Louroe Electronics DG-12II User manual

2 Conductor shielded cable, 22
gauge with a 24 gauge drain wire
NOTE: Unshielded cable is not
satisfactory for audio systems
WIRING REQUIREMENTS
West Penn 452 or equivalent
FOR ONE-WAY LISTEN
DG-12II 2/08
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
MODEL DG-12II
MODEL DG-MA
E
LOUROE
LECTRONICS
6955 VALJEAN AVE, VAN NUYS, CA 91406
PH: [phone] / FAX: [phone]
[email protected] / www.louroe.com
DG-12II and DG-MA
SOUND ACTIVATED BASE STATION
INSTALLATION AND OPERATING INSTRUCTIONS
Monitor/Talkback amplifier
provides:
6Two-way listen/talkback
between base station
& remote units
6“All-Call” for addressing all
zones simultaneously
(12 zones maximum)
6Input/output to DVR/VCR for
audio recording & playback
COMPANION DG-MA

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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INSTALLATION AND OPERATING INSTRUCTIONS
DG-12II 2/08

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.
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
NOTE: Unshielded cable is not recommended for
microphone connections.
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
22-gauge drain wire.
Speaker Connection: 2 Conductor unshielded, 18-gauge
West Penn 356 or equivalent
DG-12II
PAGE 1 of 28
AUDIO BASE STATION
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INSTALLATION AND OPERATING INSTRUCTIONS
DG-12II 2/08

Fig. 1 DG-12 Front Panel LayoutII
PAGE 2 of 28
DESCRIPTION:
The DG-12 Audio Alarm Base Station is of panel construction and mounts in a standard 19”
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.
II
[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. 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
Located on side of chassis.
567
123
4
POWER
SET-UP CONTROLS
MONITOR
TALKBACK
ZONES
E
LOUROE
L EC TRO N IC S
TIME
DELAY
THRESHOLD
SENSITIVITY SENSITIVITY RESET NON-ALARM MONITOR
ALARM INPUT ALARM DELAY INPUT TIME RESETTRIGGER POWER
ALARM LEVEL ALARM DELAY
DG-12II
AUTO-RESET OFF
ON
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INSTALLATION AND OPERATING INSTRUCTIONS
DG-12II 2/08
ON/AUDIO ALERT

PAGE 3 of 28
settings.
[8] Alarm Delay Input Jack Used for testing the length of alarm delay settings as shown by the
Alarm Delay Indicator[18].
[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.
8 9 11 10 12 13 14 15
Fig. 1 DG-12 Front Panel LayoutII
POWER
SET-UP CONTROLS
MONITOR
TALKBACK
ZONES
E
L
OUROE
L EC TRO N IC S
TIME
DELAY
THRESHOLD
SENSITIVITY SENSITIVITY RESET NON-ALARM MONITOR
ALARM INPUT ALARM DELAY INPUT TIME RESETTRIGGER POWER
ALARM LEVEL ALARM DELAY
DG-12II
AUTO-RESET OFF
ON
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INSTALLATION AND OPERATING INSTRUCTIONS
DG-12II 2/08
ON/AUDIO ALERT

PAGE 4 of 28
[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
[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.
Fig. 1 DG-12 Front Panel LayoutII
16 17 18
19
20
21
22
23
POWER
SET-UP CONTROLS
MONITOR
TALKBACK
ZONES
E
LOUROE
LE CTR O N ICS
TIME
DELAY
THRESHOLD
SENSITIVITY SENSITIVITY RESET NON-ALARM MONITOR
ALARM INPUT ALARM DELAY INPUT TIME RESETTRIGGER POWER
ALARM LEVEL ALARM DELAY
DG-12II
AUTO-RESET OFF
ON
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DG-12II 2/08
ON/AUDIO ALERT

PAGE 5 of 28
[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).
Fig. 2 DG-12 Back Panel LayoutII
24 25 26
27 28 29
TO RESET
PUSH IN
&
RELEASE
AUDIO OUT
1 2 3 4 5
TB GND
TB RETURN
TB AUDIO
ALL CALL CTRL
GND
JP51
15VDC. 8A
+15VDC GND
ZONE 1ZONE 3ZONE 5ZONE 7ZONE 9
ZONE 12 ZONE 10 ZONE 8 ZONE 6 ZONE 4 ZONE 2
ZONE 11
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DG-12II 2/08

PAGE 6 of 28
DG-MA
DESCRIPTION:
The DG-MA Monitor/ Talkback Amplifier is of panel construction and mounts in a
standard 19” equipment rack.
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 600Ωmay 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.
30 31 32 33 34 35 36
37
TALKBACK
INDICATOR
MIC
ALL
CALL
MONITOR
LEVEL HEADPHONES
TALKBACK
LEVEL
POWER
DG-MA
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DG-12II 2/08

PAGE 7 of 28
[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.
Fig. 4 DG-MA Rear Panel Layout
42414039
4338
INPUT
AUDIO
OUTPUT 1 2 3 4 5
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DG-12II 2/08

PAGE 8 of 28
OPERATION:
The DG-12 Audio Alarm Base Station is normally paired with the DG-MA
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
II
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PAGE 9 of 28
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.
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DG-12II 2/08

PAGE 10 of 28
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).
Fig. 5 Connection Diagram using TLI (speaker/microphone
A
B
C
A B
C
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
A
B
C
Drain
Red
Black
Red
Green
Yellow
White
Green
Blue
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.
To Louroe Audio Base Station
or other Audio Receiving Device
Black
Green Wire - of West Penn 356
connects to the proper power tap
White Wire - of West Penn 356
connects to Black wire from the TLI
Transformer using a wire nut.
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DG-12II 2/08

PAGE 11 of 28
Fig. 6 Connection diagram using TLMC (speaker/microphone unit)
Rear of TLMC
Speaker Positive
Speaker Return Wire
MIC +12VDC Supply
MIC Audio
Ground
Normal or Timed Audio
Selector Switch
600 Ohm / 70 Volt
Selector Switch
Factory Set at 70V
To Base Station Call Button
Time Selector
Dip Switch
Speaker Level Control
Factory Set
Do Not Adjust
SP67ABC
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INSTALLATION AND OPERATING INSTRUCTIONS
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
DG-12II 2/08

PAGE 12 of 28
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”.
II
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.
Fig. 7 Connections to the DG-12 using 5-pin connectorII
ABCSPG
COM
NC
NO
5-PIN CLOSED HEADER 3-PIN CLOSED HEADER
5-PIN PLUG IN CONNECTOR (SUPPLIED)
AUDIO
3-PIN PLUG IN CONNECTOR
RELAY
REAR OF DG-12II
WEST PENN 356
BLACK
RED
BARE
GREEN
WHITE
FROM MLA-6 OR TLI (SPEAKER/MICROPHONE UNIT)
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PAGE 13 of 28
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.
Fig. 8 Connecting the DG-12 to DG-MAII
ZONE 9 ZONE 7
ZONE 8
ZONE 10
1 2 3 4 5
TB GND
TB RETURN
TB AUDIO
ALL CALL CTRL
GND
JP51
INPUT
AUDIO
OUTPUT
Rear of DG-MA
Rear of DG-12II
RCA Cable
8
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PAGE 14 of 28
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.
Fig. 9 Connecting to a Receiving Device
Fig. 9A Jumper Connection
INPUT
OUTPUT
AUDIO
IN OUT
RECEIVING DEVICE
RCA CABLES
REAR OF DG-MA
INPUT
OUTPUT
AUDIO
JUMPER
REAR OF DG-MA
AUDIO
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.
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PAGE 15 of 28
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”.
Fig. 10 Connecting MLA-6 to DG-1211 and speaker/microphone unit (TLI, TLMC..)
MLA - 6 (Audio Mixer / Combiner)
To Base Station
To Speaker/Microphone
Green
White
Green
White
Red
Black
Bare
Red
Black
Bare
West Penn 356
- 4 Conductor Audio Cable
- 2 Shielded #20 AWG
- 2 Unshielded #18 AWG
- 1 Drain Wire #22 AWG
(for Microphone ground)
West Penn 356
LOUROE ELECTRONICS 6955 VALJEAN AVENUE, VAN NUYS, CA 91406 TEL [phone] FAX [phone]
Website: www.louroe.com Email: [email protected]
(818)
INSTALLATION AND OPERATING INSTRUCTIONS
DG-12II 2/08

PAGE 16 of 28
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”.
Fig. 11 Connecting MLA-6 to DG-12II and remote microphones
To Base Station Mic 1
Red
Black
Bare
Red
Black
Bare
Mic 2
West Penn 452
MLA - 6 (Audio Mixer / Combiner)
LOUROE ELECTRONICS 6955 VALJEAN AVENUE, VAN NUYS, CA 91406 TEL [phone] FAX [phone]
Website: www.louroe.com Email: [email protected]
(818)
INSTALLATION AND OPERATING INSTRUCTIONS
2 Conductor shielded cable, 22
gauge with a 24 gauge drain wire
NOTE: Unshielded cable is not
satisfactory for audio systems
WIRING REQUIREMENTS
West Penn 452 or equivalent
FOR ONE-WAY LISTEN APPLICATIONS
DG-12II 2/08

PAGE 17 of 28
POWER CONNECTIONS:
Plug the DG-12 power supply unit to the 3-pin right angle closed Power Header[29]
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
II
Fig. 12 Connecting power supply to DG-12II
PUSH IN
&
RELEASE
Black
Green
White
to power source
LOUROE ELECTRONICS 6955 VALJEAN AVENUE, VAN NUYS, CA 91406 TEL [phone] FAX [phone]
Website: www.louroe.com Email: [email protected]
(818)
INSTALLATION AND OPERATING INSTRUCTIONS
DG-12II 2/08