Address all communications and shipments to:

2645 Federal Signal DriveUniversity Park, IL 60466-3195(888)751-1500

Atkinson Dynamics Intercoms

Models AD-26, AD-27, AD-56, and AD-57

Installation and Service Instructions

INSTALLATION AND SERVICE INSTRUCTIONS FOR ATKINSON DYNAMICSHEAVY-DUTY INTERCOMS

SAFETY MESSAGE TO INSTALLERS, USERS AND MAINTENANCE PERSONNEL

It is important to follow all instructions shipped with this product. This device is to be installed by atrained electrician who is thoroughly familiar with the National Electrical Code and will follow NECGuidelines as well as local codes. Marine installations shall be in accordance with Title 46, CFR,Parts 110-113.

The selection of the mounting location for the device, its controls and the routing on the wiring is tobe accomplished under the direction of the facilities engineer and the safety engineer. In addition,listed below are some other important safety instructions and precautions you should follow:

• This is not a listed safety device and is not intended to be used as such.

• Read and understand all instructions before installing or operating this equipment.

• Disconnect power before connecting or doing any maintenance on this intercom.

• All effective warning speakers produce loud sounds which may cause in certain situations,permanent hearing loss. You should take appropriate precautions such as wearing hearingprotection.

• After testing is complete, provide a copy of this instruction sheet to all operating personnel.

• Establish a procedure to routinely check the intercom installation for integrity and properoperation. Any maintenance must be performed by a trained electrician in accordance with NECguidelines and local codes.

• This device can be installed in climates with wind blown dust and rain or splashing water. Do notinstall this device in climates that exceed the unit's operating temperature range.

Failure to follow all safety precautions and instructions may result in property damage, seriousinjury, or death to you or others.

A. General Features.

The Atkinson Dynamics intercom is a heavy-duty, 2-way, communications device designed forindustrial applications. There are four basic models: AD-26, 12VDC; AD-56, 24VDC; AD-27,120VAC 50/60Hz; and AD-57, 240VAC 50/60Hz. The AC line is fused with a 1/2-amp 250volt type GMC fuse in the 120/240VAC units. A description of the available models follows.

Basic Model Specifications

Model AD-26 Model AD-56 Model AD-27 Model AD-57

Supply Voltage 12 VDC 24VDC 120VAC, 50/60 Hz 240VAC, 50/60 Hz

Audio Power

Output (Max.) 8.0 Watts 11.7 Watts 11.3 Watts 11.3 Watts

Power Consumption

(Max.) 20.0 Watts 39.6 Watts 28.8 Watts 30.5 Watts

Operating Current

(nominal) 1.47 A 1.65 A 0.240 A 0.127 A

Operating

Temperature -31°F to 150°F -31°F to 150°F -31°F to 150°F -31°F to 150°FShipping Weight 10 lbs. 10 lbs. 10 lbs. 11 oz. 10 lbs. 11 oz

Dimensions See Figure 20 See Figure 20 See Figure 20 See Figure 20

Ratings UL, cUL, Marine-Listed, CE (Model AD-27)NEMA-Type 4X (excluding microphone models), Type IP56 (Model AD-27)

Table 1

-1-

Additional Model Information

Letter Group Function/Feature

“A” Call button

“C” Master mode

“D” Slave mode

Number Group

“-1” Remote power

“-2” Provisions for external talk/listen switch (Foot pedal ready)

“-3” External call contacts for auxiliary signal

“-4” Extreme temperature use (-50°F to 150°F)

“-6” Designed for use in a zoned system

“-7” Provisions for hand-held noise canceling microphone

“-8” Additional pre-amp for use with remote slave speakerMiscellaneous

“-M22” Equipped with remote monitor switch

“-M34” Provisions for headset microphone with belt switch

“-M44” Remote speaker volume control

Table 2

MASTER UNITS:

“C” Models default to Master, or speaker, mode. In Master mode, the unit acts as a speaker andbroadcasts audio signals generated elsewhere in the intercom system. Depressing the Talk switchturns the unit into a microphone and enables the user to broadcast to all other intercoms in thesystem. Releasing the switch returns the unit to Master mode. Figure 4 illustrates a Master/Slaveintercom system.

SLAVE UNITS:

“D” Models default to Slave, or microphone, mode. In Slave mode, the unit is designed to serveas a hands-free microphone with transmission to all Master units in the intercom system. TheSlave unit will act as a speaker and broadcast audio transmissions only when the Talk switch ofany Master unit in the intercom system is depressed. Figure 4 illustrates a Master/ Slave intercomsystem.

CALL BUTTON:

“A” Models are equipped with a Call switch. Depressing the call switch transmits an 890Hz toneto all units in the intercom system.

CAUTIONThe call signal is louder than normal voice messages being carried on the line. Do not depress the

call switch while carrying on a conversation with someone on the system. This will subject thelistener to very loud sound levels.

The volume of the call signal is affected by the volume control on the receiving unit, so if volume isturned all the way down at a receiving station, the call signal will not be heard.

MICROPHONE:

“-7” Hand-Held Noise Cancelling Microphones are recommended for use in environments withhigh levels of ambient noise. Keying the microphone overrides the default mode of the intercomand enables audio transmission to all Master units in the intercom system. Figure 2 illustrates acommon intercom system where hand-held microphones are used.

-2-

-3-

HEADSET MICROPHONE WITH-BELT-SWITCH:

“M34” Headset Microphones and Belt Switches are an additional option for environments with ahigh level of ambient noise. Keying the belt switch overrides the default mode of the intercomand enables audio transmission to all Master units in the intercom system. Figure 5 illustrates acommon intercom system where a headset microphone and belt switch are used.

REMOTE POWER:

“-1” Models are designed to provide power to “-1” remote intercom units. The AC-powered mainunit provides 12 Volts DC-power and audio in the same cable to the remote unit. A “-1” unit canprovide power to just one remote unit. Figure 3 illustrates this configuration.

PRE-AMPLIFIER:

“-8” Models are equipped with a pre-amplifier and are designed for use with Slave speaker unitssuch as the AD-SV-25 Remote Speaker with Volume Control. The “-M44” option equips the “-8”Master unit with a knob for controlling the volume of remote speakers such as the AD-SF-25Flush Mount Speaker or the AD-SS-25 Swivel Mount Speaker. Figures 6 and 7 illustrate intercomsystems with the “-8” and “-M44” options.

EXTERNAL-POWER-SOURCE:

The use of an external power source allows the user to configure intercom systems made up of “-1” DC-powered Master and Slave units. Figure 8 illustrates such a system.

SURGE PROTECTION:

Metal Oxide Varistor (MOV) devices are used to protect the audio lines. The intercom must haveEarth or Chassis Ground terminated to it to ensure surge protection.

The output amplifier of the Atkinson Dynamics intercom offers full short circuit protection andoverheat protection on AC models only.

FOOT PEDAL READY:

Models with the “-2” option are designed for hands-free activation of the Talk/Listen switch.Figures 9, 10, and 17 show examples of intercoms with this option. A heavy-duty foot pedal(Model ADFP) is available through Atkinson Dynamics.

AUXILIARY SIGNAL:

Models with the “-3” option are equipped with a call button that provides a contact closure for anattention-getting auxiliary device, e.g. a strobe light. Figure 13 demonstrates an intercom systemwith this option. Atkinson Dynamics offers a low profile strobe light that is available with anamber or red lens, pipe or surface mount configuration, and in three voltage variations.

ZONED SYSTEM REMOTE:

Models with the “-6” option are designed for use in a zoned system. Figure 11 illustrates a zonedintercom system. A master intercom can select (via a switch box) to talk to any one or moreremotes in a system. Each remote unit is equipped with a Talk/Listen switch that enablescommunication to the master intercom, even when that zone is not selected. Atkinson Dynamicsoffers 6-zone and 12-zone switch boxes.

MONITOR SWITCH:

Models with the “-M22” option are equipped with a monitor on/off toggle switch. When themonitor switch is in the on position, the remote unit becomes a slave and defaults to talk mode.Figures 14 and 15 illustrate systems with this feature.

B. Unpacking.

After unpacking the Atkinson Dynamics Intercom, examine it for damage that may haveoccurred in transit. If the equipment has been damaged, do not attempt to install or operate it,and file a claim immediately with the carrier stating the extent of the damage. Carefully checkall envelopes, shipping labels and tags before removing or destroying them.

Before attempting to install the intercom, be sure that all parts listed in the KIT CONTENTSLIST have been supplied.

C. Kit Contents List.

Qty. Description Part Number

1 Resistor, 1K, 1W 101216

D. Mounting.

CAUTIONThe selection of the mounting location for the device, its controls and the routing of the wiring

is to be accomplished under the direction of the facilities and the safety engineer.

NOTEIntercoms supplied with flexible cords for connection to field wiring are not intended

for permanent mounting.

The intercom is intended to be mounted on any relatively flat and rigid surface by the twomounting ears on the exterior of the housing. Figure 9 is a dimensional outline drawingshowing the proper mounting configuration. The two mounting ears are 13/32" diameter holesspaced 5.68" apart. Hardware for mounting the intercom to the surface shall be provided by theinstaller.

WARNINGThis unit is heavy and should be mounted on a rigid surface capable of supporting the weight

of the intercom.

WARNINGFor shipboard applications, installations shall be in accordance with the United States Coast Guard,

Title 46 CRF, Parts 110-113.

For units using the noise cancelling hand-held microphone, install the supplied microphonemounting clip on any rigid surface near the intercom. Avoid locating the microphone where itmay be exposed to excessive moisture or dust.

E. Electrical Connections.

Plug each intercom into a nearby power source with a protective earth grounding. The plugshould remain readily accessible for disconnection. Connect the audio inputs in parallel.

Audio wires should be sized properly by your licensed installation electrician for yourspecified application.

Optional: A 1K, 1W resistor is included in a kit with each intercom. Installing the resistoracross the audio lines helps to reduce noise in certain environments. Only one resistor needs tobe installed on the lines for any system installation.

See figures 1 through 19 for typical intercom connections and wiring information.

-4-

F. Service.

1. General.

Federal Signal will service your equipment or provide technical assistance with anyproblems that cannot be handled locally.

Any units returned to Atkinson Dynamics for service, inspection, or repair must beaccompanied by a Return Material Authorization. This R.M.A can be obtained only from thefactory by calling (888)751-1500.

At this time a brief explanation of the service requested or the nature of the malfunction,should be given.

Address all communications and shipments to:

ATKINSON DYNAMICSService Department2645 Federal Signal DriveUniversity Park, IL 60466-3195

-5-

-6-

2. Replacement Parts.

WARNINGReplace fuse with GMC-1/2 only. DO NOT substitute.

Description Part NumberBelt switch assembly K137146BConnector, 3-Position (12/24V PC Boards) K140411A-03Cover plate gasket K8590013BFuse, GMC-1/2 K148A155AHeadset assembly K137145AKnob, volume control K141A129AMicrophone assembly K137144APC Board, 120VAC K2001875BPC Board, 120VAC, w/headset K2001875B-M34PC Board, 12V, AD-26 K2001878BPC Board, 12V, AD-26-7 K2001878B-06PC Board, 12V, AD-26-8 K2001896B-01PC Board, 12V, AD-26-8-M44 K2001896BPC Board, 12V, AD-26A K2001878B-05PC Board, 12V, AD-26C K2001878B-01PC Board, 12V, AD-26D K2001878B-02PC Board, 12V, AD-26SA-25 K2001878B-17PC Board, 240VAC K2001875B-01PC Board, 240VAC, w/headset K2001875B-01M34PC Board, 24V, AD-26SA-25 K2001878B-19PC Board, 24V, AD-56 K2001878B-07PC Board, 24V, AD-56-8 K2001896B-03PC Board, 24V, AD-56-8-M44 K2001896B-02PC Board, 24V, AD-56A K2001878B-12PC Board, 24V, AD-56C K2001878B-08PC Board, 24V, AD-56D K2001878B-09PC Board, 120VAC, -1 Models K2001885APC Board, 240VAC, -1 Models K2001885A-01Kit, potentiometer w/ on/off switch K8590236AKit, push button switch (12/24V models) K8590242AKit, push button switch (120/240V models) K8590241AResistor, 1K, 1W K101216ARubber boot, push button switch K288697ARubber boot, toggle switch K288696ARubber boot, volume control K288A542AKit, toggle switch, DPDT K8590238AKit, potentiometer, 10K Ohm K8590237AKit, toggle switch, 3PDT (AD-27A-M34 & AD-27A-4-M34 only) K122342AKit, toggle switch, 3PDT K8590239BKit, pushbutton switch, 3PDT K8590288AKit, potentiometer, 1K Ohm K8590289AVoice Coil/Diaphragm Assembly-Series C K8590181A

G. Warranty.

Atkinson Dynamics guarantees their intercoms to be free of defects at the time of delivery. Ifdamage is found to be a factory defect, Atkinson Dynamics will warrant all labor charges forrepair for one full year, and all replacement parts for two full years.

-7-

290A

3693

BLK

WH

T

BLK

WH

T

AU

DIO

LIN

ETO

OT

HE

R IN

TE

RC

OM

S1K 1W

ATT

AU

DIO

CA

BLE

RE

MO

TE

AR

EM

OT

E B

AU

DIO

CA

BLE

1 32

1 32 4

BLK

WH

TG

RN

*SE

E P

OW

ER

CO

NN

EC

TIO

NS

*B

LKW

HT

GR

N*

Rem

inde

rs:

•B

efor

e in

stal

ling

rem

ote

inte

rcom

s, p

reca

utio

ns s

houl

d be

take

n to

pre

vent

feed

back

betw

een

two

or m

ore

rem

otes

in c

lose

pro

xim

ity a

nd a

cous

tical

ly r

efle

ctiv

e ar

eas.

•16

–20

gaug

e lo

w v

olta

ge a

udio

cab

le. T

wis

ted

pair

not r

equi

red.

.•

Shi

elde

d au

dio

cabl

e no

t req

uire

d un

less

ope

ratin

g in

hig

h el

ectr

omag

netic

fiel

ds. G

roun

don

e en

d of

the

shie

ld to

ear

th g

roun

d.•

Type

of

pow

er c

able

dep

ends

on

inte

rcom

mod

el.

•7

foot

pro

vide

d fo

r au

dio

and

power

.

Ope

ratin

g P

rinci

ple:

•W

hen

one

talk

s, a

ll in

terc

oms

will

hea

r.

•To

talk

to o

ther

sta

tions

, pre

ss th

e ta

lk/

liste

n sw

itch

and

spea

k in

to th

e sp

eake

r/m

icro

phon

e.R

elea

se ta

lk s

witc

h to

list

en.

NO

TE

S:

1.S

peak

er/M

icro

phon

e2.

Off/

On/

Spe

aker

Vol

ume

Con

trol

3.Ta

lk/L

iste

n S

witc

h4.

“Cal

l” To

ne S

witc

h

Pow

erR

emot

e A

Rem

ote

B12

–18V

DC

AD

-26

AD

-26A

120V

50/

60H

zA

D-2

7A

D-2

7A22

-30V

DC

AD

-56

AD

-56A

240V

50/

60H

zA

D-5

7A

D-5

7A

PO

WE

R C

ON

NE

CT

ION

S:

BLK

+D

C P

ower

12/2

4V M

odel

sH

OT

120/

240V

Mod

els

WH

TC

omm

on12

/24V

Mod

els

Neu

tral

120/

240V

Mod

els

GR

NE

arth

Gro

und

120/

240V

Mod

els

only

1

BLK

WH

TG

RN

*

290A

3694

BLK

WH

T

BLK

WH

T

AU

DIO

CO

MM

ON

RE

MO

TE

AR

EM

OT

E B

TO O

TH

ER

RE

MO

TE

S

1K 1WAT

T

1 3

5

2

1 32 4

BLK

WH

TG

RN

*SE

E P

OW

ER

CO

NN

EC

TIO

NS

*

Ope

ratin

g P

rinci

ple:

•W

hen

one

talk

s, a

ll re

mot

es w

ill h

ear

.•

To ta

lk, p

ress

talk

sw

itch

and

spea

k in

to s

peak

er/

mic

roph

one.

Rel

ease

talk

sw

itch

to li

sten

.•

To ta

lk in

to h

and-

held

mic

roph

one,

pre

ss ta

lk s

witc

hon

mic

roph

one

and

spea

k in

to m

icro

phon

e el

emen

t.N

OT

ES

:1.

Spe

aker

/Mic

roph

one

2.O

ff/O

n/S

peak

er v

olum

e co

ntro

l3.

Talk

/Lis

ten

switc

h4.

“Cal

l” To

ne p

ush

butto

n sw

itch

5.#1

3714

4 ha

nd-h

eld,

noi

se c

ance

lling

mic

roph

one

with

pus

h-to

-tal

k sw

itch

Pow

erR

emot

e A

Rem

ote

B12

–18V

DC

AD

-26-

7A

D-2

6A-7

120V

50/

60H

zA

D-2

7-7

AD

-27A

-722

-30V

DC

AD

-56-

7A

D-5

6A-7

240V

50/

60H

zA

D-5

7-7

AD

-57A

-7

PO

WE

R C

ON

NE

CT

ION

S:

BLK

+D

C P

ower

12/2

4V M

odel

sH

OT

120/

240V

Mod

els

WH

TC

omm

on12

/24V

Mod

els

Neu

tral

120/

240V

Mod

els

GR

NE

arth

Gro

und

120/

240V

Mod

els

only

-8-

Rem

inde

rs:

•B

efor

e in

stal

ling

rem

ote

inte

rcom

s, p

reca

utio

ns s

houl

d be

take

n to

pre

vent

feed

back

bet

wee

ntw

o or

mor

e re

mot

es in

clo

se p

roxi

mity

and

aco

ustic

ally

ref

lect

ive

area

s.•

16–2

0 ga

uge

low

vol

tage

aud

io c

able

. Tw

iste

d pa

ir no

t req

uire

d.•

Shi

elde

d au

dio

cabl

e no

t req

uire

d un

less

ope

ratin

g in

hig

h el

ectr

omag

netic

fiel

ds. G

roun

d on

een

d of

the

shie

ld to

ear

th g

roun

d.•

Type

of

pow

er c

able

dep

ends

on

inte

rcom

mod

el.

•7

foot

(2

met

er)

cabl

e pr

ovide

d fo

r au

dio

and

power

.

2

290A

3695

GR

N

BLK

WH

T

GR

N

BLK

WH

T

1K 1WAT

T

AU

DIO

CO

MM

ON

(+)

DC

PO

WE

R

3/16

-20

AW

G

RE

MO

TE

AR

EM

OT

E B

1 32

1 32

BLK

WH

TG

RN

*SE

E P

OW

ER

CO

NN

EC

TIO

NS

*

Ope

ratin

g P

rinci

ple:

•W

hen

one

talk

s, th

e ot

her

stat

ions

will

hea

r.

•To

talk

into

the

inte

rcom

, pre

ss th

e ta

lk s

witc

han

d sp

eak

into

the

spea

ker/

mic

roph

one.

Rel

ease

to li

sten

.N

OT

ES

:1.

Spe

aker

/Mic

roph

one

2.O

ff/O

n/S

peak

er v

olum

e co

ntro

l3.

Talk

/Lis

ten

Sw

itch

Pow

erR

emot

e A

Rem

ote

BN

ot a

pplic

able

AD

-26-

112

0V 5

0/60

Hz

AD

-27-

124

0V 5

0/60

Hz

AD

-57-

1

PO

WE

R C

ON

NE

CT

ION

S:

BLK

+D

C P

ower

12/2

4V M

odel

sH

OT

120/

240V

Mod

els

WH

TC

omm

on12

/24V

Mod

els

Neu

tral

120/

240V

Mod

els

GR

NE

arth

Gro

und

120/

240V

Mod

els

only

3

-9-

GR

N

BLK

WH

T

GR

N 1

BLK

3

WH

T 2

GR

N 1

BLK

3

WH

T 2

AU

DIO

CO

MM

ON

CO

NT

RO

L

290A

3696

MA

ST

ER

"A

"M

AS

TE

R "

B"

SLA

VE

1 3

4 5

2

1

1

3

2

2

1K

1W

ATT

SE

E P

OW

ER

CO

NN

EC

TIO

NS

BLK

WH

TG

RN

* *B

LKW

HT

GR

N*

BLK

WH

TG

RN

*

Ope

ratin

g P

rinci

ple:

•M

aste

rs n

orm

ally

list

en to

sla

ve.

•S

lave

talk

s to

mas

ter

hand

s-fr

ee,

with

out h

avin

g to

pre

ss a

talk

sw

itch.

•W

hen

any

mas

ter

talk

s, s

lave

hea

rs.

Oth

er m

aste

rs w

ill h

ear

.•

To ta

lk in

to m

aste

r, p

ress

talk

sw

itch

and

spea

k in

to s

peak

er/m

icro

phon

e.R

elea

se ta

lk s

witc

h to

list

en.

•To

talk

into

han

d-he

ld m

icro

phon

e,pr

ess

talk

sw

itch

on m

icro

phon

e an

dsp

eak

into

mic

roph

one

elem

ent.

NO

TE

S:

1.S

peak

er/M

icro

phon

e2.

Off/

On/

Spe

aker

vol

ume

cont

rol

3.P

ress

-to-

talk

Sw

itch

4.#1

3714

4 ha

nd-h

eld,

noi

se c

ance

lling

mic

roph

one

5.3-

cond

ucto

r/16

–22

gaug

e ca

ble.

Use

shie

lded

cab

le in

ele

ctric

ally

noi

syar

eas.

Gro

und

one

end

of th

e sh

ield

to“e

arth

” gr

ound

. Gro

und

chas

sis

of D

Cun

it to

gro

und.

Bef

ore

inst

allin

g re

mot

e in

terc

oms,

pre

caut

ions

sho

uld

be ta

ken to

pre

vent

feed

back

betw

een

two

or m

ore

rem

otes

in c

lose

prox

imity

and

aco

ustic

ally

refle

ctiv

e ar

eas.

Pow

erM

aste

r AM

aste

r B

Sla

ve12

–18V

DC

AD

-26C

-7A

D-2

6CA

D-2

6D12

0V 5

0/60

Hz

AD

-27C

-7A

D-2

7CA

D-2

7D22

-30V

DC

AD

-56C

-7A

D-5

6CA

D-5

6D24

0V 5

0/60

Hz

AD

-57C

-7A

D-5

7CA

D-5

7D

PO

WE

R C

ON

NE

CT

ION

S:

BLK

+D

C P

ower

12/2

4V M

odel

sH

OT

120/

240V

Mod

els

WH

TC

omm

on12

/24V

Mod

els

Neu

tral

120/

240V

Mod

els

GR

NE

arth

Gro

und

120/

240V

Mod

els

only

4

-10-

290A

3702

BLK

WH

T

BLK

WH

T

AU

DIO

CO

MM

ON

RE

MO

TE

TO O

TH

ER

INT

ER

CO

MS

1 37

56

2 4 SE

E P

OW

ER

CO

NN

EC

TIO

NS

BLK

WH

TG

RN

* *B

LKW

HT

GR

N*

1K

1W

ATT

Ope

ratin

g P

rinci

ple:

•W

hen

one

talk

s, a

ll re

mot

es w

ill h

ear

.•

To ta

lk in

to r

emot

e, p

ress

talk

sw

itch

and

talk

into

spe

aker

/mic

roph

one.

Rel

ease

talk

sw

itch

to li

sten

. (T

he h

eads

et s

peak

er s

elec

tor

switc

hm

ust b

e in

“sp

eake

r” p

ositi

on to

hea

r re

ceiv

edau

dio

sign

al o

n sp

eak

er.)

•To

talk

into

hea

dset

, pre

ss b

elt “

talk

” sw

itch

and

talk

into

hea

dset

mic

roph

one.

Rel

ease

bel

tsw

itch

to li

sten

. (T

he s

elec

tor

switc

h m

ust b

ein

“he

adse

t” p

ositi

on.)

NO

TE

S:

1.S

peak

er/M

icro

phon

e2.

Off/

On/

Spe

aker

vol

ume

cont

rol

3.Ta

lk/L

iste

n sw

itch

4.H

eads

et/S

peak

er s

elec

tor

switc

h5.

“Cal

l” pu

sh b

utto

n sw

itch

6.#1

3714

6 B

elt s

witc

h w

/15

foot

cor

d7.

#137

145

Hea

dset

w/n

oise

can

celli

ngm

icro

phon

e

Bef

ore

inst

allin

g re

mot

e in

terc

oms,

pre

caut

ions

sho

uld

be ta

ken to

pre

vent

feed

back

betw

een

two

or m

ore

rem

otes

in c

lose

prox

imity

and

aco

ustic

ally

refle

ctiv

e ar

eas.

Pow

erR

emot

e A

12–1

8VD

CA

D-2

6A-M

3412

0V 5

0/60

Hz

AD

-27A

-M34

22-3

0VD

CA

D-5

6A-M

3424

0V 5

0/60

Hz

AD

-57A

-M34

PO

WE

R C

ON

NE

CT

ION

S:

BLK

+D

C P

ower

12/2

4V M

odel

sH

OT

120/

240V

Mod

els

WH

TC

omm

on12

/24V

Mod

els

Neu

tral

120/

240V

Mod

els

GR

NE

arth

Gro

und

120/

240V

Mod

els

only

5

-11-

BLK WHT

BLK 1 WHT 2

AUDIO

200 FT. MAX.

COMMON

290A3742B

MASTER

REMOTESLAVE

STATION

1

32

1

2

1K1WATT

SEE POWERCONNECTIONS

BLKWHTGRN

*

*

POWER CONNECTIONS:BLK +DC Power 12/24V Models

HOT 120/240V ModelsWHT Common 12/24V Models

Neutral 120/240V ModelsGRN Earth Ground 120/240V

Models only

NOTES1. Speaker/Microphone2. Off/On Speaker Volume Control3. Talk/Listen Switch4. Remote Slave Station

Model AD-SV-25

Operating Principle:1. Slave station is both a speaker and a microphone.2. Master is normally in “Listen” mode

until the talk button is pressed to talk to remote.3. Volume controls are for received signal volume only.

They do not control transmitted signals.

POWER MASTER12-18VDC AD-26-822-32VDC AD-56-8120V 50/60 Hz AD-27-8

6

-12-

BLK WHT

BLK 1 WHT 2

AUDIO

200 FT. MAX.

COMMON

290A3743B

MASTER

SPEAKER

1

32

5

4

SEE POWERCONNECTIONS

BLKWHTGRN

1K1WATT

*

*

NOTES:1. Speaker/Microphone2. Off/On/Speaker volume control3. Talk/Listen switch4. Outgoing Volume Control5. Speaker Model AD-SS-25 with swivel mounting

bracket or Speaker Model AD-SF-25 with holesin outer flange for flush mounting

Operating Principle:1. Slave station is both a speaker and a microphone.2. Master is normally in “Listen” mode until the talk button is pressed to talk to remote.3. Outgoing and incoming volumes are controlled by separate controls on master.

POWER CONNECTIONS:BLK +DC Power 12/24V Models

HOT 120/240V ModelsWHT Common 12/24V Models

Neutral 120/240V ModelsGRN Earth Ground 120/240V

Models only

POWER MASTER12-18VDC AD-26-8-M4422-32VDC AD-56-8-M44120V 50/60 Hz AD-27-8-M44240V 50/60 Hz AD-57-8-M44

7

-13-

GR

N

RE

D

WH

T

BLK

GR

N 1

RE

D 3

WH

T 4

BLK

2

GR

N 1

RE

D 3

WH

T 4

BLK

2

AU

DIO

+ D

C P

OW

ER

CO

MM

ON

CO

NT

RO

L

290A

3744

MA

ST

ER

"A

"M

AS

TE

R "

B"

SLA

VE

1 3

4 5

2

1

1

3

2

2

PO

WE

R

(+)

( -)

1K 1WAT

T

Ope

ratin

g P

rinci

ple:

1.M

aste

rs n

orm

ally

list

en to

slav

e.2.

Sla

ve ta

lks

to m

aste

rs“h

ands

-fre

e”, w

ithou

t hav

ing

topr

ess

a ta

lk s

witc

h.3.

Whe

n an

y m

aste

r ta

lks,

sla

vehe

ars.

Oth

er m

aste

r w

ill h

ear

.4.

To ta

lk in

to m

aste

r, p

ress

talk

switc

h an

d sp

eak

into

spe

aker

/m

icro

phon

e. R

elea

se ta

lksw

itch

to li

sten

.5.

To ta

lk in

to h

and-

held

mic

roph

one,

pre

ss ta

lk s

witc

hon

mic

roph

one

and

spea

k in

tom

icro

phon

e el

emen

t.

NO

TE

S:

1.S

peak

er/M

icro

phon

e2.

Off/

On/

Spe

aker

Vol

ume

Con

trol

3.P

ress

-to-

Talk

Sw

itch

4.#1

3714

4 H

and-

held

, noi

se-

canc

ellin

g m

icro

phon

e w

ithpu

sh-t

o-ta

lk s

witc

h

PO

WE

RM

AS

TE

R A

MA

ST

ER

BS

LAV

E12

-18V

DC

AD

-26C

-1-7

AD

-26C

-1A

D-2

6D-1

22-3

2VD

CA

D-5

6C-1

-7A

D-5

6C-1

AD

56D

-1

8

-14-

9

290A

4065

BLK

WH

T

BLK

GR

N

RE

D

WH

T

1K 1WA

TT

AU

DIO

CO

MM

ON

RE

MO

TE

AR

EM

OT

E B

1 32

BLK

WH

TG

RN

*SE

E P

OW

ER

CO

NN

EC

TIO

NS

TO

OT

HE

RIN

TE

RC

OM

S

*

1 3 4

2

BLK

WH

TG

RN

*

Ope

ratin

g P

rinci

ple:

•W

hen

one

talk

s, a

ll in

terc

oms

will

hea

r.

•To

talk

to o

ther

sta

tions

, pre

ss th

e ta

lk/li

sten

sw

itch

and

spea

kin

to th

e sp

eake

r/m

icro

phon

e. R

elea

se ta

lk s

witc

h to

list

en.

•To

use

ext

erna

l tal

k sw

itch,

clo

se s

witc

h an

d sp

eak

into

the

spea

ker/

mic

roph

one.

NO

TE

S:

1.S

peak

er/M

icro

phon

e2.

Off/

On/

Spe

aker

Vol

ume

Con

trol

3.Ta

lk/L

iste

n S

witc

h4.

Cus

tom

er-S

uppl

ied

Ext

erna

l Nor

mal

ly-O

pen

Tal

k/Li

sten

Sw

itch,

Mom

enta

ry (

e.g.

, foo

t sw

itch)

Pow

erR

emot

e A

Rem

ote

B

12-1

8VD

CA

D-2

6A

D-2

6-2

120V

50/

60H

zA

D-2

7A

D-2

7-2

22-3

0VD

CA

D-5

6A

D-5

6-2

240V

50/

60H

zA

D-5

7A

D-5

7-2

PO

WE

R C

ON

NE

CT

ION

S:

BLK

+D

C P

ower

12/2

4V M

odel

sH

OT

120/

240V

Mod

els

WH

TC

omm

on12

/24V

Mod

els

Neu

tral

120/

240V

Mod

els

GR

NE

arth

Gro

und

120/

240V

Mod

els

only

-15-

GR

N

WH

T

BLK

GR

N

WH

T

BLK

GR

N

WH

T

BLK

AU

DIO

CO

NT

RO

L

CO

MM

ON

290A

4066

MA

ST

ER

"A

"M

AS

TE

R "

B"

SLA

VE

3

4

2

1

3

2

2

1K

1W

AT

T

SE

E P

OW

ER

CO

NN

EC

TIO

NS

BLK

WH

TG

RN

**B

LKW

HT

GR

N*

BLK

WH

TG

RN

*

RE

D

BLU

1

PO

WE

R C

ON

NE

CT

ION

S:

BLK

+D

C P

ower

12/2

4V M

odel

sH

OT

120/

240V

Mod

els

WH

TC

omm

on12

/24V

Mod

els

Neu

tral

120/

240V

Mod

els

GR

NE

arth

Gro

und

120/

240V

Mod

els

only

Ope

ratin

g P

rinci

ple:

•M

aste

rs n

orm

ally

list

en to

sla

ve.

•S

lave

talk

s to

mas

ter

hand

s-fr

ee, w

ithou

t hav

ing

topr

ess

a ta

lk s

witc

h.•

Whe

n an

y m

aste

r ta

lks,

sla

ve h

ears

. O

ther

mas

ters

will

hea

r.•

To ta

lk in

to m

aste

r, pre

ss ta

lk s

witc

h an

d sp

eak

into

spea

ker/

mic

roph

one.

Rel

ease

talk

sw

itch

to li

sten

.•

Mas

ter

“A”

can

talk

by

pres

sing

eith

er th

e ta

lk s

witc

hor

ext

erna

l sw

itch

(cus

tom

er s

uppl

ied)

.

NO

TE

S:

1.S

peak

er/M

icro

phon

e2.

Off/

On/

Spe

aker

Vol

ume

Con

trol

3.P

ress

-To-

Talk

Sw

itch

4.C

usto

mer

-Sup

plie

d E

xter

nal N

orm

ally

-Ope

n P

ress

-To

-Tal

k S

witc

h, M

omen

tary

(e.

g., f

oot s

witc

h)

Pow

erM

aste

r A

Mas

ter

BS

lave

12-1

8VD

CA

D-2

6C-2

AD

-26C

AD

-26D

120V

50/

60H

zA

D-2

7C-2

AD

-27C

AD

-27D

22-3

0VD

CA

D-5

6C-2

AD

-56C

AD

-56D

240V

50/

60H

zA

D-5

7C-2

AD

-57C

AD

-57D10

-16-

11

-17-

PO

WE

R C

ON

NE

CT

ION

S:

BLK

+D

C P

OW

ER

12/2

4V M

odel

sH

OT

120/

240V

Mod

els

WH

TC

omm

on12

/24V

Mod

els

Neu

tral

120/

240V

Mod

els

GR

NE

arth

Gro

und

120/

240V

Mod

els

only

PO

WE

RR

EM

OT

E R

AR

EM

OT

E R

BR

EM

OT

E R

C12

VD

CA

D-2

6-6

AD

-26A

-6A

D-2

6T-6

120V

50/

60H

zA

D-2

7-6

AD

-27A

-6A

D-2

7T-6

240V

50/

60H

zA

D-5

7-6

AD

-57A

-6A

D-5

7T-6

** R

efer

to r

emot

e m

odel

num

ber

as a

n e

xam

ple

for

Mas

ter.

NO

TE

S:

1.D

esk

Set

spe

aker

(m

icro

phon

e is

mou

nted

on

hand

set)

2.D

esk

Set

spe

aker

vol

ume

cont

rol

3.H

ands

et e

arpi

ece

volu

me

cont

rol (

mou

nted

on

back

of c

ase)

4.S

peak

er/M

icro

phon

e5.

Off/

On/

Spe

aker

vol

ume

cont

rol

6.Ta

lk/L

iste

n sw

itch

7.“C

all”

Tone

Sw

itch

8.M

aste

r sw

itch

box

— c

usto

mer

sup

plie

d9.

DP

DT

sel

ecto

r (t

oggl

e) s

witc

h —

cus

tom

er s

uppl

ied

Ope

ratin

g P

rinci

ple:

1.M

aste

r ca

n se

lect

(vi

a m

aste

r sw

itch

box)

to ta

lk to

any

one

or

mor

e re

mot

es.

2.A

ny r

emot

e ca

n in

itiat

e a

call

to M

aste

r re

gard

less

of s

elec

tor

switc

h be

ing

onor

off.

Rem

ote

mus

t spe

cify

its

loca

tion.

Rem

otes

can

not t

alk

to o

ther

rem

otes

.3.

To ta

lk in

to in

terc

om, p

ress

talk

sw

itch

and

spea

k in

to s

peak

er/m

icro

phon

e.R

elea

se ta

lk s

witc

h to

list

en.

4.F

or M

aste

r to

talk

to r

emot

e, s

elec

t des

ired

rem

ote

via

sele

ctor

sw

itch,

pre

ssta

lk s

witc

h on

han

dset

mic

roph

one

and

talk

into

han

dset

mic

roph

one.

290A

4067

B

RE

MO

TE

RB

MA

ST

ER

DE

SK

SE

T

MA

ST

ER

WA

LL M

OU

NT

INT

ER

CO

M

4 5 7

SE

E P

OW

ER

CO

NN

EC

TIO

NS

BLK

WH

TG

RN

*

*

*

****

RE

MO

TE

RA

4

8

6

3

5

BLK

WH

TG

RN

BLK

WH

TG

RN

RE

MO

TE

RC

DE

SK

SE

T

BLK

WH

TG

RN

TO

OT

HE

R R

EM

OT

ES

4

65

BLK

WH

TG

RN

*

*

*

WH

T

GR

N

RE

D

BLK

BLK

RE

D

GR

N

WH

T

TALK

CO

M.

TALK

LIS

TE

N

LIS

TE

N C

OM

.

TALK

CO

M.

TALK

LIS

TE

N

LIS

TE

N C

OM

.

TALK

CO

M.

TALK

LIS

TE

N

LIS

TE

N C

OM

.

TALK

CO

M.

TALK

LIS

TE

N

LIS

TE

N C

OM

.

BLK

RE

D

GR

N

WH

T

BLK

RE

D

RC

RB

RA

GR

N

WH

T2

3

2

99

1

1

6

12

NOTES:1. Speaker/Microphone2. Off/On/Speaker volume control3. Outgoing Volume Control4. Speaker Model AD-SS-25 with swivel mounting

bracket or Speaker Model AD-SF-25 with holesin outer flange for flush mounting

5. PTT (press-to-talk) switch—customer supplied

OPERATING PRINCIPLE:1. Master station is both a speaker and a microphone.2. Master is normally in “Listen” mode until the PTT (press-to-talk) switch is pressed to

talk to slave.3. Outgoing and incoming volumes are controlled by separate controls on slave.4. Slave talks to master hands-free, without having to press a talk switch.

POWER CONNECTIONS:BLK +DC Power 12/24V ModelsWHT Common 12/24V Models

POWER SLAVE12-18VDC AD-26D-8-M44

GRN WHTRED BLK

GRN 1 WHT 2

AUDIO

CONTROL

200 FT. MAX.

COMMON

290A4068

SLAVE

MASTER SPEAKER

1

2

4

3

SEE POWERCONNECTIONS

BLKWHT

1K1WATT

*

*

5

MASTERSPEAKER

-18-

13O

pera

ting

Prin

cipl

e:•

Whe

n on

e ta

lks,

all

inte

rcom

s w

ill h

ear

.•

To ta

lk to

oth

er s

tatio

ns, p

ress

the

talk

/list

en s

witc

h an

dsp

eak

into

the

spea

ker/

mic

roph

one.

Rel

ease

talk

sw

itch

tolis

ten.

•P

ress

ing

the

call

butto

n on

rem

ote

A p

rovid

es a

con

tact

clos

ure

for

an a

ttent

ion-

getti

ng a

uxili

ary

sign

alin

g de

vice

,e.

g. a

str

obe

light

.

NO

TE

S:

1.S

peak

er/M

icro

phon

e2.

Off/

On/

Spe

aker

Vol

ume

Con

trol

3.Li

sten

/Tal

k S

witc

h4.

“Cal

l” S

witc

h5.

Cus

tom

er-S

uppl

ied

Aux

iliar

y S

igna

ling

De

vice

(e.

g., s

trob

elig

ht)

Pow

erR

emot

e A

Rem

ote

B

12-1

8VD

CA

D-2

6-3

AD

-26

120V

50/

60H

zA

D-2

7-3

AD

-27

22-3

0VD

CA

D-5

6-3

AD

-56

240V

50/

60H

zA

D-5

7-3

AD

-57

PO

WE

R C

ON

NE

CT

ION

S:

BLK

+D

C P

ower

12/2

4V M

odel

sH

OT

120/

240V

Mod

els

WH

TC

omm

on12

/24V

Mod

els

Neu

tral

120/

240V

Mod

els

GR

NE

arth

Gro

und

120/

240V

Mod

els

only

BLK

AU

DIO

CA

BLE

AU

DIO

CA

BLE

TO

OT

HE

RIN

TE

RC

OM

SA

UD

IOLI

NE

RE

D

WH

T

BLK

- P

OW

ER

+ P

OW

ER

WH

T

GR

N

290A

4069

RE

MO

TE

"A

"R

EM

OT

E "

B"

AU

XIL

LIA

RY

SIG

NA

LIN

G D

EV

ICE

1

5

3

2

1K

1W

AT

T

SE

E P

OW

ER

CO

NN

EC

TIO

NS

BLK

WH

TG

RN

* *B

LKW

HT

GR

N*

1 32 4

-19-

14

-20-

Ope

ratin

g P

rinci

ple:

•M

aste

r pr

esse

s ta

lk s

witc

h to

talk

to r

emot

e.•

Mas

ter

can

turn

mon

itor

switc

h on

and

hea

rev

eryt

hing

goi

ng o

n at

rem

ote.

•W

hen

mas

ter

mon

itor

switc

h is

of

f, re

mot

e m

ust

pres

s ta

lk s

witc

h to

talk

to m

aste

r.

•W

hen

mas

ter

mon

itor

switc

h is

on,

rem

ote

can

talk

to m

aste

r ha

nds-

free

with

out p

ress

ing

the

talk

switc

h.•

Mas

ter

supp

lies

pow

er to

rem

ote

unit.

NO

TE

S:

1.S

peak

er/M

icro

phon

e2.

Off/

On/

Spe

aker

Vol

ume

Con

trol

3.P

ress

-To-

Talk

Sw

itch

4.M

aste

r M

onito

r S

witc

h

Pow

erM

aste

rR

emot

eN

ot a

pplic

able

AD

-26-

1-2

120V

50/

60H

zA

D-2

7C-1

-M22

PO

WE

R C

ON

NE

CT

ION

S:

BLK

HO

T12

0/24

0V M

odel

sW

HT

Neu

tral

120/

240V

Mod

els

GR

NE

arth

Gro

und

120/

240V

Mod

els

GR

N

BLK

WH

T

GR

N

BLK

WH

T

AU

DIO

CO

MM

ON

CO

NT

RO

L

RE

DR

ED

(+)

PO

WE

R

290A

4070

MA

ST

ER

RE

MO

TE

1 32 4

1

3

2

1K

1W

AT

T

SE

E P

OW

ER

CO

NN

EC

TIO

NS

BLK

WH

TG

RN

* *

15

-21-

GR

N

BLK

WH

T

GR

N

BLK

WH

T

AU

DIO

CO

MM

ON

CO

NT

RO

L

290A

4071

MA

ST

ER

SLA

VE

1 32 4

1

3

2

1K

1W

AT

T

SE

E P

OW

ER

CO

NN

EC

TIO

NS

BLK

WH

TG

RN

* *B

LKW

HT

GR

N*

Ope

ratin

g P

rinci

ple:

•M

aste

r pr

esse

s ta

lk s

witc

h to

talk

to s

lave

.•

Mas

ter

can

turn

mon

itor

switc

h on

and

hea

rev

eryt

hing

goi

ng o

n at

sla

ve.

•W

hen

mas

ter

mon

itor

switc

h is

of

f, sl

ave

mus

tpr

ess

talk

sw

itch

to ta

lk to

mas

ter

.•

Whe

n m

aste

r m

onito

r sw

itch

is o

n, s

lave

can

talk

to m

aste

r ha

nds-

free

with

out p

ress

ing

the

talk

switc

h.

NO

TE

S:

1.S

peak

er/M

icro

phon

e2.

Off/

On/

Spe

aker

Vol

ume

Con

trol

3.P

ress

-To-

Talk

Sw

itch

4.M

onito

r O

n/O

ff S

witc

h

Pow

erM

aste

rS

lave

120V

50/

60H

zA

D-2

7C-M

22A

D-2

7-2W

3

PO

WE

R C

ON

NE

CT

ION

S:

BLK

HO

T12

0/24

0V M

odel

sW

HT

Neu

tral

120/

240V

Mod

els

GR

NE

arth

Gro

und

120/

240V

Mod

els

16

-22-

GR

N

RE

D

WH

T

BLK

GR

N

RE

D

WH

T

BLK

GR

N

RE

D

WH

T

BLK

AU

DIO

+ D

C P

OW

ER

CO

MM

ON

CO

NT

RO

L

290A

4072

MA

ST

ER

"A

"S

LAV

EM

AS

TE

R "

B"

3

3

2 4 8

4

1

77

2

211

DC

PO

WE

R

(+)

(-)

1K 1WA

TT

5

6

4

RE

DB

LKG

RN

WH

T

SP

KR

HE

AD

SE

TS

PK

RH

EA

DS

ET

SP

KR

HE

AD

SE

T

Ope

ratin

g P

rinci

ple:

•M

aste

rs n

orm

ally

list

en (

mon

itor)

slave

.•

Sla

ve c

an ta

lk to

mas

ter

hand

s-fr

ee w

ithou

tha

ving

to p

ress

a ta

lk s

witc

h.•

Whe

n on

e st

atio

n ta

lks,

oth

er s

tatio

ns w

illhe

ar.

•To

talk

to o

ther

sta

tions

, mas

ter

mus

t pre

ss a

talk

sw

itch

on in

terc

om o

r on

bel

t sw

itch.

•M

aste

r an

d sl

ave

can

sele

ct to

talk

/list

en o

nei

ther

the

spea

ker/

mic

roph

one

or h

eads

et v

iase

lect

or s

witc

h.

NO

TE

S:

1.S

peak

er/M

icro

phon

e2.

Off/

On/

Spe

aker

Vol

ume

Con

trol

3.P

ress

-To-

Talk

Sw

itch

4.H

eads

et/S

peak

er S

elec

tor

Sw

itch

5.#1

3714

5 H

eads

et w

/noi

se-c

ance

ling

mic

roph

one

6.#1

3714

6 B

elt s

witc

h w

/15

ft. c

ord

7.R

ecep

tacl

e fo

r he

adse

t8.

12 ft

. cor

d fo

r re

mot

e cu

stom

er-sup

plie

dhe

adse

t rec

epta

cle

Pow

erM

aste

r A

Mas

ter

BS

lave

12-1

8VD

CA

D-2

6C-1

-M80

AD

-26C

-1-M

34A

D-2

6D-1

-M34

PO

WE

R C

ON

NE

CT

ION

S:

RE

D+

DC

Pow

er12

/24V

Mod

els

WH

TC

omm

on12

/24V

Mod

els

17

-23-

GR

N

RE

D

WH

T

BLK

GR

N

WH

TOB

SE

RV

E C

OLO

R C

OD

E

GR

N

RE

D

WH

T

BLK

AU

DIO

+ D

C P

OW

ER

CO

MM

ON

CO

NT

RO

L

AU

DIO

+ D

C P

OW

ER

CO

MM

ON

CO

NT

RO

L

290A

4073

MA

ST

ER

"A

"M

AS

TE

R "

B"

SLA

VE

3

5

2

1

3

2

2

PO

WE

R

(+)

(-)

1K

1WA

TT

1

4

RE

D

BR

N

OR

YE

L

* BLU

(

+ D

C P

OW

ER

FR

OM

MA

ST

ER

"B

")*

BLK

(

CO

NT

RO

L F

RO

M M

AS

TE

R "

B")

*

Ope

ratin

g P

rinci

ple:

•M

aste

r no

rmal

ly li

sten

s to

sla

ve.

•S

lave

talk

s to

mas

ter

hand

s-fr

ee, w

ithou

tha

ving

to p

ress

a ta

lk s

witc

h.•

Whe

n an

y m

aste

r pr

esse

s ta

lk s

witc

h, s

lave

hear

s. O

ther

mas

ter

will

als

o he

ar.

•To

talk

into

mas

ter,

pre

ss ta

lk s

witc

h an

dsp

eak

into

spe

aker

/mic

roph

one.

Rel

ease

talk

sw

itch

to li

sten

.•

Mas

ter

B c

an ta

lk b

y pr

essi

ng e

ither

the

talk

switc

h or

ext

erna

l sw

itch

(cus

tom

ersu

pplie

d).

NO

TE

S:

1.S

peak

er/M

icro

phon

e2.

Off/

On/

Spe

aker

Vol

ume

Con

trol

3.P

ress

-To-

Talk

Sw

itch

4.E

xter

nal P

ress

-To-

Talk

Sw

itch,

Mom

enta

ry(e

.g.,

foot

sw

itch)

5.4-

cond

ucto

r/16

-22

gaug

e ca

ble.

Use

shie

lded

cab

le in

ele

ctric

ally

noi

sy a

reas

.G

roun

d on

e en

d of

the

shie

ld to

“ea

rth”

grou

nd.

Gro

und

chas

sis

of D

C u

nits

togr

ound

.

Pow

erM

aste

r A

Mas

ter

BS

lave

12-1

8VD

CA

D-2

6C-1

AD

-26C

-1-2

AD

-26D

-122

-30V

DC

AD

-56C

-1A

D-5

6C-1

-2A

D-5

6D-1

PO

WE

R C

ON

NE

CT

ION

S:

BLK

+D

C P

ower

12/2

4V M

odel

sW

HT

Com

mon

12/2

4V M

odel

s

18

-24-

Ope

ratin

g P

rinci

ple:

•M

aste

r ca

n se

lect

to m

onito

r an

y on

e or

mor

e re

mot

es v

iam

aste

r sw

itch

box.

•To

talk

to r

emot

e(s)

, mas

ter

clos

es d

esire

d se

lect

or s

witc

h,pr

esse

s ta

lk s

witc

h, a

nd s

peak

s in

to th

e sp

eake

r/m

icro

phon

e.M

aste

r re

leas

es ta

lk s

witc

h to

list

en.

•S

elec

ted

rem

ote(

s) ta

lk to

mas

ter

“han

ds-f

ree”

with

out h

avin

gto

pre

ss r

emot

e ta

lk s

witc

h.•

Rem

otes

can

not t

alk

to o

ther

rem

otes

.•

Rem

otes

not

sel

ecte

d by

mas

ter

cann

ot ta

lk h

ands

-fre

e an

dm

ust p

ress

talk

sw

itch

to in

itiat

e ca

ll to

mas

ter

.•

Whe

n in

itiat

ing

a ca

ll to

mas

ter

, rem

ote

mus

t spe

cify

its

loca

tion

for

mas

ter

to r

espo

nd.

NO

TE

S:

1.S

peak

er/M

icro

phon

e2.

Off/

On/

Spe

aker

Vol

ume

Con

trol

3.Ta

lk/L

iste

n S

witc

h4.

Mas

ter

Sel

ecto

r S

witc

h (c

usto

mer

sup

plie

d)5.

Dou

ble-

Pol

e (O

FF

-ON

) Tog

gle

Sel

ecto

r S

witc

h

Pow

erM

aste

rR

emot

es12

0V 5

0/60

Hz

AD

-27C

-1A

D-2

7D-M

49

PO

WE

R C

ON

NE

CT

ION

S:

BLK

HO

T12

0/24

0V M

odel

sW

HT

Neu

tral

120/

240V

Mod

els

GR

NE

arth

Gro

und

120/

240V

Mod

els

290A

4074

RE

MO

TE

"B

"

MA

ST

ER

SE

E P

OW

ER

CO

NN

EC

TIO

NS

MA

ST

ER

SE

LEC

TO

R S

WIT

CH

BO

X

TO

RE

MO

TE

RB

*

RE

MO

TE

"A

"

1

4

2

BLK

WH

TG

RN

TO

OT

HE

R R

EM

OT

ES

1

32

BLK

WH

TG

RN

**

BLK

WH

TG

RN

*

BLK

RE

D

GR

N

WH

T

BLK

RE

D

GR

N

WH

T

BLK

RE

D

GR

N

WH

T

BLK

RE

D

RC

RB

RA

GR

N

WH

T

5

3

1 23

19W

IRIN

G R

EF

ER

EN

CE

CH

AR

TA

UD

IO C

AB

LEP

OW

ER

CA

BLE

MO

DE

L N

O.

BLA

CK

WH

ITE

GR

EE

NR

ED

BLA

CK

WH

ITE

GR

EE

NA

D-2

6-1-

M34

+D

C P

OW

ER

CO

MM

ON

AU

DIO

N/A

*N

/A*

N/A

*N

/A*

AD

-26C

-M34

CO

NT

RO

LC

OM

MO

NA

UD

ION

/A*

12-1

8 V

DC

CO

MM

ON

N/A

*A

D-2

6C-7

-M82

CO

NT

RO

LC

OM

MO

NA

UD

ION

/A*

12-1

8 V

DC

CO

MM

ON

N/A

*A

D-2

6D-1

-M82

+D

C P

OW

ER

CO

MM

ON

AU

DIO

CO

NT

RO

LN

/A*

N/A

*N

/A*

AD

-26D

-1-M

84+

DC

PO

WE

RC

OM

MO

NA

UD

IOC

ON

TR

OL

N/A

*N

/A*

N/A

*A

D-2

6SA

-25

AU

DIO

CO

MM

ON

N/A

*N

/A*

12-1

8 V

DC

CO

MM

ON

N/A

*A

D-2

7-M

34A

UD

IOC

OM

MO

NN

/A*

N/A

*12

0V 5

0/60

Hz

NE

UT

RA

LE

AR

TH

GN

DA

D-2

7-M

82A

UD

IOC

OM

MO

NN

/A*

N/A

*12

0V 5

0/60

Hz

NE

UT

RA

LE

AR

TH

GN

DA

D-2

7-M

83A

UD

IOC

OM

MO

NN

/A*

N/A

*12

0V 5

0/60

Hz

NE

UT

RA

LE

AR

TH

GN

DA

D-2

7A-4

-M34

AU

DIO

CO

MM

ON

N/A

*N

/A*

120V

50/

60 H

zN

EU

TR

AL

EA

RT

H G

ND

AD

-27A

-7-M

83A

UD

IOC

OM

MO

NN

/A*

N/A

*12

0V 5

0/60

Hz

NE

UT

RA

LE

AR

TH

GN

DA

D-2

7C-1

(-4)

+D

C P

OW

ER

CO

MM

ON

AU

DIO

CO

NT

RO

L12

0V 5

0/60

Hz

NE

UT

RA

LE

AR

TH

GN

DA

D-2

7C-1

-7(-

4)+

DC

PO

WE

RC

OM

MO

NA

UD

IOC

ON

TR

OL

120V

50/

60 H

zN

EU

TR

AL

EA

RT

H G

ND

AD

-27C

-M34

CO

NT

RO

LC

OM

MO

NA

UD

ION

/A*

120V

50/

60 H

zN

EU

TR

AL

EA

RT

H G

ND

AD

-27D

-1+

DC

PO

WE

RC

OM

MO

NA

UD

IOC

ON

TR

OL

120V

50/

60 H

zN

EU

TR

AL

EA

RT

H G

ND

AD

-27S

A-2

5A

UD

IOC

OM

MO

NN

/A*

N/A

*12

0V 5

0/60

Hz

NE

UT

RA

LE

AR

TH

GN

DA

D-5

6C-M

34C

ON

TR

OL

CO

MM

ON

AU

DIO

N/A

*22

-30

VD

CC

OM

MO

NN

/A*

AD

-56C

-7-M

82 C

ON

TR

OL

CO

MM

ON

AU

DIO

N/A

*22

-30

VD

CC

OM

MO

NN

/A*

AD

-56S

A-2

5A

UD

IOC

OM

MO

NN

/A*

N/A

*22

-30

VD

CC

OM

MO

NN

/A*

AD

-57-

M83

AU

DIO

CO

MM

ON

N/A

*N

/A*

240V

50/

60 H

zN

EU

TR

AL

EA

RT

H G

ND

AD

-57A

-1(-

4)+

DC

PO

WE

RC

OM

MO

NA

UD

ION

/A*

240V

50/

60 H

zN

EU

TR

AL

EA

RT

H G

ND

AD

-57A

-7-M

83A

UD

IOC

OM

MO

NN

/A*

N/A

*24

0V 5

0/60

Hz

NE

UT

RA

LE

AR

TH

GN

DA

D-5

7C-M

34C

ON

TR

OL

CO

MM

ON

AU

DIO

N/A

*24

0V 5

0/60

Hz

NE

UT

RA

LE

AR

TH

GN

DA

D-5

7SA

-25

AU

DIO

CO

MM

ON

N/A

*N

/A*

240V

50/

60 H

zN

EU

TR

AL

EA

RT

H G

ND

N/A

*: N

ot A

pplic

able

-25-

3.88 5.68

5.00 6.50

4.84

9.88

290A3697

.412 HOLES∅

20

-26-

2561494HREV. H Printed 11/06Printed in U.S.A.