PS 19M SINGLE CHANNEL BELTPACK USER MANUAL
Contents
1. ANALOG INTERCOM PS 19M SINGLE CHANNEL BELTPACK 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 GENERAL DESG ee 20 UNPACKING ____________ 30 INSTALLATION ae bd WARRANTY 5 0 FRONT PANEL 5 2 2 2 2 2 4 4 6 0 REAR PANEL 5 70 BOTTOM PANEL 5 4 424 24 22 8 0 TECHNICAL SPECIFICATIONS PS 19 GADING a aana er eee ee ga p at past eee ee 10 0 PARTY LINE TECHNICAL CONCEPT 11 0 BLOCK DIAGRAM PS TIM isit 12 0 SYSTEM 2 2 2 2 22 150 EARTHING CONCEPT sasap kenapa aan ang na aga pa ee naga aa ab ee PAGE 1 User Manual PS 19M Issue 2011 ASL Intercom BV 1 0 GENERAL DESCRIPTION The PS 19M is a portable single channel intercom station It is housed in a strong metal case provided with a steel belt clip On the front panel are a Volume listen level control TALK and CALL push but2. er station or power supply After the CALL button is released the LED s continue to flash for a further 2 seconds 4 Talk LED green 5 Call LED red Pin assignments Pin 1 OV ground shield Pin 2 30V DC power wire Pin 3 audio wire 7 HEADSET connector This XLR 4 connector is for connecting a headset to the 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 User Manual PS 19M Issue 2011 ASL Intercom BV 7 0 BOTTOM PANEL CONTROLS 8 SIDE TONE trimmer This trimmer adjusts the level of one s own voice in one s own headset Adjustment procedure Set trimmer start position turn fully clockwise e Switch the microphones of all speaker stations connected to the party line off 8 0 TECHNICAL SPECIFICATIONS PS 19M System Dynamic range 80 dB 1 kHz THD 1 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 Intercom party line Impedance 350 1 KHz 2 2 DC Audio level nom 18 dBu max 4 dBu Mic pre amp Headset mic impedance 200 Gain 40 60 dB adjustable internally Presence filter 6 dB at 5 kHz Frequency response 200 2 15 kHz 3 dB Power to electret
3. ercom 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 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 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 2 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 see section Earthing Concept Connect metal cable trunks wall boxes and overall multi pair cable screens to c
4. 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 station and interpreted as a Call signal 11 0 BLOCK DIAGRAM PS 19M ELECTRONIC TALK SWITCH ISM MIC MUTE PS MIC MUTE MICROPHONE MIC GAIN MIC PREAMP 29 24 0042 CURRENT SOURCE LISTEN VOLUME CURRENT SOURCE ni de BUZZER VOLUME Uref BUZZER BUZZER DELAY GENERATOR al R BUZZE 12 0 SYSTEM CONFIGURATION 2 CHANNEL INTERCOM NETWORK CONFIGURATION PAGE 6 User Manual PS 19M Issue 2011 ASL Intercom BV 13 0 EARTHING CONCEPT POWER SUPPLY 21 22 Line impedances gt gt 21 Mains Earth cF Wallbox Aw A 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 19 Issue 2011 ASL Intercom BV
5. lean 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 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 power supply In order to diminish power losses place the power supp
6. ly 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 10 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 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 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 power and audio to the
7. mic 9V DC Headphone Driver Amps Max output level 14 Vrms 200 Q Max output power 2x 0 28 Wrms 400 0 Push the PS 19M TALK button Turn up the listen volume Speak into the headset microphone Adjust the listen level by turning the side tone trimmer The operating area of the trimmer 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 party line 9 MIC GAIN trimmer By this trimmer the mic gain is adjusted To increase the gain turn clockwise and to decrease the gain turn counter clockwise 10 BUZZER VOLUME trimmer This trimmer adjusts the volume of the internal buzzer The buzzer is activated when the CALL button on this beltpack or on any other intercom station connected to the party line is pushed longer than 2 seconds provided the buzzers are not muted by a Buzzer Mute signal received from a Pro Series master station or power supply Side Tone Rejection 0 30 dB adjustable Buzzer Max SPL 85 dBA PS 19M Power Consumption Current at 30V DC 30 mA quiescent 45 mA signalling 170 mA at max output signaling PS 19M Dimensions amp Weight Width 90 mm Height 48 mm incl clip Depth 124 mm Weight 400 grams dB 15 defined as 775 mV into open circuit ASL reserves the right to alter specifications without prior notice User Manual PS 19M Issue 2011 ASL Intercom BV 9 0 CABLING The int
8. onds activates the Call sound signal The volume of this sound signal the buzzer can be adjusted at the front panel Fully electronic switching increases reliability and allows for soft microphone On switching latched 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 lf 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 19M to the intercom system use professional flexible microphone cable with 2 wires and 1 shield only Connect this cable to the LINE connector on the rear panel The PS 19M is fully protected against wiring mistakes reverse power or short circuit in the interconnecting cables Faults arising from misuse unauthorized modifications or accidents 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 shipping costs prepaid A note must be included stating the fault s found and a copy of the original suppliers invoice User Manual PS 19M Issue 2011 ASL Intercom BV 5 0 FRONT PANEL CONTROLS 1 VOLUME control knob With this knob the listen level for the headset is adjusted 2 TALK button By pushing this button
9. the signal of the headset microphone 15 sent to the intercom party line When the TALK button is switched On its large green LED is lit Momentary switching When the TALK button is pushed and held the microphone signal is sent to the intercom channel until the button is released Latched switching When the TALK button is pushed shortly it is electronically latched and the microphone signal is sent to the intercom channel When pushed again the TALK button switches Off 6 0 REAR PANEL CONNECTORS 6 LINE connectors These XLR 3 connectors are for connecting the intercom party line The female connector is for input and the male connector for extending the intercom party line to other stations daisy chain 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 button By pushing this button the Call function is activated With a momentary push a Call signal is sent to all stations connected to the intercom party line The Call LED s of this beltpack and of all stations on the party line start flashing By pushing the Call button for 2 seconds the Call Buzzers are activated provided the buzzers are not muted by a Buzzer Mute signal received from a Pro Series mast
10. ton with LED indicators On the bottom panel are a side tone trimmer a mic gain trimmer and a buzzer volume trimmer On the rear panel are XLR 3 connectors for the intercom connection cable the party line and an XLR 4 headset connector Special attention has been paid to the intelligibility of soeech By applying low noise high speed op amps a speech presence filter and propriety high power bridged headphone amplifiers communication is very comfortable 2 0 UNPACKING The shipping carton contains the PS 19M 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 19M 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 cable 40 WARRANTY This unit is warranted by ASL to the original 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 even in environments with a high level of background noise The unique ASL call system provides both a flashing 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 sec
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