkback Level Control[31] on DG-MA panel

during step 4, above.

NOTE: If a recorder is used, playback recorded audio to verify monitor operation.

Completion of the tests verifies the system is ready for use. The threshold for each zone should
now be set for the customer's requirements.

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DG_12II_6/11

INSTALLATION AND OPERATING INSTRUCTIONS

TROUBLESHOOTING:

POWER PROBLEMS

1). Unit is totally inoperative.
a. Check that units are receiving 120 VAC.
b. Make sure that the power supply unit of the DG-12II is turned “ON” and the LED is

lighted.

c. Push the Power Breaker[27] IN and release quickly to reset power on DG-12II.

2). Talkback totally inoperative.

a. Check fuse at rear of DG-MA. Unplug DG-MA from 120 Vac source before checking the

fuse.

3). No Microphone power.

a. Check for short on the DG-12II “A” terminals to “c” (ground). Remove short, If there is

still no + 15/VDC on the terminal, DG-12II power regulator maybe damaged.

AUDIO PROBLEMS

1). Loud sound in one zone causes alarm in another zone.
a. Microphone wires crossed between zones.

2). Talkback from DG-MA occurs in wrong zone.

a. Speaker wires crossed between zones.

3). Speaker monitors zones, but headphone does not.
a. Faulty headphone.

4). Zone microphone inoperative.

a. Check for + 15Vdc at microphone between terminals “A” and “C”.
b. Temporarily plug in the connector of a known working microphone from another zone to

the DG-12II Mic/Talkback 5-pin Header[24] of the inoperative zone to confirm that the
circuitry of the DG-12II is operative and to confirm that the problem is in the remote
microphone or cabling.

5). Zone speaker inoperative.

a. Check wiring from DG-12II and remote speaker. Check color coding.

6). No audio at speaker/headphone of DG-MA.

a. Check that the plugs of cable connecting DG-12II Audio Out Jack[28] and DG-12II

Input Jacks[41] on the DG-MA rear panel are making proper contact.

b. Check if the jumper cable between Audio Input Jack[38] and Audio Output Jack[39] is

present. Jumper cable must be left in place when no recorder is connected.

c. When used with a recorder interconnect cables. Replace recorder cables with factory

jumper at audio input/output jacks on the rear of DG-MA. If system works, recorder is
faulty.

7). Sonalert inoperative
A. Check position of Keyswitch[16].

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PAGE 24 of 28

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DG_12II_6/11

SUMMARY:

INSTALLATION AND OPERATING INSTRUCTIONS

The DG-12 Audio Surveillance Base Station and DG-MA Monitor/Talkback Amplifier
have been designed to give years of satisfactory service when operated in a reasonable
environment and connected according to factory recommendations.

Please check that the wiring and power connections conform to the above instructions.
In the event of malfunction, please follow the troubleshooting section carefully. Should
the problem persist, factory assistance is available from 8:00 AM to 4:00 PM Pacific time,
by calling [phone].

Thank you for selecting LOUROE ELECTRONICS products.

SPECIFICATIONS:

Operating temperature range + 32° to + 122° F
Input impedance (zone) 10 kW
Input impedance (talkback) 10 kW
Monitor frequency response 100Hz to 10 kHz
Output impedance (talkback) 70 Volt line
Output impedance (record) 10 kW
Output impedance (headset) 8 to 600W
Alarm duration 3 sec
Monitor output power (DG-MA) 2W rms into 8W
Talkback output power (DG-MA) 20W rms into 70V line
Module filter frequency response See figure on following page
Power supply input (DG-12II) 120 Vac. 6A 60 Hz
Power input (DG-12II) 15 Vdc, 5A, 60 Hz
Auto Reset Range 3 Sec to 3 Min

II

Dimensions (DG-12II) 19”W X 7”HX10 ½ “D
Dimensions (DG-MA) 19”WX3 ½ “H X 10 ½ “D

Weight (DG-12II) 13.5 lbs.
Weight ( DG-MA) 10 1bs.

Panel Finish Black anodize

5

0

-5

-10

-15

-20

-25

-30

2 3 4 5 6 7 8 9

20

1 2 3 4 5 6 7 8 9

DG-12 Module Alarm frequency responseII

1 2 3 4 5 6 7 8 9

1

20000100001000100

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PAGE 25 of 28

DG_12II_6/11

INSTALLATION AND OPERATING INSTRUCTIONS

GLOSSARY OF TERMS:

ALL CALL Addressing all zones simultaneously.

Audio Mixer/Combiner A unit usually installed with remote stations that mixes audio coming

from different provide an output to a base station (Ex: MLA 6 and RN-

2).

Base Station An audio monitoring console usually located at the security office

where all the output cables of the microphone, audio mixers and
speakers of different zones are connected, Examples of base
stations are DG-12II, DG-25III, ALA Series, etc.

Cabling A group of insulated conductors that is mechanically assembled or

twisted together. (e.g. 2- cond. shielded and a twisted pair
unshielded). An interconnection of cables between equipment.

Drain Wire An uninsulated wire in contact with a shield throughout its length.

Used for terminating the shield. It also serves as a ground cable
when connected to a microphone unit.

GND Ground

Handheld Microphone A dynamic microphone supplied with the Model DG-MA for talkback.

High Sensitivity Settings Alarm threshold settings which also correspond to NIGHT settings,

where a small amount of noise picked up by the microphone will set
off the alarm in the base station.

Input The terminals on the apparatus to which signal is applied.

Jacket Pertaining to wire and cable, the outer protective covering; may also

provide additional insulation.

Low Sensitivity Settings Alarm threshold settings which also correspond to DAY settings,

where higher sound level is necessary to trigger the alarm in the
base station.

Microphone A remote station device capable of transforming a measurable quality

of intelligence (such as sound) into relative electrical signals. (Ex:
Louroe Model TLI, TLO, TLMC and TLM)

Microphone/Speaker Combination Unit a remote station unit consisting of a microphone with pre-amp

and a separate speaker, capable of monitoring as well as addressing
an area or zone; a two way Talkback/Listen device. (Ex: Louroe
Model TLI, TLO, TLMC, TLSP AND TLI Jr).

Monitor To listen to incoming audio pick-up by the microphone in a

surveillance zone.

Output The useful power of signal delivered by a device.

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PAGE 26 of 28

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DG_12II_6/11

INSTALLATION AND OPERATING INSTRUCTIONS

GLOSSARY OF TERMS (cont.):

Plug-in Connector The connector supplied where all the cables coming from remote

station units (microphones and speakers) are connected before they
are plugged into the vertical header (socket) at the rear panel of the
base station (DG-25III).

PTA (Portable Test Amplifier) A portable audio amplifier for testing microphone audio output

during field Installation.

Remote Station A device or unit (typically a Louroe speaker/microphone) located

and installed in a remote area or in a surveillance zone for purpose
of monitoring audio or generating an alarm to the Louroe base
station.

Relay An electromechanical switch in which a change of current or voltage

in one circuit can be made to produce change in the electrical
conditions of another circuit.

Relay COM Contact Common contact of a relay. This contact transfers from the NC

(normally closed) contact to NO (normally open) contact when the
relay is energized, and reverse when de-energized.

Relay NC Contact Normally closed contact of a relay. This contact opens whenever

the relay coil is energized.

Shielded Cable An insulated wire that has been shielded by a copper braid or tape.

An aluminum foil or a semi-conductive vinyl.

Speaker A term to refer to a loudspeaker located in the remote station. This

unit can be used by itself for talkback-only operation, or in
combination with microphone for two-way communication.

Talkback A term used for addressing a speaker in a remote station or a zone,

or addressing all the speakers simultaneously during ALL CALL
talkback operations.

Threshold An audio level limit, when exceeded, it will cause the base station to

go into alarm.

Zone An area of coverage where the remote stations are installed for

audio surveillance. A large area can be divided into several zones
to maximize the surveillance coverage. Six microphones or four
speaker/microphones can be used per zone. It is also an area
designation for ease of identifying the alarmed location. (Example: A
stairwell or elevator lobby).

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PAGE 27 of 28

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DG_12II_6/11

INSTALLATION AND OPERATING INSTRUCTIONS

NOTES

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PAGE 28 of 28

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DG_12II_6/11

MANUFACTURED

IN THE

When this equipment is used as part of an
audio monitoring system, the law requires
that the public be given notice of AUDIO
MONITORING ON THE PREMISES. A
deca l noti ce is includ ed with each
microphone shipped.

Federal Law References:
Federal Regulations, US Code, Title 18.
Crime and Criminal Procedure, Sec 2510.

LOUROE ELECTRONICS warrants that at the time of shipment products manufactured by LOUROE ELECTRONICS to be free of defects in material and workmanship.
Should a defect appear within one year (12 months) from date of shipment, LOUROE ELECTRONICS will, at its sole discretion, repair or replace the defective equipment.
This equipment shall not be accepted for repair or return without prior notification by LOUROE ELECTRONICS .

This warranty does not extend to any Louroe product that has been subjected to improper or incorrect installation, misuse, accident, or in violation of installation
instructions provided by LOUROE ELECTRONICS.

Returned shipments to LOUROE ELECTRONICS shall be at customer’s expense. LOUROE ELECTRONICS will return the equipment prepaid via best way.

®

®

®

IMPORTANT NOTICE

AUDIO

MONITORING

These Premises

WARRANTY

On

®

®

®

®

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PAGE 28 of 28

DG_12II_6/11