Bogen 15, 15-2, 15T-1, 15-3 User Manual
BOGEN
A DIVISION OF LEAR SIEGLER, INC.
MCT-1
MODELS
15-1,
SERIES 15
15T-1,15-2,15-3
DESCRIPTION
The
Bogen
Series 15-1 Centralized School Sound
System is designed to serve up to 50 rooms. It incorporates one Model MCT-1 Control Center and either one
or two Model SBS-25 Switchbanks, and is housed in a
desk-top consolette. The Series
15T-
1 accommodates up
to 25 rooms and includes one Control Center, one
Switchbank and one Model TP-160B AM/FM Tuner
housed in a desk-top consolette. The Series 15-2 consists
of one Control Center, one or two Switchbanks, one
AM/FM Tuner and one BSR 3-speed record changer. It
is housed in a desk-top, dual consolette and serves up to
50 rooms. The Series 15-3 consists of one Control
Center, one or two Switchbanks, one AM/FM Tuner
and one 3-speed record changer. It can accommodate up
to 50 rooms and is operated from a sturdy free-standing
console.
Each system has one 35-watt program channel and an
independent 4-watt intercom channel. The program
channel has two low-impedance microphone inputs
which can be used balanced or unbalanced. It also has
inputs for radio, phono and tape program sources and a
fader control to select either radio or phono-tape. The
selected program may be used alone or may be mixed
with the microphone program.
The MCT-1 control panel has a loudspeaker which
serves as both a program monitor speaker and an intercom transmitter/receiver. By means of the intercom
channel, the operator may hold a two-way conversation
with occupants of any room without disturbing the program being transmitted to other rooms. If desired, the
intercom channel also may be used to permit the operator to monitor any selected room through its room
speaker.
Model 15-2
In addition to the control panel, each Series 15
consolette or console has one or two switchbanks containing the individual room selector switches. In the standard system, these are 3-position lever switches used to
connect each room speaker to either the program (A)
channel or the intercom (C) channel, or to disconnect
the speaker from the system (Systems with optional
light-annunciator call circuit have four-position lever
switches). The units have an Emergency mode of operation which overrides these selector switches. When
operating in Emergency, the operator can transmit from
the control panel speaker to all room speakers, regardless of the settings of the room selector switches or of
other program inputs to the speakers. The Emergency
function operates whether the power switch is on or off.
INSTALLATION
UNPACKING
Inspect the shipping container and unit for indications of improper handling. The unit was carefully
checked before leaving the factory. If the unit has been
damaged, make an
immediate
claim to the dealer or distributor from whom it was purchased. If the unit was
shipped to you, notify the transport company without
delay and place your claim.
Printed in USA
8005
CENTRALIZED SCHOOL SOUND SYSTEM
54-5665-04
LOCATION OF
CONSOLE/CONSOLETTE
Where possible locate the console centrally, relative
to the rooms being served, in order to minimize the
length of speaker cables. The rear of the unit must
remain accessible for maintenance and for changing input and output connections. It is advisable that the unit
be oriented in such a manner that the operator, program
director and other interested parties are able to observe
the controls at all times. Provide adequate lighting and
ventilation. Do not locate the unit close to heat sources,
such as radiators and warm-air ducts, or against a wall
which prevents proper ventilation.
The Series 15-1 and
15T-1
consolettes are 21¼” (54
cm.) wide x 16” (40.6 cm.) high x 16” deep. The Series
15-2 consolette is 40½” (102.9 cm.) wide x 16” high x
16” deep. The Series 15-3 console is 22” (55.9 cm.) wide
x 46” (116.8 cm.) high x 31” (78.7 cm.) deep.
POWER
Connect the 3-wire cord with ground to a
105-125V,
50/60
Hz source. Make certain that the ground terminal
of the power receptacle connects to earth ground.
Two 50W AC power receptacles are provided on the
rear panel for a tuner, automatic record changer or auxiliary equipment. Line voltage is applied to these components when the consolette or console power switch is
on. Plug AC line cords into appropriate receptacle.
INPUT CONNECTIONS
MICROPHONE INPUTS. Two terminal strips on
the rear of the MCT-1 provide for two low impedance
balanced or unbalanced microphone inputs.
Twoconductor shielded microphone cable should be used
(Bogen #l008
or equivalent). Connect shield to terminal
1.
TUNER/PHONO-TAPE INPUTS. Two jacks accept
single-conductor shielded cable.
TAPE RECORDER/BOOSTER AMP INPUT. Ac-
cepts a two-conductor shielded cable
(Bogen
BB 8450 or
equivalent).
INTERCOM CALL-IN LINE. Connect parallel lines
from station call-in switches with 2-conductor shielded
cable. Connect shield to terminal 3.
SWITCHBANK
CONNECTION. Eleven-pin plug
connects three shielded pairs plus annunciator wire
from a switchbank. Also accommodates three lines for
optional telephone system.
TIME CLOCK INPUT. Terminal strip connects a
single-circuit time clock, closing contacts to activate the
optional Model SST-l Module.
GENERAL WIRING
RUNNING CABLES
WIRES. Class II wiring may be used for all audio and
annunciator lines. Make certain to properly support
cables to prevent sagging or strain. Keep wires clear of
objects which would subject them to heat, friction, or
other abuse.
Use No. 20 AWG shielded pairs with insulated outer
jacket (Bogen BB-8450, or equivalent) for speaker lines.
Annunciator lines require a third wire, which usually is
No. 22 AWG insulated wire with red insulation (Belden
8937, or equivalent). The number and types of wires
running from each room to the consolette and running
inside the classroom depend upon the type of speaker
operation required. Consult Table I for the wires required in your particular system.
TABLE I. CABLE RUNNING CHART FOR SERIES 15
Wires from Room to Consolette
Wires From Room Switch
to Room Speaker
Type of Classroom Switch or Device
Shielded Pair
No. 22 AWG
Used with Speaker
Shielded Pair
(Jacketed)
Single
Conductor
(Jacketed)
Refer to
(Bogen
BB-8450)
Figure
(Belden
8937)
(Bogen BB-8450)
None (Speaker Only)
1
0
0
Call (Model
CA-l0)
1
1 1
Call/Privacy (Model CA-l 1)
1
1 1
Voice Call-In, Non-Private
2* 0
1
2, 7
(Model CA13)
*Alternate method:
Run
two cables from room nearest consolette and one cable from each remaining room. Run
one cable in a loop or branch circuit connecting all room switches.
-2-
OUTLET BOXES. Where flush-mounting switches
are used, single-gang outlet boxes will be installed. In
installing such boxes, make certain to place them in a
location that permits personnel to operate the switch
while communicating via the room speaker. The normal
height (above the finished floor) for room switches is
approximately four feet, while speakers are normally
placed at a height of about seven and one-half feet.
SOLDERING INSTRUCTIONS
SOLDER.
Do not use acid-core solder or acid paste.
Make all solder connections with standard
60/40 resincore radio solder. Do not apply excessive heat. Soldering irons or guns from 75 to 200 watts will provide
ample capacity.
GROUNDS.
Do not connect cable shields to earth
ground or to convenient metal objects.
It
is important to
connect cable shields only as shown in the wiring
diagrams.
CLASSROOM WIRING
CONNECTIONS
Refer to the left-hand column of Table I for the type
of classroom operation used in your system. The corresponding right-hand column calls out the wiring diagram
required. Solder the wires as shown in the proper diagram and wrap with insulating tape.
CAUTION
Make certain to connect
all
wires in accordance with the color codes given on the diagram.
SECURING SWITCHES
The Model CA switches are designed for flush
mounting in a standard single-gang electrical outlet box,
BOGEN
25-VOLT
ROOM
LINE MATCHING
SPEAKER TRANSFORMER
(SEE NOTE-P)
(SEE NOTE-I)
--
I
--
22AWG MIN.(TYP.)
(BELDEN 8937, OR
EOUIV.)
TO CONSOLE ‘SWITCH BANK
BOGEN 25-VOLT
ROOM
LINE MATCHING
SPEAKER TRANSFORMER
(SEE
NOTE-2)
TO CONSOLE
SWITCH BANK
NOTES :
I- CONNECT AS FOR NON-PRIVATE OPERATION, AS FOR NON-PRIVATE WITH ANNUNCIATOR,
OR AS
FOR PRIVATE WITH ANNUNCIATOR.
2-
MODEL
TS-2A (1/2
WATT TAP) SHOWN.
SEE TEXT FOR
TS-I6A
TRANSFORMER
AND ADDITIONAL INFORMATION.
Figure 1 - Connection Diagram,
Speaker
Installation
-3-
74-2588-A
LINE
Figure 2 - Room Speakers with Voice Call-In Switch, Connection Diagram
or for surface mounting in a standard deep single-gang
wire mold outlet box. Install the box in a location which
provides convenient access to both the switch and the
room speaker.
LINEMATCHING TRANSFORMERS
The installation diagrams show
Bogen
line-matching
transformers of
¼
or %-watt capacity (Models TS-025
or TS-05). Other recommended transformers are shown
in figure 3. The console output is designed for a
25-volt
constant voltage distribution system and all system
loudspeakers must be provided with line-matching
transformers.
CAUTION
Speakers and transformers must be properly matched with respect to power
require-
men ts.
CONSOLETTE WIRING
Remove the Phillips-head screws securing the
louvered pane1 on the rear of the consolette (or console).
There are three rows of solder terminals across the rear
of each switchbank. Each selector switch corresponds
to the three terminals directly behind it, one terminal
from each row.
White tabs are provided for identifying the room controlled by each selector switch. Insert the tabs in the
slots provided in the transparent switch knobs. When
rooms are identified by number, it is common practice
to start numbering the switches from left to right (viewing from the front or operator position), starting with
the top switchbank.
SWITCHBANK WIRING
Wire the switchbanks as shown in figure 4. If annunciator lamps are used (Model SBL), always solder the
single annunciator wire to the top solder terminal. For
all switch banks, solder the speaker lines to the center
and bottom terminals, with the shield to the ground bus
bar.
This is the only place where speaker shields should
be grounded.
VOICE CALL-IN OPTION
Figure 2 shows the room connections and switch required for installing an optional voice call-in system.
The wiring must be completed by connecting the
shielded pair from the switch to the terminal strip on the
rear of the MCT-1 chassis. The polarity of the inner
conductors is not critical, but make certain to connect
the cable shield to the shield of the cable already con-
nected to the terminal strip.
Note that only one cable goes to the terminal strip.
Usually, the cables from all room switches are con-
nected by a common control cable and one cable is run
to the consolette. If this type of installation is not practical, then the control cables for two or more switches
are run to the consolette. In this case, connect all the
cables in parallel in a junction box at the consolette and
run a single control cable from the junction box to the
terminal strip on the MCT-1 chassis.
CALL/PRIVACY OPTION
Figure lc shows the room connections and switch
re-
quired for installing an optional annunciator/privacy
function in the intercom system.
4-
CONTROL FUNCTIONS
All operating controls for the Series 15 Centralized
School Sound Systems are located on the front of the
consolettes (consoles). The Series
15T-1
is equipped
with an AM/FM radio tuner, while the Series 15-2 and
15-3 have both a tuner and an automatic record changer. The operating controls for the tuner and record
changer are described in their individual instruction
manuals.
MCT-1 CONTROL PANEL
The controls on the Model MCT-1 Control Panel are:
POWER ON-OFF SWITCH. Turns the system on and
off.
FUNCTION SELECTOR SWITCHES. These switches
determine the mode of system operation. These operating modes are:
1.
Microphone. Connects microphone input to program
channel (selected by MIC level control).
2.
Program. Permits transmission of program material
as determined by program distribution and program
output switches.
3.
Intercom. Enables and disables TALK/LISTEN
switch.
4. Emergency. Permits operator to transmit to all stations via panel speaker, regardless of switchbank settings. Overrides all program and intercom functions.
Operates with power switch On or Off.
5.
Talk/Listen. Allows operator to communicate with
room(s) selected on switchbank without affecting program distribution to remaining rooms. Enabled by Intercom switch; depress to talk, release to listen.
CONSOLE SWITCH BANK
TYPE SBL SWITCH
SHIELDED PAIR
(BOGEN
BB-8450, OR EOUIV.)
NOTES
I-TERMINALS CORRESPOND TO SWITCH ON OPPOSITE
SIDE OF FRONT PANEL.
2-DRESS SPEAKER LEADS TO PREVENT SHORTING
LOWER TERMINALS TO GROUND BUS.
Figure 4 - Consolette Switch Bank, Connection
Diagram
LEVEL CONTROL SWITCHES
1.
Microphone. Fader control sets level of Mic 1 or Mic
2 program as indicated on output meter. May be used
with Program level control for mixing.
25
VOLTS
TS-2A
8
RED
SEC
TS
TS -
16A
OHMS
ONDARY
8
OHMS
SECONDARY
l/8 W
RED
l/4
w
BLK/YEL
l/2
w
YEL
I w
YEL
2
W
-
TS-
16A
POWER
TAP
2
w
4
w
8 w
16
W
CENTER
TAP
WHT
ORN
ORN
Figure 3 -Bogen Line-Matching Transformers
-5-
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