ps 230 dual channel speaker station user manual
Contents
1. 30 dB Headphone Driver Amp Max output level 14 V rms 200 O Max output power 1 W rms 400 O Speaker Driver Amp Speaker impedance 25 Max output power 2 9 W rms Side Tone Rejection 0 30 dB adjustable Buzzer Max SPL 85 dBA PS 230 Power Consumption Current at 30V DC 35 mA quiescent 70 mA signaling 190 mA at max output signaling PS 2130 Dimensions amp Weight Width 230 mm Height 88 mm Depth 42 48 mm sloping Weight 1 3 Kg 0 dBu 775 mV into open circuit ASL reserves the right to alter specifications without prior notice User Manual PS 230 Issue 2011 ASL Intercom BV 9 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 consist 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 a signal voltage is developed which can be further amplified and sent to headphones or loudspeakers 10 0 CABLING This principle has three advantages the use of a single audio line allows several Stations to talk and listen simultaneously 2 due to the high bridging impe2. rack taking 2U of rack space User Manual PS 130 Issue 2011 ASL Intercom BV 4 0 FRONTPANEL CONTROLS amp CONNECTORS PS 230 Speoker Station 8 1 VOLUME control knobs Theses knobs one for each channel adjust the listen level for the headset and the loudspeaker 2 TALK buttons These push buttons one for each channel activate the gooseneck or headset microphone The large green LEDs indicate if the microphone is switched on Momentary switching If a TALK button is pushed and held the microphone signal is sent to the corresponding intercom channel until the button is released Latched switching If a TALK button is pushed quickly it is electronically latched and the microphone signal is sent to the corresponding intercom channel If pushed again the TALK button switches off Mic Mute when latched on After on the intercom channel a so called MIC Mute signal has been received from a PRO Series master station or separate power supply the connection between microphone and intercom channel is interrupted By pushing the TALK button the connection is restored again VU 10 speoker attenuation side ine D ALK TALK 3 3 CALL buttons These push buttons one for each channel activate the call system a momentary push a visual call signal is sent to all stations connected to the corres
3. ANALOG INTERCOM PS 230 DUAL CHANNEL SPEAKER STATION niti O Ws ER USER MANUAL Issue 2011 ASL Intercom BV DESIGNED AND MANUFACTURED BY ASL Intercom B V 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 CONTENT OF THIS USER MANUAL 1 0 GENERAL DESCRIPTION T ALME Te E IN MN ME 4 0 FRONTPANEL CONTROLS amp CONNECTORS 50 JNIEHNAL COIN Wel G a T0 IRp 80 TECHNICAL SPECIFICATIONS eee ere eee 9 0 PARTY LINE TECHNICAL CONCEPT 10 0 CABLING uu rnnnn M 11 0 PS 230 BLOCK DIAGRAM deci ab etos 12 0 SYSTEM CONFIGURATIONN T 15 0 EARIHING CONCEPT RE PAGE 2 User Manual PS 130 Issue 2011 ASL Intercom BV 1 0 GENERAL DESCRIPTION The PS 230 is a dual channel speaker station designed for use in both portable and fixed ASL intercom systems It incorporates a loudspeaker and a gooseneck microphone and provides full duplex communications The PS 230 RM model has a small built in electre
4. D OFF WHEN HEADSET GOOSENECK MIGS PLUGGED IN AUDIO FILTERA CURRENT SOURCE A LINE B CALL SWITCH A COMPARATOR A AUDIO FILTER B CURRENT SOURCE B CALL SWITCH B COMPARATOR B GENERATOR SYSTEM CONFIGURATION lew f CAMERA 2 TELEPHONE CAMERA 1 2 CHANNEL INTERCOM NETWORK CONFIGURATION PAGE 8 User Manual PS 230 Issue 2011 ASL Intercom BV SPEAKER AMP AUTOMATICALLY SWITCHED OFF WHEN HEADSET SPEAKER AMPLIFIER NORMAL 11 BINAURAL LED CONTROLL A BUZZER VOLUME 1 2 BUZZER BLOCK DIAGRAM PS 230 14 6 2011 TELEPHONE LINE 13 0 EARTHING CONCEPT POWER SUPPLY 21 22 Line Impedances Mains Earth EN EA E ud Wallbox n Lp Lr peg ONLY ONE Individual intercom line shield EARTHING POINT not to be connected with overall shielding Overall shield of multipair cable and or metal cable trunk EARTHING CONCEPT ASL INTERCOM PAGE 9 User Manual PS 230 Issue 2011 ASL Intercom BV
5. ally disabled and speak into the headset microphone Check whether the level of your voice in the headset can s Is sufficient If not push up the listen level of the corresponding channel a bit by turning side tone trimmer 4 clockwise The trimmers operating area is between fully clockwise and minimum level Adjusting the side tone does not affect the level of your voice as it is heard by other stations 6 SPEAKER ATTENUATOR trimmer This trimmer adjusts the extent to which the speaker is automatically dimmed when 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 microphones of other speaker stations on the intercom channel are switched as well Adjustment procedure make sure there is no headset connected feed an audio signal into one of the intercom channels via an AUX input on a master station or a separate power supply turn up the listen volume activate the gooseneck microphone 10 speoker attenuation side tone ALK TALK 3 e adjust the desired degree of speaker attenuation turning the trimmer counter clockwise increases the attenuation 7 BUZZER VOLUME trimmer This trimmer adjusts the volume of the internal buzzer The buzzer is activated if a CALL button of the PS 230 is pu
6. ch 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 connecior Do not connect this cable screen to the metal housing of ASL units or XLR 3 wall boxes See section Earthing Concept Connect cable trunks connection boxes and overall multi pair cable screens to clean earth Metal cable trunks metal wall boxes and overall multi pair 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 connector 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 cables are making a 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 control
7. dance offered by each station the number of stations on the party line has no influence on the level of the communications signal 3 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 is sensed by each station and interpreted as a Call signal 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 ASL intercom system Use high quality cable Use high quality microphone cable shielded two conductor cable minimum 2x 0 30 mm2 In case multi pair cable is used 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 Cable screens to XLR pin 1 The screen of ea
8. djusted at the front panel Fully electronic switching increases reliability and allows for soft microphone ON switching latching or momentary remote Mic Mute facility automatic speaker attenuation adjustable when the microphone is activated The shipping carton contains the parts below 230 User manual If any are missing contact your dealer ASL has taken great care to ensure this product reaches you in flawless condition After unpacking the unit please inspect for any 3 0 INSTALLATION 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 manual Connecting the PS 230 to an intercom system is straightforward Connect the intercom lines the party lines to the LINE connectors on the side panel of the PS 230 There are no separate power connections or batteries to install as the necessary DC voltages are derived from a master station or a separate power supply via the intercom connection cables Use professional flexible microphone cable with 2 wires and 1 shield only The PS 230 is fully protected against wiring mistakes reverse power or short circuit in the interconnecting cables A special kit is available for mounting the PS 230 in a 19
9. he PC board The trimmers can be reached as follows e remove the screws of the bottom plate e slide the plate to one side and take it out e take away the plastic isolation plate The two trimmers are labeled GOOSE for the gooseneck microphone HEADS for the headset microphone 7 0 WARRANTY This unit is warranted by ASL Intercom to the original end user purchaser against defects in workmanship and materials in its manufacture for a period of one year from date of shipment to the end user Faults arising from misuse unauthorized 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 8 0 TECHNICAL SPECIFICATIONS System Specifications Dynamic range 80 dB 1 kHz THD lt 1 Call signal send 2 8 mA Call signal threshold receive 2 4V DC Supply voltage 30V DC 12V to 32V Power interrupt time Mic Mute 0 1 sec Line Impedance 350 Q 1 kHz 2 2 kO DC Audio level nom 18 dBu max 4 dBu Microphone Pre amps Headset mic impedance 200 O Gain 40 60 dB adjustable internally separately for the headset mic and the gooseneck mic Presence filter 6 dB 5 kHz Frequency response 200 Hz 15 kHz 3dB Power to electret mic 9V DC Limiter range gooseneck mic
10. led feeds for spotlights Intercom cables should cross high energy cables at an angle of 90 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 the mains outlet with a clean earth Other audio equipment may be connected to this outlet but avoid using an outlet which also powers dimmer controlled lighting systems In case of more complex installations don t hesitate to contact us Please send 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 230 Issue 2011 ASL Intercom BV 11 0 12 0 PS 230 BLOCK DIAGRAM XLR pin 2A LUUD p gt e LEDA SIDETONE ADJUSTMENT A XLR pin 3A LINEA BUFFERA IS PLUGGED IN ELECTRONIC TALK SWITCH A HEADSET MIC GAIN MIC PREAMP n TALK SWITCHA LISTEN VOLUME A XLR pin 3 B LINEB XLR pin 2B BUFFER B Bes n ELECTRONIC TALK SWITCH B LISTEN VOLUME B GOOSENECK MIC GAIN 7 WKLEDB TALK SWITCH B SIDETONE ADJUSTMENT B GOOSENECK AUTOMATICALLY SWITCHE
11. ponding intercom channel and the call LEDs start flashing By holding a CALL button pushed for 2 seconds the call buzzer is activated provided there is no buzzer mute on one or both intercom channels After the CALL button is released the LEDs continue to flash for a further 2 seconds 4 SIDE TONE LEVEL trimmers These trimmers one for each channel are for minimizing the speaker feeding back into the gooseneck microphone unit feedback They also determine the level of your own voice as you hear it in the speaker or headset 5 SIDE TONE HI trimmers These trimmers one for each channel have the same function as trimmer 5 but solely for the high frequencies 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 make sure there is no automatic speaker attenuation turn trimmer 6 fully clockwise push the TALK button of the corresponding channel slowly turn up the listen volume speak into the gooseneck microphone PAGE 4 User Manual PS 230 Issue 2011 ASL Intercom BV PS 230 Speoker Station 8 e adjust the speaker listen level of the corresponding channel to a minimum by turning the side tone trimmers counter clockwise first trimmer 4 and then trimmer 5 repeat this a few times Connect a headset to the PS 230 the speaker and gooseneck mic are now automatic
12. shed or a CALL button of any other station on a channel to which the PS 230 is connected longer than 2 seconds provided there is no buzzer mute on one of the channels 8 HEADSET connector To this XLR 4 connector a headset may be connected The headset can must have an impedance of 200 ohms minimum When there 2 cans in parallel each can must have an impedance of 400 ohms minimum The headset microphone may be of the dynamic or electret type XLR 4 pin assignments Pin 1 Shield mic GND Pin 2 mic Pin 3 phones Pin 4 phones When connecting a headset the speaker and gooseneck microphone are disabled automatically 9 GOOSENECK MICROPHONE The PS 230 is equipped with an electret noise canceling gooseneck microphone A limiter prevents the microphone preamplifier from clipping when speaking close into the microphone 10 LOUDSPEAKER A high quality loudspeaker driven by a 2 9 Watt amplifier PAGE 5 User Manual PS 230 Issue 2011 ASL Intercom BV 5 0 SIDE PANEL CONNECTORS 11 LINE connector channel A 12 LINE connector channel B These connectors are for connecting the PS 230 to the party lines of an intercom system XLR 3 pin assignments 1 0 V ground shield 2 30V power wire 3 audio wire 12 11 6 0 INTERNAL CONTROLS Inside the unit there are two trimmers to adjust the mic gain of the gooseneck microphone and the headset microphone separately The trimmers are located on t
13. t microphone Each channel has Volume listen level Control a TALK and CALL button with LED indicators and a 2 stage side tone trimmer Furthermore there are trimmers for speaker attenuation and buzzer volume The unit is equipped 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 gooseneck 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 the gooseneck microphone and speaker are disabled automatically 2 0 UNPACKING The XLR 4 headset connector can be replaced by ASL by a XLR 5 connector for binaural use of the headset Special attention has been paid to the intelligibility of speech By applying low noise high speed op amps a speech presence filter and a specially developed high power bridged headphone amplifier communication is very comfortable even in environments with high back ground noise level There is a Separate amplifier for the loudspeaker The unique ASL CALL system provides both a flashing red LED and a very characteristic sound signal the buzzer Smooth operation is guaranteed with the CALL button Only a slight touch makes the red LED flash whilst holding the button for two seconds activates the CALL sound signal The volume of this signal the buzzer can be a
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