2. Baldwin Boxall
  3. M2000I

Baldwin Boxall M2000I Operating instructions

  • Hello! I'm here to assist you with the Baldwin Boxall M2000I Talkback system. I've reviewed the operating instructions, which detail how to use the simplex intercom for two-way communication between a central point and up to 16 remote help points. The document also explains the system's features like zone selection, call detection, and the use of a chime for incoming calls, as well as providing connection details for various Mitre amplifiers. How can I help you today?
  • How many remote emergency help points can the system support?
    What type of microphone is used for the all call facility?
    How is the amplifier power rating calculated?
    How is conversation initiated from a remote station?
    How is the conversation terminated?
Baldwin Boxall Communications Ltd.
Wealden Industrial Estate, Farningham Road
Crowborough, East Sussex, TN6 2JR
Telephone: 01892 664422 Fax: 01892 663146
Website: www.baldwinboxall.co.uk
Email: mail@baldwinboxall.co.uk
IM2000I
Issue 2 05/05/2000
ECR 972
M2000I - Talkback
Operating Instructions
- 2 - Issue 2
Mitre M2000I - Talkback
Talkback offers simplex intercom facilities and uses a loudspeaker for two-way communication (as a speaker
and microphone) between a central point and up to 16* remote emergency help points.
Facilities
1. Remote zone selection for 16 remote points
2. Speech direction control
3. Remote call detection (latching until call accepted) and LED driven
4. Receive signal balanced input preamp with limiter and adjustable frequency response to compensate for
remote loudspeaker response
5. Incoming call operates a chime mounted in external amplifier
6. Maximum audio output power 1KW or 1 zone 500W
7. 24V DC power obtained from external amplifier
8. All call facility using BDM216I microphone
Overview
The Talkback system comprises of four main components – the M2000I system controller, a mixer amplifier, a
central control microphone and up to 16* emergency help points, consisting of any 100V line loudspeaker and
call switch arrangement, although suitable selection should be considered for each application. For example a
horn speaker is reasonably weather proof and also operates as an efficient microphone. Any push-to-make
switch can be utilised at the help point depending on the location and specific requirements. This, when
pushed, will trigger the amplifier’s chime generator, which is then reproduced through the control point
loudspeaker.
The amplifier power rating is calculated in the same way as a standard PA system. Simply add the power of
each loudspeaker on the system together and round up to the next amplifier model. If further call points are
added in the future, care must be taken to ensure the amplifier has enough power. This assumes that all of the
help points may be called simultaneously and therefore requiring the maximum power at one time.
* - Up to a maximum of 16 emergency help points per M2000I
Fig. 1 – BDM216I,
Control console
SPEAK
SPEAK
NOW
ALL
BUSY
Remote Selected
Press to talk,
release to listen.
All Call
Remote Selected
Incoming Call
C O M M U N I C A T I O N S
- 3 - Issue 2
The Talkback system controller can be used with any 100V line mixer amplifier with at least three inputs, a
chime generator, input priority switching and a 24V DC supply.
We recommend our Mitre range of amplifiers, as the unit aesthetics are the same as the Talkback controller so
that the rack looks correct. These instructions also provide connection details for use with the M30 and any
Mitre 2000 amplifier.
The help points can be cabled using either 2, 3 or 4-core cable. The Talkback system controller has an option
for each help point to allow different points to be cabled in different ways. We recommend a quality, screened
cable for the loudspeaker lines as low level signals are returned in the listen mode and this cuts down hum and
interference noise.
Each help point has an internal setting for the wiring and cable used. This is shown in Fig. 2 below. Move the
jumper connector to the positions indicated.
Fig. 2 – Remote Point cabling and Internal Settings
L/S
0V
L/S
CALL
CALL
L/S
0V
L/S
CALL
CALL
100
L/S
0V
L/S
CALL
CALL
2 WIRE
3 WIRE
4 WIRE
2. 2uF capacitor
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
Internal Setting
- 4 - Issue 2
To operate at a remote station
1. Press the call switch and wait for the central control point to answer. The switch will access the chime
generator in the amplifier and will reproduce through the control loudspeaker.
2. When an answer is received, you are free to talk with the control point, using the loudspeaker as a
microphone (to transmit) and speaker (to receive).
3. The conversation is terminated at the central control point.
To operate at the central control point
1. To reply to a conversation request from a remote station, press the relevant zone/help point button. This
will be indicated on the bottom LED for that particular help point. See Fig 1. Once the relevant button is
selected, you will hear the remote point through the monitor loudspeaker.
2. Use the SPEAK key to speak to the selected help point/s. During the announcement the speech volume
indicator will fluctuate. Try to keep the indication constant without the yellow segment illuminating.
Maintaining a constant level will aid intelligibility.
3. Release the SPEAK key to listen to one help point through the central loudspeaker.
4. Repeat steps 2 and 3 until the conversation is complete.
5. Press the selected help point/s to terminate the conversation.
To operate at the central control point
1. To announce to all zones/help points press the ALL key. Whilst holding the key make the announcement.
During the announcement the speech volume indicator will fluctuate. Try to keep the indication constant
without the yellow segment illuminating. Maintaining a constant level will aid intelligibility.
2. Release the ALL key when the announcement is complete.
In the following connection diagrams, the ‘Transmit’ level is always the central control microphone input level.
The ‘Receive’ level is always the input level back from the help point/s (when in listen mode).
Low Voltage D irective
73/23/EEC asam ended
by 93/68/EEC
EM C Directive
89/336/EEC as am ended
by 92/31/EEC and 93/68/EEC
Applies onlywhenthe item s
arecorrectlyfitted and operated
inorwithproductsofour
manufactureandareinstalled
inarecom m ended enclosure.
- 5 - Issue 2
AC MAINS INPUT
AC MAINS FUSE
WARNING
DANGER
220-240V AC 50/60Hz
HIGH VOLTAGE
100V
0V50V
DANGER
HIGH VOLTAGE
THIS EQUIPMENT
MUST BE EARTHED.
DISCONNECT SUPPLY BEFORE
INTERNAL SERVICING.
50V
LOUDSPEAKER
100V
OUTPUT
M2120 = T3.15A 250V - 300VA MAX
M2060 = T2A 250V - 150VA MAX
CHIME
VOLUME
ALARM
VOLUME
INPUT0V
ACCESS
BUSY
+24V
BUSY
+24V
BAL
I/P
MANUFACTURED IN THE UK BY
BALDWIN BOXALLCOMMUNICATIONS LTD.
CROWBOROUGH, E.SUSSEX.TN6 2JR
TEL 01892 664422FAX 01892 663146
BALANCED
AM/FM AERIAL
1
2
34
5
6
123456
ON
1234
ON
L
R
AM
FM
ACCESS
0V
CHIMEPHANTOM
POWER
0.6mV MIC
V REST/BUSY
PRIORITY
PRE MASTER V/C
POST MASTER V/C
12
3 NOTE CHIME
1
23
0V
BAL
I/P
INPUT1
INPUT2
INPUT3
INPUT4
80mV
LINE
+24V DC O/P FUSE
SELF RESETTABLE
SUPPLY PRESENTINPUT
AUX
0VALARM
FLOATING
LINE O/PACC
+24V
0V
VOL REST RELAY
5A 100V MAX
2A MAX
AUX
MUTE
RLY COIL
0dBM
EN1461
POWER AMP I/P
CHIMEVOLUME
ALARMVOLUME
+24V
0V
L
R
2A MAX
LOUDSPEAKER
50V
100V123456
123456
123456
123456
15
1234
1
2
3
4
5
OUTPUT
SET DIL SWITCHES AS SHOWN
0V
ACCESS
BUSY
+24V
MANUFACTURED IN THE UK BY
BALDWIN BOXALLCOMMUNICATIONS LTD.
CROWBOROUGH, E.SUSSEX.TN6 2JR
TEL 01892 664422FAX 01892 663146
BALANCED
0V
ACCESS
BUSY
+24V
BALANCED
LISTEN
100V LINE
0V
CALL
L/S
EN1546
0VCALLOUTPUT
OUTPUT
ZONE 16ZONE 15ZONE 14ZONE 13ZONE 12ZONE 11ZONE 10ZONE 9ZONE 8ZONE 7ZONE 6ZONE 5ZONE 4ZONE 3ZONE 2ZONE 1
PIN1
PIN2
PIN3
PIN4
PIN5
PIN6
PIN7
PIN8
PIN9
PIN10
PIN11
PIN12
PIN13
PIN14
PIN15
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
ZONE1
ZONE2
ZONE3
ZONE4
ZONE5
ZONE6
ZONE7
ZONE8
ZONE9
ZONE10
ZONE11
ZONE12
ZONE13
ZONE14
ZONE15
ZONE16
PIN24
CALL-SELECT PIN CONNECTIONS
M2000I POWER INTERCOM
BDM MICROPHONE INPUT
CALL ZONE1 TO ZONE16MIC SIGNAL-SELECT ZONE1 TO ZONE16
F
U
S
E
PUSH
CENTRAL
CONTROL
POINT
M2000I
M2060MTRANSMIT I/P
CHIME I/PRECEIVE I/P
OR
EQUIVALENT
FIG. 3 - TALKBACK SYSTEM CONNECTIONS WITH M2000 AMPLIFIER
- 6 - Issue 2
L
E
N
F
U
S
E
PUSH
MODEL M30
630mA(T)Low Impedance
220/240V AC
50/60 Hz
76VA MAX
DANGER! HIGH VOLTAGE. DISCONNECT SUPPLY BEFORE ATTEMPTING INTERNAL SERVICE
THIS APPARATUS
MUST BE EATHED
WARNING !
100V
DANGER !
HIGH VOLTAGE
0V
Loudspeaker Output
50V
Line
3
61
2
5
4
500mV output
post master
and tone controls
Signal ground
500mV output
and tone controls
outputs.
Switch to 0V
when active
+24V output
* Speak now indicator
* Open collector
* Busy indicator
Sub
socketNo User
Control
1A(F)
+24V Output
Alarm Input
3
4
5
Aux
Signal
80mV 47K
n/c
n/c
30W
5
pre master
CENTRAL
CONTROL
POINT
C O M M U N I C A T I O N S
SPEAK
SPEAK
NOW
ALL
BUSY
M2000I
MANUFACTURED IN THE UK BY
BALDWIN BOXALLCOMMUNICATIONS LTD.
CROWBOROUGH, E.SUSSEX.TN6 2JR
TEL 01892 664422FAX 01892 663146
LISTEN
100V LINE
0V
CALL
L/S
EN1546ZONE 16ZONE 15ZONE 14ZONE 13ZONE 12ZONE 11ZONE 10ZONE 9ZONE 8ZONE 7ZONE 6ZONE 5ZONE 4ZONE 3ZONE 2
PIN1
PIN2
PIN3
PIN4
PIN5
PIN6
PIN7
PIN8
PIN9
PIN10
PIN11
PIN12
PIN13
PIN14
PIN15
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
ZONE1
ZONE2
ZONE3
ZONE4
ZONE5
ZONE6
ZONE7
ZONE8
ZONE9
ZONE10
ZONE11
ZONE12
ZONE13
ZONE14
ZONE15
ZONE16
PIN24
CALL-SELECT PIN CONNECTIONS
M2000I POWER INTERCOM
FIG. 4 - TALKBACK SYSTEM CONNECTIONS WITH M30 AMPLIFIER
1
2
3
4
ON
1
2
3
3
4
5
2
1
mic
0.6mV at 600
Ohms Balanced
Access switch
only required
for inputs 1&2
2
1
Signal Gnd
n/cSignal
Ground
4
2 X 33K
0V
ACCESS
BUSY
+24V
BALANCED
0VACCESS
BUSY
+24V
BALANCED0VCALLOUTPUT
OUTPUT
ZONE 1
BDM MICROPHONE INPUT
CALL ZONE1 TO ZONE16MIC SIGNAL-SELECT ZONE1 TO ZONE16
M30
TRANSMIT I/P
CHIME I/P
RECEIVE I/P
SETTINGS M30
DIL SWITCH
- 7 - Issue 2
0V
ACCESS
BUSY
+24V
BALANCED
0V
ACCESS
BUSY
+24V
BALANCED0VCALLOUTPUT
OUTPUT
ZONE 4ZONE 3ZONE 2ZONE 1
PIN1
PIN2
PIN3
PIN4
PIN5
PIN6
PIN7
PIN8
PIN9
PIN10
PIN11
PIN12
PIN13
PIN14
PIN15
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
ZONE1
ZONE2
ZONE3
ZONE4
ZONE5
ZONE6
ZONE7
ZONE8
ZONE9
ZONE10
ZONE11
ZONE12
ZONE13
ZONE14
ZONE15
ZONE16
PIN24
CALL-SELECT PIN CONNECTIONS
BDM MICROPHONE INPUT
CALL ZONE1 TO ZONE16MIC SIGNAL-SELECT ZONE1 TO ZONE16
NORMALLY CLOSED
NORMALLY OPEN
LINE ZONE 8
LINE ZONE 7
SWITCHED
RL9
5A 2P/CO
RL8
5A 2P/CO
D221N4002
D231N4002
D241N4002
+24V
DIV
GROUP 1
GROUP 2
8
7
6
5
4
ZONE
SELECT
D201N4002
D211N4002
RL6
5A 2P/CO
RL7
5A 2P/CO
D191N4002
RL8
5A 2P/CO
GREY
RL7
5A 2P/CO
RL6
5A 2P/CO
MAUVE
BLUE
RL5
5A 2P/CO
D131N4002
D161N4002
D141N4002
D151N4002
D171N4002
D181N4002
3
J4
2
1
J1
J2
J3
D111N4002
D121N4002
RL3
5A 2P/CO
RL4
5A 2P/CO
D101N4002
GREEN
YELLOW
RL4
5A 2P/CO
RL5
5A 2P/CO
LINE ZONE 6
LINE ZONE 5
LINE ZONE 4
LINE ZONE 3
ORANGE
RL2
5A 2P/CO
RL3
5A 2P/CO
RED
RL2
5A 2P/CO
D71N4002
D51N4002
D81N4002
D91N4002
D21N4002
D31N4002
D61N4002
RL1
5A 2P/CO
D11N4002
D41N4002
RL1
5A 2P/CO
BROWN
LINE ZONE 2
LINE ZONE 1
RL9
5A 2P/CO
D251N4002
ZONE1
ZONE2
ZONE3
ZONE4
ZONE5
ZONE14
ZONE15
ZONE6
ZONE7
ZONE8
ZONE9
ZONE10
ZONE11
ZONE16
+24V
ZONE12
ZONE13
COMMON
CONTACTS
CAMERA
SELECT
CONTACTS
1 TO 8
PIN 20
PIN 8
PIN 7
PIN 6
PIN 5
PIN 4
PIN 3
PIN 2
PIN 1
CAMERA
SELECT
CONTACTS
+VE. PIN 20
ZONE1, PIN1
ZONE2. PIN2
ZONAL
SELECT
SIMPLIFIED SCHEMATIC
B81R
13
25
12
24
11
23
10
22
9
21
8
20
7
19
6
18
5
17
4
16
3
15
2
14
1
FIG5 - CAMERA CONNECTIONS TO
THE M2000I INTERCOM
/