ASL INTERCOM BS 217 User manual

BS 217
DUAL CHANNEL MASTER STATION
QUICK GUIDE
October 2013
This product is designed and manufactured by:
ASL Intercom B.V.
Zonnebaan 42
3542 EG Utrecht
The Netherlands
Tel: [phone]
Fax: [phone]
Email: [e-mail]
Web: www.asl-inter.com

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Quick Guide BS 217 / October 2013 © ASL Intercom BV
1.0 GENERAL DESCRIPTION
The BS 217 (19”/1RU) is designed to be a dual
channel master station in an ASL intercom
system. For the connection to remote stations,
use professional microphone cable.
The built-in dual channel power supply can
safely drive up to 15 Basic Series beltpacks
operating at full power. The power supply is
fully protected against wiring mistakes (reverse
power), short circuit or excessive thermal
condition. Should one of these conditions
occur, the unit shuts down. Once the fault
condition has been removed, the unit resets
automatically and full power is restored.
Each channel has a Volume (listen level)
control, a TALK and a CALL button + LEDs.
With a headset connected to the XLR-4
headset connector one can talk and listen to
each channel separately or to both channels
simultaneously.
There are side tone trimmers to adjust the listen
level of one’s voice in one’s headset.
The unique ASL Call system provides both a
flashing red LED and a very distinctive sound
signal. A slight touch of the CALL button makes
the call LED flash, whilst holding the button for
2 seconds the call sound signal is activated.
An Aux input connector with Ground Lift switch
at the rear panel allows injecting an external
line level audio signal into the intercom lines.
Special attention has been paid to the
intelligibility of speech. By applying low
noise/high speed circuitry, a speech presence
filter and a specially designed headphone
amplifier, communication is very comfortable
even in environments with high background
noise levels.
2.0 UNPACKING
The shipping carton contains the parts listed
below
* The BS 217
* Mains power cable
* Spare fuses
If any are missing, contact your dealer.
ASL has taken great care to ensure that this
product reaches you in flawless condition.
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
damage has occurred, please notify your dealer
immediately so that a written claim can be
initiated. Please also refer to the warranty
section of this quick guide.
3.0 MAINS POWER & SAFETY EARTH
Connecting to mains power
The BS 217 may be connected to a mains
power outlet which provides 100 – 240 V AC,
50-60 Hz and at least 60 watts. The outlet
should have a clean earth. Avoid using mains
power outlets which also power dimmer
controlled lighting equipment.
The wires in the mains lead are color coded:
green/yellow: Earth / safety ground
blue: Neutral
brown: Live
In case the wires in the mains lead do not
correspond with the markings identifying the
terminals in the mains plug, proceed as follows:
•The wire which is colored green/yellow
must be connected to the terminal in the
plug which is marked with the letter “E”,
or by the ground symbol, or is colored
green.
•The wire which is colored blue must be
connected to the terminal which is
marked with the letter “N” or colored
black.
•The wire which is colored brown must
be connected to the terminal which is
marked with the letter “L” or colored red.
Safety Earth
For personal safety and proper functioning
of the BS 217 and its remote stations, the
green/yellow wire of the mains lead must
always be connected to the electrical
installation safety earth or ground.
The green/yellow wire is in the BS 217
connected to all exposed metal surfaces. Any
rack framework into which this unit might be
mounted is assumed to be connected to the
same grounding circuit.

4.0 MECHANICAL INSTALLATION
For the BS 217 a vertical rack space of 1RU
(1.75”, 44mm) is required. It is not necessary to
provide rear support by extra bracing or
shelving. Adequate ventilation must be
provided by allowing sufficient space around
the sides and rear of the unit to ensure free
circulation of air.
Forced cooling is not required.
The power supply regulator is mounted on the
rear of the unit; after a period of time it will feel
hot to the touch. This is quite normal, and
should be no cause for alarm.
5.0 FRONT PANEL CONTROLS & CONNECTOR
1 POWER ON/OFF push button
To switch mains power on or off
2 MAINS POWER LED
This LED illuminates if line power is supplied by
the internal power supply.
3 BUZZER VOLUME trimmer
To adjust the volume of the internal buzzer.
The buzzer indicates an incoming or outgoing
call. It is activated by pushing a CALL button on
this station or a CALL button on any other
station for longer than two seconds. .
4 VOLUME knobs for channel A & B
To adjust the listen level for the headset. Each
channel may be adjusted separately.
5 SIDE TONE trimmers (channel A & B)
To adjust the level of one’s voice as heard in
one’s headset.
Adjustment procedure (for each channel
separately):
•set the trimmer in start position: fully
clockwise
•switch off the microphones of all connected
stations
•push the TALK button of the channel
•turn up the volume of the channel
•speak into the headset microphone
•adjust the listen level by turning the side
tone trimmer of the channel.
The trimmer operating area is between fully
clockwise and minimum level.
6 TALK buttons + LEDs, channel A & B
These buttons allows the user to talk to each
channel separately or to both channels
simultaneously. The large green LED’s indicate
whether the talk function is activated.
7 CALL buttons + LEDs, channel A & B
To activate the Call system. By a momentary
push a Call signal is sent to all stations
connected to the referring intercom channel.
The Call LED on this station and on all to the
channel connected stations starts flashing.
Pushing and holding a Call button for 2
seconds activates the call buzzer in all stations.
After the CALL button is released the Call
LED’s continue to flash for a further 2 seconds.
8 AUX VOLUME controls A & B
To adjust the level of the Aux input signal to
each of the two intercom lines.
9 MIC GAIN trimmer
To adjust the input gain of the headset
microphone signal.
10 HEADSET connector (XLR-4)
To connect a headset to the BS 217.
The can impedance must be minimum 200
ohms. The headset microphone may be of the
dynamic or electret type.
Pin assignments:
Pin 1: shield mic. (GND)
Pin 2: mic. +
Pin 3: phones +
Pin 4: phones –

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Quick Guide BS 217 / October 2013 © ASL Intercom BV
6.0 REAR PANEL CONTROLS & CONNECTORS
11 INTERCOM LINE connectors A & B
These XLR-3 type connectors are for
connecting remote stations, using standard
microphone cable. .
12 AUX INPUT connector + Ground Lift
This XLR-3 input is electronically balanced and
accepts line level audio signals
13 FUSE Holder
The fuse protects the BS 216 against severe
internal damage, in case of malfunction in the
power section.
Before replacing a fuse the mains cord must
be disconnected from the mains outlet.
14 MAINS Inlet
IEC Mains connector
7.0 TECHNICAL SPECIFICATIONS
System
Dynamic range: 80 dB (1kHz, THD <1%)
Frequency response: 200 Hz – 15 kHz (-3 dB)
Call signal (send): 2.8 mA
Call signal threshold (receive): < 2.4 V DC
Operating voltage: 24 - 32 V DC
Intercom line
Impedance: 350 Ω (1 kHz), 2.2 kΩ (DC)
Audio level: nom. -18 dBu, max. 0 dBu
Switch Mode Power Supply
Mains voltage: 100 - 240 V AC, 50/60 Hz
Output voltage: 30 V DC (+/- 5%)
Max output power: 45 W
Headphone Driver Amp
Max. output level: 11.6 Vrms (at 200 Ω)
Max. output power: 0.7 Wrms (at 200 Ω)
Mic Pre-amp
Gain: 40 - 60 dB
Presence filter: +6dB @ 5 kHz
Power to electret mic: 9 V DC
Side Tone
Rejection: 0 - 30 dB adjustable
Buzzer
Max. SPL: 90 dBA @ 0.1m
Aux Input
Input Impedance: 33 kΩ
Nominal Input Level: 0 dBu
Max. Input Level: +22 dBu
BS 217 Dimensions & Weight
Width: 19” (483 mm) / Height: 1RU (44.5 mm)
Depth: 140 mm / Weight: 1.75 Kg
0 dBu defined as 775 mV rms into open circuit.
ASL reserves the right to alter specifications without prior notice
For safety instructions and further information, see the BS 217 user manual
Go to www.asl-inter.com, section ‘Support’, and review the referring manual
8.0 WARRANTY
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,
unauthorized modifications or accidents or are not
covered by this warranty.
If the unit is faulty it should be sent in its 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.