PS 29 DUAL CHANNEL BELTPACK USER MANUAL
Contents
1. ANALOG INTERCOM PS 29 DUAL CHANNEL BELTPACK ASL USER MANUAL Issue 2011 ASL Intercom BV 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 CONTENT OF THIS USER MANUAL 1 0 2 0 3 0 4 0 5 0 6 0 7 0 9 0 10 0 11 0 12 0 13 0 14 0 GENERAL DESCRIPTION cecinit renane Be dlcm lp Rm ugs mI WARRANT c FRONT PANEL CONTROLS EEN REAR PANEL CONNECTORS 7 4 seen enne nnne INTERNAL CONTROLS S A TECHNICAL SPECIFICATIONS PS 29 PART LINE TECHNICAL CONCERT GADING BLOCK DIAGRAM PS 29 SYSTEM CONFIGURATION essere nnne enne nnne EARTHING CONCEPT 2 nana nenen aaa PAGE 1 User Manual PS 29 Issue 2011 ASL Intercom BV 1 0 GENERAL DESCRIPTION The PS 29 is a portable dual channel intercom station It is housed in a strong ABS case provided with a steel belt clip On the front panel the unit has for each channel A and B separately a Volume listen level control a TALK push button with LED indicator and a CALL push button with LED indicator On the rear panel are two XLR 3 connectors for the intercom connection2. ation and interpreted as a Call signal 11 0 CABLING The intercom lines the party lines in an ASL analog intercom system 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 XLR pin 3 DC power is on XLR pin 2 XLR pin 1 is connected to the cable shield 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 there should be an overall shield and each pair should consist of two conductors minimum 2x 0 15 mm2 with separate 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 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 units or XLR 3 wall boxes oee section Earthing Concep
3. cables two party lines and an XLR 4 connector for the headset As an option an XLR 5 headset connector can be fitted allowing to hear channel A at the left headset can and channel B at the right headset can On the side panel are a side tone trimmer and a buzzer volume trimmer 2 0 UNPACKING The shipping carton contains the PS 29 and this user manual If any are missing contact your dealer ASL has taken great care to ensure this product reaches you in flawless condition 3 0 INSTALLATION This PS 29 will form a part of an existing or new intercom system 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 cables 40 WARRANTY This unit is warranted by ASL to the original end user purchaser against defects in workmanship and materials in its manufacture for a period of 12 months from date of shipment to the end user Faults arising from misuse unauthorized modifications or accidents are not covered by this warranty opecial attention has been paid to the intelligibility of speech By applying low noise high speed op amps a speech presence filter and propriety high power bridged headphone amplifiers communication is very comfortable even in environments with a high level of background noise The unique ASL call system provides both a flas
4. djust the listen level by turning the side tone trimmer The trimmers operating area is between fully clockwise and minimum level Adjusting the side tone does not affect the level of your voice as heard by the other stations on the referring party line channel H BUZZER VOLUME trimmer With this trimmer one adjusts the volume of the internal buzzer The buzzer is muted if a Buzzer Mute signal has been received from a Pro Series master station or power supply TECHNICAL SPECIFICATIONS PS 29 Intercom System Dynamic range 80 dB 1 kHz THD 196 Call signal 2 8 mA Call signal threshold receive 2 4V DC Supply voltage 30V DC 12 32V DC Power interrupt time mic mute 0 1 sec Line Impedance 350 O 1 kHz 2 2 kO DC Audio level nom 18 dBu max 4 dBu Mic pre amp Headset mic impedance 200 O Gain 35 60 dB adjustable internally Presence filter 6 dB at 5 kHz Frequency response 200Hz 15 kHz 3 dB Power to electret mic 9V DC Side Tone Rejection 0 30 dB adjustable Buzzer Max SPL 85 dBA Headphone Driver Amps Max load 200 O Max output level monaural 14 Vrms 2000 binaural 2 10 6 Vrms 400 Max output power monaural 1 Wrms 9 200 binaural 2x 0 28 Wrms 400 PS 29 Power Consumption Current at 30V DC 30 mA quiescent 45 mA at signaling 170 mA at max output signaling PS 29 Dimensions amp Weight Width 90 mm Height 50 mm incl clip Dept
5. h 124 mm Weight 350 grams 0 dBu defined as 775 mV into open circuit ASL reserves the right to alter specifications without prior notice User Manual PS 29 Issue 2011 ASL Intercom BV 10 0 PART LINE TECHNICAL CONCEPT User stations and power supplies 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 That signal is put on the common audio line Due to the constant line impedance a signal voltage is developed which can be further amplified and sent to the headphones or loudspeakers The line impedance is situated in the power supply between XLR pin 3 and 1 This principle has three advantages o the use of a single audio line allows several stations to talk and listen simultaneously o 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 audio signal o power and audio to the intercom stations use the same cable Also the Call signal is sent as a current on the audio wire It develops a DC potential over the line impedance which is sensed by each intercom st
6. hannel separately or to both channels simultaneously When a TALK button is switched on its large green LED is lit Momentary switching When a TALK button is pushed and held the microphone signal is sent to the referring intercom channel until the button is released 6 0 REAR PANEL CONNECTORS 4 LINE connector channel A 5 LINE connector channel B These XLR 3 connectors are for connecting the PS 29 to intercom party lines Pin assignments Pin 1 OV ground shield Pin 2 30 DC power wire Pin 3 audio wire Latched switching When a TALK button is pushed shortly it is electronically latched and the microphone signal is sent to the referring intercom channel When pushed again the TALK button switches Off Mic Mute when latched On After a so called Mic Mute signal has been received from a Pro Series master station or power supply the connection between microphone and 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 By pushing one of this buttons the Call function is activated for the referring party line channel With a momentary push a Call signal is sent to all intercom stations connected to that channel The Call LED s on this PS 29 and on all stations connected to the same party line start flashing By pushing the Call button for 2 seconds the Call Buzzers are activated provided the buzzers are not mu
7. hing red LED and a very distinctive sound signal A momentary push of the Call button makes the red LED flash whilst holding the button for 2 seconds activates the Call sound signal The volume of this sound signal the buzzer can be adjusted at the side panel Fully electronic switching increases reliability and allows for e soft microphone On switching latched or momentary e Remote Mic Mute facility After unpacking the unit please inspect for any physical damage 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 To connect the PS 29 to the intercom system use professional flexible microphone cable with 2 wires and 1 shield only The PS 29 is fully protected against mis wiring reverse power or short circuit in the interconnecting cables If the unit is faulty it should be sent in its original packing to the supplier or your local ASL dealer shipping costs prepaid A note must be included stating the fault s found and a copy of the original suppliers invoice User Manual PS 29 Issue 2011 ASL Intercom BV 5 0 FRONT PANEL CONTROLS PS 29 1 VOLUME control knobs These knobs are for adjusting the listen levels for each channel separately 2 TALK buttons These buttons allow talking to each c
8. ower 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 User Manual PS 29 Issue 2011 ASL Intercom BV 12 0 BLOCK DIAGRAM PS 29 XLR pin 2A XLR pin 3A U power A CINE A BUFFER A POWER AMPLIFIER CURRENT SOURCE A LISTEN VOLUME A MIC PREAMP O MICROPHONE V SIDETONE ADJUSTMENTA E TALK LED A MIC GAIN TALK SWITCH A XLR pin 2 B XLR pin 3 B U power B o LINE B BUFFER B POWER AMPLIFIER ELECTRONIC TALK SWITCH v CURRENT SOURCE B LISTEN VOLUME B NORMAL 1 BINAURAL MULTI TALK LED B SIDETONE ADJUSTMENT B VIBRATOR TALK SWITCH B CALL LED A LED CALL LED A CONTROLL A gt gt CURRENT SOURCE A DELAY AUDIO FILTER A CALL SWITCH A p i CALL LED B LED CALL LED B DELAY CONTROLL B L L LINE B WW CURRENT SOURCE B AUDIO FILTER B CALL SWITCH B COMPERATOR B BUZZER VOLUME E BUZZER GENERATOR E DELAY A ASL Intercom BV ZONNEBAAN 42 3542EG Utrecht THE NETHERLANDS ALL RIGHTS RESERVED itle BLOCK DIAGRAM PS 29 ize Document N
9. t Connect metal cable trunks wall 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 oee 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 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 p
10. ted by a Buzzer Mute signal received from a Pro Series master station or power supply After the CALL button is released the LED s continue to flash for a further 2 seconds 6 HEADSET connector This XLR 4 connector is for connecting a headset to the PS 29 beltpack The impedance of the headset can must be minimum 200 ohms in case the headset has 2 cans in parallel the impedance of each can must be minimum 400 ohms Pin assignments Pin 1 shield mic GND Pin 2 mic Pin 3 phones Pin 4 phones As an option the PS 29 can be fitted with a XLR 5 headset connector allowing to hear channel A on the left headset can and channel B on the right headset can User Manual PS 29 Issue 2011 ASL Intercom BV INTERNAL CONTROLS MIC GAIN trimmer One has to open the PS 29 by removing the 4 screws at the underside The trimmer is situated on the lower PCB board To increase the gain turn clockwise To decrease the gain turn counter clockwise 80 SIDE PANEL CONNECTORS O 7 SIDE TONE trimmer channel A 8 SIDE TONE trimmer channel B With these trimmers one adjusts the level of your voice as you hear in your headset for each channel separately Adjustment procedure e Turn trimmer fully clockwise e Switch the microphones of all speaker stations connected to the referring party line channel off e Push the Talk button of the referring channel and turn up its listen level e Speak into the headset microphone e A
11. umber REV ia May Ll el 13 0 SYSTEM CONFIGURATION 2 CHANNEL INTERCOM NETWORK CONFIGURATION PAGE 6 User Manual PS 29 Issue 2011 ASL Intercom BV 14 0 EARTHING CONCEPT POWER SUPPLY Z1 Z2 Line Impedances L gt 30V 71 Mains Earth ii ji Wallbox EN IT I Sese E KKN 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 7 User Manual PS 29 Issue 2011 ASL Intercom BV
Download Pdf Manuals
Related Search