PRO SERIES
USER MANUAL
FOR THE
PS 630
SIX CHANNEL SPEAKER STATION
CONTENTS
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . .
UNPACKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FRONT PANEL CONTROLS AND CONNECTOR . . .
SIDE PANEL CONNECTORS . . . . . . . . . . . . . . . . . . . .
INTERNAL CONTROLS . . . . . . . . . . . . . . . . . . . . . . . .
CABLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PARTY LINE, TECHNICAL CONCEPT . . . . . . . . . . . .
GUARANTEE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TECHNICAL SPECIFICATIONS . . . . . . . . . . . . . . . . . .
User Manual PS 630 / Issue 1 © 1999 ASL Intercom, Utrecht, Holland.
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User Manual PS 630 / Issue 1 © 1994 ASL Intercom, Utrecht, Holland.
1.0
GENERAL DESCRIPTION
The PS 630 is a six channel speaker station designed
for use in both portable and fixed intercom systems.
It incorporates a loudspeaker and a gooseneck
microphone and provides full duplex communications
within an ASL intercom system. The PS 630 RM model
has a small built-in electret microphone.
Each channel has a Volume (listen level) control, a
Talk and Call button with LED indicators, channel
on/off switch and a two-stage sidetone trimmer. A
master volume controls the total speaker/headset
volume.
The unit is equiped with a limiter for the gooseneck
microphone, allowing the user to speak close into the
microphone without giving rise to overload and
distortion. Loudspeaker dimming is automatic when
the microphone is active. Private conversation may be
carried out via the headset connector with a headset
or telephone handset. When a headset is connected,
both gooseneck microphone and speaker are disabled
automatically.
As an option, a XLR-6 headset connector can be fitted
for binaural use of the headset. By setting internally
mounted jumpers, each of the 6 channels can be
assigned to either the left or the right headset can, or
to both headset cans.
Special attention has been paid to the intelligibility of
speech. By applying low noise/high speed opamps, a
speech presence filter and a specially developed high
power bridged headphone amplifier, communication is
very comfortable even in environments with high background noise level. There is a separate amplifier for
the loudspeaker.
The unique ASL CALL system provides both a flashing
red LED and a very distinctive and characteristic
sound signal. Smooth operation is guaranteed with the
CALL button. Only a slight touch makes the red LED
flash, whilst holding the button for two seconds will
activate the CALL sound signal. The volume of the
sound signal (buzzer) can be adjusted at the front
panel.
The preamplified microphone signal is electronically
balanced available at a 3 pin male XLR. This signal can
be sent to paging systems.
Fully electronic switching increases reliability and
allows for :
- 'soft' microphone ON switching, latched or
momentary
- remote Mic Mute facility.
- automatic speaker attenuation (adjustable), when
the microphone is activated.
An electronically balanced input allows volume
controlled monitoring of an audio signal. This is for
local use only, it will not appear on the intercomlines.
2.0
UNPACKING
The shipping carton contains the parts listed below:
* The PS 630
* User manual
* 19" rackmount flares
After unpacking the unit please inspect for any
physical damage to the unit, and retain the shipping
carton and relevant packing materials for use should
the unit need returning.
If any are missing, contact your dealer.
If any damage has occured, please notify your dealer
immediately so that a written claim can be initiated.
Please also refer to the guarantee section of this
manual.
ASL has taken great care to ensure this product
reaches you in flawless condition.
3.0
INSTALLATION
This PS 630 will form part of an existing or new
intercom system, and connection to it is
straightforward. There are no separate power
connections or batteries to install, as the necessary
DC voltages are derived from the intercom master
station or power supply, via the intercom connection
cable.
To connect the PS 630 onto the intercom system, use
professional flexible microphone cable with 2 wires
User Manual PS 630 / Issue 1 © 1994 ASL Intercom, Utrecht, Holland.
and 1 shield only. Connect the system intercom cables
into the LINE connector sockets on the rear panel.
Finally, when private conversation is desired, connect
the listening headset plug into the HEADSET
connector on the front panel.
The PS 630 is fully protected against mis wiring
(reverse power) or short circuit in the interconnect
cables.
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A special kit is included for mounting the PS 630 in a
19" rack, taking 2U of rackspace.
4.0
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FRONT PANEL CONTROLS & CONNECTOR
LISTEN LEVEL control knobs
These knobs preset the listen level for each
channel separately.
continue to flash for further 2 seconds.
4
TALK buttons
These buttons allow you to talk to each channel
separately or simultaneously.
Any Talk button activates the gooseneck or
headset microphone, the large green LED at each
channel indicates if the microphone is switched on
to that channel.
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PGM VOLUME
This knob adjusts the volume of the PGM input.
Depending in the setting of the internal jumpers the
PGM volume is also controlled by the master
volume
knob.
Latched switching:
When a TALK button is pressed quickly, the
microphone will be switched on, and is electronically latched. When pressed again, the microphone
will be switched off.
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When the microphone is latched on, it can be
muted by a mic mute from a PRO Series master
station or power supply.
4
CALL buttons
These push buttons activate the call system, for
each channel separately.
A momentary push will send a call signal to all
stations connected to the intercom channel and the
call LEDS will start flashing.
Press and hold the button for 2 seconds will
activate the call buzzer, if not muted.
After the CALL button is released the LEDS will
SIDETONE LEVEL trimmers
These trimmers (one for each channel) control the
level of your own voice as you hear it in the
speaker or headset. It prevents the speaker from
feeding back into the gooseneck microphone.
Adjustment procedure for all sidetone trimmers:
- set trimmer in start position : fully clockwise.
- switch off the microphone of all connected
(speaker!) stations.
- switch on the microphone of the PS 630.
- turn up volume.
- speak into the headset microphone.
- adjust the listen level by turning the sidetone
trimmers.
The operating area is between fully clockwise and
minimum level.
Adjusting the sidetone does not affect the level of
your voice as it is heard by other stations.
Momentary switching:
When a TALK button is pressed and held, the
microphone will be switched on, and when
released, will be switched off.
3
MASTER VOLUME
This knob adjusts the volume of the speaker or
headset.
7
SIDETONE HI trimmers
These trimmers (one for each channel) control the
User Manual PS 630 / Issue 1 © 1994 ASL Intercom, Utrecht, Holland.
rejection in the high frequency range. It
compensates the capacity of the interconnecting
cables. It prevents the speaker from feeding back
into the gooseneck microphone (unit feedback).
4.0
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FRONT PANEL CONTROLS & CONNECTOR continued
SPEAKER ATTENUATOR trimmer
This trimmer allows you to dim the speaker
automatically, when the gooseneck microphone
is switched on. It prevents:
- unit feedback if sidetone rejection is not
sufficient.
- system feedback or a 'hollow' sound when the
gooseneck microphones of other speaker
stations on the same channel are activated
simultaneously.
Adjustment procedure :
- switch off TALK buttons.
- inject an audio signal on the selected
intercom channel.
- turn up volume.
- activate microphone and adjust the desired
amount of attenuation.
The speaker attenuator has no effect when a
headset is used.
9
BUZZER VOLUME trimmer
This trimmer adjusts the volume of the internal
buzzer, which is located behind the front panel.
The buzzer is activated if you press the CALL
button of the PS 630 or a CALL button of any
other station (on the channel to which the PS 630
is connected), longer than 2 seconds and the
buzzers are not muted (on the master station or
power supply).
10 HEADSET connector
A XLR-4 type connector for the connection of a
local headset when private conversation is
desired. These must have a can impedance of
200 ohms (or greater), or each minimum 400 ohm
when in parallel.
The headset microphone may be of the dynamic
or electret type
Pin assignments :
1. Shield mic. (GND)
2. mic. +
3. phones +
4. phones -
-
on the left or right can.
10 HEADSET connector
A XLR-4 type connector for the connection of a
local headset when private conversation is
desired. These must have a can impedance of
200 ohms (or greater), or each minimum 400
ohmd when in parallel.
The headset microphone may be of the dynamic
or electret type
Pin assignments :
1. Shield mic. (GND)
2. mic. +
3. phones +
4. phones When connecting a headset, speaker and
gooseneck microphone will be disabled
automatically.
The PS 630 can optionally be equiped with a XLR6 headset connector for binaural use.
Jumpers on the front PCB board inside determine
the destination of the listen signals on the
headset.
Each listen signal of the six channels can
independantly be placed:
- on the left or right can.
- on both cans.
11 GOOSENECK MICROPHONE
A high quality electret noise canceling
microphone.
A limiter prevents the mic pre-amp from clipping
when speaking close in the microphone. The
microphone is automatically disabled when a
headset is used.
12 LOUDSPEAKER
A high quality loudspeaker driven by a 1.3 Watt
amplifier.
The speaker is automatically disabled when a
headset is used.
When connecting a headset, speaker and
gooseneck microphone will be disabled
automatically.
The PS 630 can optionally be equiped with a XLR6 headset connector for binaural use.
Jumpers on the front PCB board inside determine
the destination of the listen signals on the
headset.
Each listen signal of the six channels can
independantly be placed:
User Manual PS 630 / Issue 1 © 1994 ASL Intercom, Utrecht, Holland.
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5.0
REAR PANEL CONTROLS & CONNECTOR
13 LINE conectors for channel A thru F
These twelve XLR-3 connectors are for connecting
the PS 630 to the intercom system. Each channel
has it’s own XLR-3 female connector (input) and
XLR-3 male connector (link).
15 DIRECT MIC OUT connector
This connector outputs the pre-amplified
microphone
signal. It is electronically balanced.
14 PROGRAM INPUT connector
This input is electronically balanced and accepts
line
level signals.
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User Manual PS 630 / Issue 1 © 1994 ASL Intercom, Utrecht, Holland.
6.0
INTERNAL CONTROLS
Inside the unit there are severalcontrol that can be
adjusted. These internal controls are located on the
main PC board.
18 PGM ROUTING JUMPERS
16 BINAURAL JUMPER SETTING
For each channel separately, these jumpers
determine
how the audio of that channel can be heard in case
of binaural use.
17 CALL RECEIVE OPTION
For each channel separately, these jumpers enable
the receiption of a CALL signal when the channel is
switched off.
With these two jumpers you can determine, for
binaural applications, how the PGM signal is
controlled
and where it is to be send to.
19 HEADSET MIC GAIN
This trimmer controls the gain of the headset
User Manual PS 630 / Issue 1 © 1994 ASL Intercom, Utrecht, Holland.
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microphone.
20 GOOSENECK MIC GAIN
This trimmer controls the gain of the gooseneck
microphone.
7.0
CABLING
For the PRO Series Intercom system the
interconnecting cables are of the shielded twoconductor microphone cable type and the intercom
line connectors are of the XLR-3 type. Audio and Call
signals are on XLR pin 3, DC power is on XLR pin 2.
XLR pin 1 is connected to the shield of the cable
which functions as the common return for audio and
power.
Since the audio signal is transferred in an
unbalanced way, certain rules have to be obeyed
when installing the cables of an intercom network.
This is to avoid earth loops and to minimize power
loss and the possible effect of electromagnetic
fields.
These rules are:
o Use high quality (multipair) cable.
For interconnecting user stations, power supplies
and accessories in an ASL Intercom network, use
high quality shielded two-conductor (minimum 2x
0.30 mm2) microphone cable only.
In case of a multi channel intercom network, use
high quality microphone 'multipair' cable only, each
pair consisting of two conductors (minimum 2x
0.15 mm2) with separate shield. Multipair cable
should also have an overall shield.
o Use flexible cables.
Use flexible single and multipair microphone cable
instead of cable with solid cores, especially when
the cable is subjected to bending during operation
or installation.
o Separate cable screen to XLR pin 1.
The screen of each separate microphone cable
and/or the screen of each single pair in a multipair
cable, should be connected to pin 1 of each XLR-3
connector. Do not connect this cable screen to the
metal housing of the connector or to metal wall
boxes (outlets).
See page 10 for Earthing Concept.
o Cable trunks, connection boxes and overall
multipair cable screen to clean earth.
Metal cable trunks, metal connection boxes and
overall multipair cable screen should be interconnected and, at one point (the 'central earthing
point') in the intercom network only, be connected
to a clean earth or a safety earth.
See page 10 for Earthing Concept.
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o Keep metal connection boxes and cable trunks
isolated from other metal parts.
Metal housings for intercom cables and connectors
should be mounted in such a way that they are
isolated from other metal cable and connector
housings and from any other metal construction
parts.
o See Party Line, Technical Concept
o Keep cables parallel as much as possible.
When two (multi channel) units in a network are
connected by more than one cable, make sure that
these cables are parallel to each other over the
whole distance between those units. When using
multipair cable, parallelism is ensured in the best
possible way.
o Avoid closed loops.
Always avoid that cables are making a loop. Socalled 'ring intercom' should not physically be
cabled as a ring. All cable routes should have a
'star' configuration, with the central earthing point
(usually close to the power supply position) as the
centre of the star.
o Keep cables away from electromagnetic sources.
Keep intercom cables away from high energy
cables, e.g. 110/220/380V mains power or dimmer
controlled feeds for spotlights.
Intercom cables should cross with energy cables at
an angle of 90 degrees only.
Intercom cables should never be in the same
trunking as energy cables.
User Manual PS 630 / Issue 1 © 1994 ASL Intercom, Utrecht, Holland.
o Place power supply in a central position.
In order to avoid unacceptable power losses, place
the power supply as close as possible to where
most power consumption occurs or, in other
words, most user stations are placed.
o Connect ASL power supply to a 'clean' mains
outlet.
The ASL power supply may be connected to the
mains power outlet to which other audio equipment
is connected. Avoid using mains outlets which also
power dimmer controlled lighting systems.
In case of more complex installations, don't hesitate to
contact us. Please send us a block diagram of the
planned network with a list of all user stations and
their positions, and we are happy to advise you on
cabling lay out.
User Manual PS 630 / Issue 1 © 1994 ASL Intercom, Utrecht, Holland.
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8.0
PARTY LINE, TECHNICAL CONCEPT
10.0 TECHNICAL SPECIFICATIONS PS 630
ASL's PRO Series offers a complete two way ('full
duplex') communications system.
Users of the system are connected via a 'party line'.
Master stations (with built-in power supply), beltpacks,
speaker stations and power supplies are
interconnected via standard microphone cable. One
wire is used as an audio line, one as a power line and
the screen of the cable functions as earth/return.
POWER CONSUMPTION
current (at 30 V DC)
105 mA quiescent
140 mA signalling
280 mA at max. output + signalling
MIC. PREAMP
gooseneck microphone type noise cancelling electret
headset mic. impedance
200 ohms
gain
40 dB - 70 dB (adjustable internally)
presence filter
+6 dB at 5 kHz
frequency response
200 Hz - 13 kHz (-3 dB)
V electret mic
+9 V DC
Current drive is used for signal transfer. Each station
utilises a current amplifier to amplify the microphone
signal and place it on the common audio line where,
due to the constant line impedance (situated in the
power supply between XLR pin 3 and 1), a signal
voltage is developed which can be further amplified
and sent to headphones or loudspeakers.
HEADPHONES DRIVER AMP
max. load
200 ohms
max. output level
normal 14 V rms (200 ohms)
binaural 8 V rms (400 ohms)
max. output power
normal 0.5 W rms (each can)
binaural 0.16 W rms (each can)
This principle has three advantages:
- the use of a single audio line allows several
stations to talk and listen simultaneously.
- due to the high bridging impedance offered by
each station, the number of stations 'on line' has
no influence on the level of the communications
signal.
- power and audio to the intercom stations use the
same cable.
SPEAKER DRIVER AMP
speaker impedance
max. output power
INTERCOM LINE DRIVER
max. output current
output impedance
The Call signal is also sent as a current on the audio
line. It develops a DC potential over the line impedance
which will be sensed by each station and interpreted
as a Call signal.
9.0 GUARANTEE
This unit is warranted by ASL Intercom to the original
end-user purchaser against defects in workmanship
and materials in it's manufacture for a period of one
year from date of shipment to the end-user.
Faults arising from misuse, unauthorised
modifications or accidents are not covered by this
warranty. If the unit is faulty it should be sent in it's
original packing, to the supplier or your local ASL
dealer, with shipping prepaid. A note must be included
stating the faults found and a copy of the original
suppliers invoice.
SIDETONE
rejection
50 ohms
1.3 W rms
3 mA rms
> 150 Kohms
0 - 30dB adjustable
BUZZER
max. SPL
100 dBA
DIMENSIONS AND WEIGHT
width
height
depth
weight
337 mm
87 mm
155 mm
2.94 Kg
GENERAL SYSTEM SPECIFICATIONS
intercom line impedance
350 ohms (1kHz)
2.2 Kohms (DC)
intercom line audio level
nom. -18 dBu
max. +4 dBu
dynamic range
80 dB
call send signal
+2.8 mA
call receive signal threshold
+2.4 V DC
supply voltage
+30 V DC (12 V to 32 V)
mic mute power interrupt time
0.1 sec
Note: 0 dBu = 775 mV into open circuit
ASL reserve the right to alter specifications without
further notice.
THIS PRODUCT WAS DESIGNED, DEVELOPED AND
MANUFACTURED BY:
ASL-intercom
MAARSSEN (UTRECHT) HOLLAND.
E-mail
: info@asl-inter.com
Website : http://www.asl-inter.com
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User Manual PS 630 / Issue 1 © 1994 ASL Intercom, Utrecht, Holland.
User Manual PS 630 / Issue 1 © 1994 ASL Intercom, Utrecht, Holland.
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User Manual PS 630 / Issue 1 © 1994 ASL Intercom, Utrecht, Holland.
User Manual PS 630 / Issue 1 © 1994 ASL Intercom, Utrecht, Holland.
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User Manual PS 630 / Issue 1 © 1994 ASL Intercom, Utrecht, Holland.
User Manual PS 630 / Issue 1 © 1994 ASL Intercom, Utrecht, Holland.
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