User Manual PS 430

PS 630
SIX CHANNEL
REMOTE SPEAKER STATION
USER MANUAL
August 2016
This product is designed and manufactured by:
ASL Intercom BV
Zonnebaan 42
3542 EG Utrecht
The Netherlands
Phone: +31 (0)30 2411901
Fax: +31 (0)30 2667373
E-mail: info@asl-inter.com
Web: www.asl-inter.com
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User Manual PS 630 / August 2016 © ASL Intercom BV
CONTENT OF THIS USER MANUAL
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
11.0
INTRODUCTION .................................................................................... 3
INSTALLATION ...................................................................................... 3
FRONT PANEL CONTROLS & CONNECTOR ...................................... 4
REAR PANEL CONNECTORS .............................................................. 7
INTERNAL CONTROLS ......................................................................... 7
TECHNICAL SPECIFICATIONS PS 630 .............................................. 8
PARTY LINE, TECHNICAL CONCEPT ................................................. 9
CABLING ............................................................................................... 9
PS 630 BLOCK DIAGRAM .................................................................. 10
EARTHING CONCEPT ....................................................................... 11
SYSTEM CONFIGURATION ............................................................... 11
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User Manual PS 630 / August 2016 © ASL Intercom BV
1.0 INTRODUCTION
The PS 630 is a six channel remote speaker
station designed for use in an ASL Intercom
system. It incorporates a loudspeaker, a
gooseneck mic and a headset connector and
provides full duplex communications.
The PS 630 RM model has, instead of a
gooseneck mic, a built-in electret microphone.
Each channel has a Volume (listen level) control,
a TALK and CALL button with LED indicators and
a two-stage side tone trimmer.
A master volume knob controls the
speaker/headset volume.
The unit is equipped with a limiter for the
gooseneck microphone, allowing to speak close
into the microphone without giving rise to overload
and distortion.
Loudspeaker dimming is automatic if the
microphone is active.
If a headset is plugged in, both gooseneck
microphone and loudspeaker are disabled
automatically.
As an option, an XLR-6 headset connector can be
fitted for binaural use of the headset: each
channel can be assigned to either the left or the
right headset can, or to both headset cans.
The PS 630 has an electronically balanced
program audio input for local volume controlled
monitoring only. The program audio does not
appear on the intercom lines.
Special attention has been paid to the intelligibility
of speech. By applying low noise/high speed opamps, a speech presence filter and proprietary
and bridged headphone amplifiers, communication
is very comfortable even in environments with high
background noise level. There are separate
amplifiers for headset and loudspeaker.
The unique ASL CALL system provides both a
flashing red LED and a very distinctive sound
signal. Only a slight touch of the CALL button
makes the red LED flash, whilst holding the button
for two seconds activates the Call sound signal.
The volume of the sound signal (buzzer) can be
adjusted at the front panel.
The pre-amplified microphone signal is
electronically balanced available at the ‘Mic Direct
Out’ connector at the rear panel.
Fully electronic switching increases reliability and
allows for 'soft' microphone on switching (latched
or momentary), remote Mic Mute facility and
automatic speaker attenuation.
2.0 INSTALLATION
To connect the PS 630 to the intercom system,
use professional microphone cable with 2 wires
and 1 shield only. Connect the intercom cables to
the LINE connector sockets at the rear panel.
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User Manual PS 630 / August 2016 © ASL Intercom BV
The PS 630 is fully protected against eventual
wiring mistakes (reverse power) or a short circuit
in the interconnect cables.
A kit is included for mounting the PS 630 in a 19"
rack, taking 2U of rack space.
3.0 FRONT PANEL CONTROLS & CONNECTOR
1
LISTEN LEVEL control knobs
To preset the listen level for each intercom
channel. By turning the knob fully counter
clockwise, the channel is switched off.
See #17 for receiving a Call signal whilst the
channel is switched off
2
TALK buttons
These buttons allow talking to each channel
separately or to several channels simultaneously.
If a TALK button is activated, its green LED is lit.
To activate the call system, for each channel
separately. By a momentary push a call signal is
sent to all stations connected to the referring
intercom channel and all Call LEDs start flashing.
Pushing and holding the CALL button for 2
seconds activates the call buzzer (if not muted by
a Buzzer Mute signal received from a PRO Series
master station or separate power supply).
Momentary switching:
If a TALK button is pushed and held, the
microphone signal is sent to the referring intercom
channel until the button is released.
Latched switching:
If a TALK button is pushed shortly, it is
electronically latched and the microphone signal is
sent to the referring intercom channel. If pushed
again, the Talk button switches off.
Mic Mute when latched on:
After on an intercom channel a so-called Mic Mute
signal has been received from a PRO Series
master station or power supply the connection
between microphone and the referring intercom
channel is interrupted. By pushing the TALK
button, the connection is restored and one can
talk to the intercom channel again.
3
CALL buttons
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User Manual PS 630 / August 2016 © ASL Intercom BV
4
MASTER VOLUME knob
This knob is a master volume control of the listen
levels of the 6 intercom channels (see also #1), for
both the speaker and the headset.
5
PGM VOLUME knob
To adjust the volume of the Program audio, both
for the speaker and the headset. Depending on
the setting of internal jumpers (see #18), the
master volume knob functions as a master control
for both PGM and intercom volume.
6
SIDE TONE LEVEL trimmers
With these trimmers (one for each channel) the
level of your voice in your own loudspeaker or
headset is adjusted.
7
SIDE TONE HI trimmers
With these trimmers (one for each channel) the
rejection in the high frequency range is adjusted.
Trimmers #6 and #7 also minimize the speaker
feeding back into the gooseneck microphone (unit
feedback).
Adjustment procedure for both side tone trimmers,
for each channel separately:
 set trimmer in start position : fully
clockwise
 switch off the microphones of all connected
(speaker-) stations
 Connect a headset to this PS 630
 push the TALK button of the channel of
which the side tone is supposed to be
adjusted
 turn up the listen volume of the PS 630.
 speak into the headset microphone.
 adjust the listen level (your own voice) by
turning the side tone trimmer.
The trimmer operating area is between fully
clockwise and minimum level.
For optimum result, repeat the side tone
adjustment procedure with trimmers #6 and #7
a few times.
Adjusting side tones does not affect the level of
your voice as it is heard by other stations.
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User Manual PS 630 / August 2016 © ASL Intercom BV
8
SPEAKER ATTENUATOR trimmer
With this trimmer one adjusts the extent to which
the loudspeaker is automatically dimmed if the
gooseneck microphone is switched on. It prevents
unit feedback if side tone rejection is not sufficient.
It also minimizes system feedback or a 'hollow'
sound when the gooseneck mics of other speaker
stations are switched on.
10
HEADSET connector
An XLR-4 connector for the connection of a
headset. The headset must have a can
impedance of minimum 200 Ω. If the headset has
2 cans in parallel, each can must have an
impedance of minimum 400 Ω. The headset
microphone may be of the dynamic or electret
type.
Adjustment procedure :
 switch off the TALK buttons
 inject an audio signal into one of the
channels
 turn up the listen volume of the selected
channel
 activate the microphone (push the TALK
button)
 adjust the degree of attenuation.
Pin assignments :
Pin 1: Shield mic. (GND)
Pin 2: mic. +
Pin 3: phones +
Pin 4: phones If a headset is connected, loudspeaker and
gooseneck microphone are disabled automatically
9
BUZZER VOLUME trimmer
To adjust the volume of the internal buzzer.
The buzzer is activated if the CALL button of the
PS 630 (or a CALL button of any other station on
the channels to which the PS 630 is connected) is
pushed for longer than 2 seconds.
The buzzer may be muted after a so-called All
Buzzer Mute signal has been received from a
PRO Series master station or separate power
supply.
The PS 630 may optionally be equipped with a
XLR-6 headset connector for binaural use.
Jumpers on the internal front PCB (see #16)
determine the routing of each channel to the
headset cans: either to the left can, or the right
can or to both cans or to none of the cans.
11
GOOSENECK microphone
This is an electret noise cancelling microphone.
A limiter prevents the mic pre-amp from clipping
when speaking close into the microphone.
12
LOUDSPEAKER
A high quality 16 Ω loudspeaker
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User Manual PS 630 / August 2016 © ASL Intercom BV
4.0
REAR PANEL CONNECTORS
13
LINE connectors (A thru F)
These twelve XLR-3 connectors are for
connecting the PS 630 to the intercom party lines.
Each channel has an XLR-3 female connector
(input) and an XLR-3 male connector (link).
14
PROGRAM AUDIO INPUT connector
This input is electronically balanced and accepts
line level audio signals.
In case of binaural use of the PS 630, internal
jumpers (see #18) determine the routing of the
PGM signal to the headset.
15
DIRECT MIC OUT connector
This connector outputs the pre-amplified
microphone signal, electronically balanced.
5.0 INTERNAL CONTROLS
16
BINAURAL ROUTING jumpers
In case of binaural use of the PS 630, these
jumpers determine – for each channel separately the routing of the intercom audio to the headset.
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User Manual PS 630 / August 2016 © ASL Intercom BV
17
CALL RECEIVE jumpers
For each channel separately, these jumpers enable or disable the reception of a CALL signal when the
channel is switched off.
18
PGM ROUTING jumpers
With these two jumpers one determines whether the PGM (program audio) listen level is also controlled by
the Master Volume knob (see #4) and – in case of binaural use of the PS 630 - the routing of the PGM
signal to the headset.
19
HEADSET MIC GAIN
To adjust the gain of the headset microphone.
20
GOOSENECK MIC GAIN
To adjust the gain of the gooseneck microphone.
6.0 TECHNICAL SPECIFICATIONS PS 630
System
dynamic range: 80 dB
frequency response: 200 Hz - 15 kHz (-3 dB)
call send signal: +2.8 mA
call signal threshold (receive): +2.4 V DC
operation voltage: 24 - 30 V DC
power interrupt time (mic mute): 0.1 sec
monaural: 1.3 Wrms @ 200 Ω
binaural: 2x 0.27 Wrms @ 400 Ω
Side Tone
Rejection: 0 - 30dB adjustable
Intercom Line
impedance: 350 Ω (1kHz), 2.2 kΩ (DC)
audio level: nom. -18 dBu, max. 0 dBu
Mic. Pre-amps
gain: 40 - 60 dB (adjustable internally)
presence filter: +6 dB at 5 kHz
power to electret mic: +9 V DC
Headphones Driver Amps
max. output level:
monaural: 16 Vrms @ 200 Ω
binaural: 2x 10.3 Vrms @ 400 Ω
max. output power:
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User Manual PS 630 / August 2016 © ASL Intercom BV
Buzzer max. SPL: 85 dBA
Speaker Driver Amp
max. output power: 1.6 Wrms @ 16 Ω
Program Audio Input
input impedance: 28 kΩ (balanced)
nominal input level: 0 dBU
max. input level: +15 dBu
Direct Mic Output
output impedance: 50 Ω (balanced)
nominal Output Level: + 6 dBu
max. Output Level: +21 dBu
Power Consumption PS 630
current (at 30 V DC):
105 mA quiescent, 140 mA signaling
280 mA at max. output + signaling
Dimensions & Weight PS 630
width: 337mm / height: 87 mm
depth: 155 mm / weight: 2940 grams
0 dBu is defined as 775 mV into open circuit
ASL reserves the right to alter specifications
without prior notice
7.0
PARTY LINE, TECHNICAL CONCEPT
User stations in an ASL intercom system are
connected via one or several 'party lines'. A party line
offers two way (‘full duplex’) communication and
consists of standard microphone (multi-pair) cable.
One wire is used as an audio line, one as a power line
and the screen of the cable functions as earth/return.
Current drive is used for signal transfer. Each station
utilizes 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 the headphones or loudspeakers.
8.0
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 the
party line has no influence on the level of the
communications signal
 power and audio to the intercom stations use
the same cable
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.
CABLING
The intercom lines (the ‘party lines’) are of the shielded two-conductor microphone cable type. The intercom line
connectors are of the XLR-3 type. Audio and Call signals are on pin 3, DC power is on pin 2 and pin 1 is connected to
the shield of the cable which functions as the common return for audio and power.
The audio signal is transferred in an unbalanced way (see ‘Party Line, Technical Concept’).
To avoid earth loops (hum), the possible effect of electromagnetic fields and to minimize power loss, certain rules have
to be obeyed when installing the cabling of an intercom system :
Use high quality cable
Use high quality microphone cable (shielded two
conductor cable, minimum 2x 0.30 mm2).
In case multi-pair microphone cable is used, it should
be of high quality and each pair should consist of two
conductors (minimum 2x 0.15 mm2) with separate
shield and an overall shield.
Use flexible cable
Use flexible single and multi-pair microphone cable
instead of cable with solid cores, especially when the
cable is subjected to bending during operation or
installation.
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User Manual PS 630 / August 2016 © ASL Intercom BV
Cable screens to XLR pin 1
The screen of each separate microphone cable and/or
the screen of each single pair in a multi-pair cable,
should be connected to pin 1 of each XLR-3 connector.
Do not connect these screens to the metal housing of
ASL unitst or XLR-3 wall boxes. See section ‘Earthing
Concept’.
Connect metal cable trunks, wall boxes and overall
multi-pair cable screens to clean earth
Metal cable trunks, metal wall boxes and overall multipair cable screens should be interconnected and, at
the 'central earth point' in the intercom network only, be
connected to a clean earth or a safety earth. (see
section ‘Earthing Concept’).
Keep metal connection boxes and cable trunks or
pipes isolated from other metal parts
Metal trunks or pipes for intercom cables and metal
connection boxes should be mounted in such a way
that they are isolated from any other metal housing or
construction part.
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 multi-pair
cable, parallelism is ensured in the best possible way.
Avoid closed loops
Always avoid that intercom cables are making a closed
loop. So-called 'ring intercom' should not physically be
cabled as a ring
Keep cables away from electromagnetic sources
Keep intercom cables away from high energy cables,
e.g. 115/230/400V mains power or dimmer controlled
feeds for spotlights. Intercom cables should cross high
energy cables at an angle of 90º only. Intercom cables
should never be in the same trunks as energy cables.
Place power supply in a central position
In case of a system powered by a separate power
supply: In order to diminish power losses, place the
power supply as close as possible to where most
power consumption occurs, in other words most user
stations are placed.
ASL powered units to a 'clean' mains outlet
Master stations or power supplies should be connected
to a mains outlet with a clean earth. Other audio
equipment may be connected to this mains outlet, but
avoid using an outlet which also powers dimmer
controlled lighting systems.
9.0
PS 630 BLOCK DIAGRAM
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User Manual PS 630 / August 2016 © ASL Intercom BV
10.0
EARTHING CONCEPT
11.0
SYSTEM CONFIGURATION
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User Manual PS 630 / August 2016 © ASL Intercom BV
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User Manual PS 630 / August 2016 © ASL Intercom BV