NORTHERN ELECTRIC CM Series User manual

N.E.-C

. ·

739

MANUAL

'

MAY

1958

CONTENTS .

SECTION 1

·DESCRIPTION

& SPECIFICATIONS

SECTION 2 • IN.

ST

ALLA

TION & OP E_

RA

TION ·

.SECTION 3 • ACCESSORIES

SECTION 4

·APPLICATION

NOTES

SEC110N ·s

·SERVICE

INFORMATION

SECTION 6 -

www.telephonecollectors.info ©Jeff Lamb

N.E.•C.

705

WARRANTY

N.

orthern

Electric

Company

Limited

warrants

this

equipment

to

be

free

~rom

defec~s

in

material

and

•

workmanship

under

normal

use

and

service,

its

obligation

under

this

warranty

being

limited

to

shipp-

ing

a

replacement

for

any

numbered

part

or

parts

thereof,

except

vacuum

tubes,

which

.

shall

within

ninety

(90)

days

from

the

date

of

purchase

of

such

equipment

by

the

original

retail

purchaser

be

re-

turned

to

Northern

through

its

distributor

or

dealer

with

tr

ans

port

at

ion

charges

prepaid,

and

which

-examination

shall

disclose

to

Northern's

satisfaction

to

have

been

thus

defective,

such

replacement

will

be

shipped

charges

collect;

this

warranty

being

ex-

pressly

.

in

lieu

of

all

other

warranties

expressed

or

implied,

and

Northern

neither

assumes

nor

author-

izes

any

representative

or

other

person

to

assume

for

it

any

other

liability

in

connection

with

the

sale

of

_its·

products.

·

This

w'

arranty

shall

not

apply

to

any

equipment

\yhich

shall

have

been

repaired

or

altered

in

any

way

so

as,

in

Northern's

opinion,

to

affect

its

stability

or

re-

liability,

nor

to

any

equipment

which

has

been

sub-

jected

to

misuse

,

neglect

or

accident,

nor

to

any

equipment

which

has

had

the

serial

number

altered;

effaced

or

removed.

"Northern

Electric

r

..

ser~es

the

right, without

notice,

to make

such

changes

in equipment,

design,

or

component.,

as

progress

in

e·

ngineering

or

manufacturing

methods

may

warrant."

Northern

Electric

COMPANY

LIMITED

BELLEVILLE,

ONTARIO

.

ASSOCIATED

DISTRIBUTORS:

CANADA-

DOMINION

SOUND

EQUIPMENTS

LIMITED,

4040

ST

. CATHERINE

ST.

WEST,

MONTREAL

u.s.A

.-ALTEC

LANSING

CORPORATION,

1Sl5

s.

MANCHESTER

AVENUE

,

ANAHEIM,

CALIFORNIA

FOREIGN

(EXCEPT

U.S

.

A.)-

WESTREX

CORPORATION

,

111

EIGHTH AVENUE,

NEW

YORK

11

,

U.S.A.

www.telephonecollectors.info ©Jef Lamb

N . E . •

C.

•

741

DESCRIPTION:

Northern

Electric

CM

MAGNAPHONE

PART

II

lss

.

1-5

/58

SECTION 1·

PAGE I

The

Complete Master Magnaphone

is

an economical and

efficient

loudspeaker

intercom

sys-

tem which

provides

intercommunication

facilities

fo

r

industries

,

offices,

institutions

and

homes.

The

cabinets,

suitably

styled

for

office

and home

use

as

well

as

industrial

applicat

i

ons,

are

built

to

withstand

years

of

rugged

use

and

yet

retain

their

original

appearance

.

All Master System

(6

stations

maximum)

FEATUR·ING: * Remote Answering.

*

Busy

Signal.

* Individual Volume Control.

* Confidential

Handset

.

*

loud

Paging

.

CM-SA

BUSY

S

IGNAL

INDICATOR

PRESs-TO

·

TAL

K

RELEASE

·

TO·LISTEN

SWITCH

SPECIFlCATIONS:

Impedance, Input and

Output:

STATION

SELECTOR

SWITCH

45

ohms.

OFF

·

ON

SWITCH

PILOT

LAMP

CMA-SA

BUSY

SIGNAL

INDICATOR

PRESs-TO·TALK

RELEASE

·

TO·LISTE

N

SWITCH

STATION

SELECTOR

SWITCH

POWER

CORD

\

117v

.

AC

/

De

0.

25

Amp

s.

Frequency

Response

:

Specially

adjusted

for maximum

intellegibility

of

voice

trans

-

mission

.

Gain:

Power Supply :

Vacuum

Tubes

:

NOTE :

Colour:

Dimensions :

Weight : CM-

SA;

CMA-SA;

80

db nominal.

117

volts

AC/

DC

at 0.

25

amps.

1- 12AX7

(voltage

Amp

Iifier)

1-

35W4

(Rectifier)

1-50C5

{Output Amplifier)

As

the

loud

speakers

are

disconnected

when

the

selector

swit-

ches

are

in

standby

position,

the

residval

noise

is

zero.

Rosy

Beige

.

7•

1/

2"

wide x 6 •

1/

8"

high x

5-

1/2"

deep.

4

lbs

.

net;

6

lbs.

shipping.

5

lbs

.

net;

7

lbs

.

shipping

.

www.telephonecollectors.info ©Jef Lamb

PART

II

SECTION I

lss.

1-

5/

58

PAGE 2

N

.E

.

-C

,-

74 2

Northern

Electric

CM MAGNAPHONE

BLANK

PAGE

www.telephonecollectors.info ©Jef Lamb

N.E.-C

.

-743

INSTALLATION:

Northern

Electric

CM MAGNAPHONE

PART

II

lss.

l -5/ 58

SECTION 2

PAGE I

The

two

following

basic

systems

are

presented

to

illustrate

the

installation

of

a

Complete

Master

System.

Both

systems

use

the

same

basic

units,

without

modification,

and

a

choice

of

either

system

will

be

dependant

upon

requirements

and

,

building

arrangement.

The

number

of

stations

used

in a

system

will

depend

on

the

number

of

locations

desiring

intercommunication

and

may

vary

from a minimum

of

two

to

a maximum

of

six.

Although

a CMA- SA

Master

Station

(amplifier

unit)

may

be

placed

at

any

point

from A

to

F

in

either

system,

it

is

suggested

it

be

located

in a

position

where

its

operator

will

be

in

control

of

the

system

and

turn

the

unit

on

and

off

at

the

beginn

ing

and

ending

of

each

day

. It

is

also

recommended

that

it

be

located

near

an

AC

outlet

.

CAUTION -FOR SYSTEMS "A"

(,

"B":

h

is

essential

that

twisted

pairs

be

used

for

station

interconnection.

Each

twisted

pair

should

be

connected

to

a

pair

of

odd

and

even

numbered

terminals,

e.g.

one

pair

for

terminals

l

and

2,

another

pair

for 3

and

4,

another

pair

for 5

and

6

etc

.

Individual

conductors

in

each

twisted

pair

must

not

be

cross

connected.

That

is,

odd

numbered

terminals

are

connected

with

one

conductor

of

a

twisted

pair

and

even

numbered

terminals

are

connected

with

the

other

con-

ductor

of

that

same

twisted

pair

.

SYSTEM

"A"

:

The

"A"

System

illustrates

the

"in-

line"

or

direct

wiring

method

of

installation.

A

multi-

conductor

cable

runs

through

al

I

station

locations

as

shown

in

the

fol

lowing

block

diagram

.

STATION

A

CMA-5A

STATION

B

CM-5A

SYSTEM

A -

BLOCK

DIAGRAM

STATION

c

CM-5A

STATION

D

CM-5A

STATION

E

CM

-

5A

STATION

F

CM

-

5A

www.telephonecollectors.info

©Jef Lamb

~I

....

'"

..

TYPICAL INTERSTATION

WIRING

II

r-1

r----1

r:-i

r-1

IN

"-1

(?

? ? ? ? ?

"\

I

OUT I

I~

I

l~I

I

':::::::

t I

':::::::

I I

':::::::

I I

"="

I

- - - - -

t<xJt

- - - - -

t<xJt

- - - - -

i-\Vt

- - - - -

~I

SEE NOTE 2 ,-.....

,-.....

SEE NOTE 2

2

3

4

5

REM c @

@

SPARE

STATION .

A

TERMINALS

STATION

B

TERMINALS

STATION

c

TERMINALS

STATION

D

TERMINALS

NOTE.

1.

For

ease

of

representation,

station

terminal

boards

hove

been

illustrated

as

shown

in

the

Typical

lnterstotion

Wiring

diagram.

2.

lnterstotion

wires

to

terminals

S

and

6

ore

required

on

the

initial

installation

only

when

a

busy

signal

tron,former

kit

hos

been

installed

in

a

system

.

See

CAUTION nol:e under insl:allal:ion.

- - -

@

STATION

E

TERMINALS

(/)

-I

@

STATION

F

TERMINALS

(/)

~

I -ON0<>1041>0UIOOIO(OO

,.,

-

,.,

llJJ

~

g

-1

I

....

oa>oioooo=o;\;o~o

-I

:a

,.,

,., c

:a

;::

~

I

t;iO:j;OUiOOiO::;jO(ijO~O

I

Ill

"1J

I !"

)>

;;o

....

-i

I

VI

.....

~

.....

CX>

I I

iJ

(/")

)>

m

II

fri

g

11

..,,

0

z

..,,

n

~~

g

~~

>~

Gl

~

~~

,,

~

:c

g.

~

~·

m

www.telephonecollectors.info ©Jef Lamb

N.E.•C.•745

SYSTEM

"B"

:

Northern

Electric

CM

MAGNAPHONE

PART

II

.SECTION 2

lss.

1·5

/58 . PAGE 3

System

"B"

illustrat

es

the

centralized

or junction box wiring method

of

installation

where

all

wires

from

outlying

stations

connect

to

appropriate

terminals

in a junction box.

Suitable

strapping

provides

the

necessary

through

connections

to

other

stations

.

STATION

B

0 0

20

21

0

18

/ 0

SYSTEM B - BLOCK

DIAGRAM

STATION

F

CM-5A

STATION

E

CM-SA

STATION

A

CMA-5A

BO

X

STATION

D

CM-SA

STATION

B

CM-SA

STATION

c

CM-SA

TYPICAL

INTERSTATION

WIRING

Station

A:

The numbered

terminals

of

stat

ion A

connect

to

the

cor·

responding numbered termi

nals

of

row A on

the

junction box.

17

0

( / /

Station

B:

The

numbered

terminals

of

station

B

connect

to

the

cor·

responding numbered

terminals

of

row B on

the

junction box.

'(

I

, 1

11

, 1

11

I

16

0

15

0

14

0

13

Stations

C,D,E,

F:

Similarly connected

as

for

stations

A and B.

AMP

IN

r\

JUNCTION

BOX

AMP

BUSY

OUT

SIG

STN A

r\

STN A 0 0 0 0 0 0 0 0 0 0 0 0

I 2 3 4 5 6 7 8 9

10

11

12

STN B

f)

f:}

I

'--~-++++----------!-----"

4 / 5 / 6

'----++++-++-------

--

-4-

--

-----'

/ /

LL---

===========

======

==-::...~

_/

~=S=E=E=N=O=T=E=2==========::t:==========================:::::::._/

NOTE·: 1.

Terminals

on junction box

are

not number

ed

consecutively

.

2.

lnterstation

wires

to

terminals

5 and 6 are required on

the

initial

installation

only

when a

busy

signal

transformer

kit

has

been

installed

in a

system.

SEE

CAUTION NOTE UNDER INSTALLATION.

www.telephonecollectors.info

PART.

II

lss.

1·5

/58

AMP

IN

r---\

STN

AO 0

SECTION 2

PAGE4

AMP

BUSY

OUT

SIG

;--\.

I\

0 0 0 0

'

Nortnern

Electric

CM

MAGNAPMONE

CM

SERIES

JUNCTION BOX

CALLING

CIRCUITS

TO

STN

A I

STN

B

STN

C

STN

D

STN

E

STN

FI

;--\.

I\

;--\.

I\

0 0 0 0 0 0 0 0 0 0 0 0 0

I 2 3 4 5 6 7 8 9

10

II

12 13

14

15

16

17

18

l9

REM

POS"'I

STN

e O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

I 2 3 4 5 6 9

10

7 8

II

12

13

14

15

16 17

18

20

STN

CO

0 0 0 a 0 0 0 0 0 0 0 0 0 0 0 0 0 0

I 2 3 4 5 6 9

10

II

12

7 8

13

14

15 16 17 18 19

REM

POS

12

STN

o0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

I 2 3 4 5 6 9

10

II

12 13

14

7 8

15

16 17

18

20

STN

EO

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

I 2 3 4 5 6 9

10

II

12 13

14

15

16

7 8

17

18 19

REM

POS

"3

STN

F0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

I 2 3 4 5 6 9

10

.

II

12

13 14

15

16 17

18

7 8

20

OPERATING TABLE

When

installation

has

been made

in

accordance

with system

"A

..

or

"B

..

wiring diagrams,

the

various

station

selector

switch

posit

i

ons

will be

in

accordance

with

the

following operating

table

.

This

table

applies

to

both, Systems A and

B.

OPERATING TABLE

STATION

#(

#2

A ® ©

B © ©

c © ®

D © @

E © @

F

~

®

SW

ITCH

PO

SITION

• 3

....

,

® ©

@ ©

© ©

© @

© ®

'

""

!'ii

®

0

©

0

" 1 0

STANDBY

STN SELECTOR SWITCH

Example : Station A

calls

station

D by turning h

is

selector

switch

to

position

3.

MASTER

GAIN

CONTROL :

A

sc

r

ew-driver

adjusted

type

gain

control, which

is

accessible

through a knockout

at

the

rear of

the

CMA-SA Master Station,

is

provided for adjusting

the

system

level.

INTERSTATION CABLE :

A good grade

of

interphone

type

cable,

utilizing colour coded and

twisted

pair wires,

is

re-

commended.

The

length

of

cable

between

stat

i

ons

will determine.

the

wire

size

and

the

following

chart

can

be used for

this

purpose.

Wire

Gauge

22

19

18

16

Recommended

Maximum

Di

stance

Between

Stations

{Busy signal current limi

tation)

500

ft.

1000

ft.

1100

ft.

2000

·

ft

~

N,

E,

• C , •

74

6

Northern

Electric

CM

MAGNAPHONE

PART

II SECTION 2

lss.

1• 5/ 58 PAGE 5

OPERATION -

ALL

STATIONS:

CM-SA

CMA-SA

BUSY

SIGNAL

PRESS

Tll

TALK

SELECT

STATION

ON-OFF

PILOT

BUSY

SIGNAL

PRESS

TD

TALK

SELECT

STATION

INDICATOR

RELEASE

TD

LISTEN

SWITCH

LAMP

INDICATOR

RELEASE

TD

LISTEN

TO

CALL

ANOTHER STATION:

1.

Select

the

station

to

be

called

by

turning

the

station

selector

switch

to

the

desired

position.

2.

Depress

"Press-To

-

Talk"

switch

to

talk·

release

to

listen

.

3.

On

completion

of

conversation,

restore

the

station

selector

switch

to

the

"Standby"

position.

TO

ANSWER

AN

INCOMING

CALL :

1.

When

incoming

call

is

heard,

depress

"Press-To-Talk"

switch

to

talk

-

release

to

listen.

NOTE:

When

answering

an

incoming

call,

it

is

not

necessary

to move

the

station

selector

switch

off

the

"Standby"

position.

EXTRA

DESIGNATION

STRIPS

N.E.•

C.·

747

PART

II

SECTION 2

lss.

1-5

/

58

PAGE 6

N . E .

-C.•748

Nort/Jern

Electric

CM

MAGNAPHON,E

BLANK

PAGE

NORTHERN ELECTRIC CM Series User manual

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