User Manual PS 260 [ASL]
Contents
1. EARTHING POINT Wallbox XLR 3 1 2 2 9 3 3 M9 4 Overall shield of multipair cable and or metal cable trunk EARTHING CONCEPT ASL INTERCOM PAGE 7 User Manual PS 260T Issue 2010 ASL Intercom BV 12 0 BLOCK DIAGRAM PS 260T TEST 1 AUDIO INPUT TEST GENERATOR INTERCOM LINE XLR PIN 3 XLR PIN 2 e XRPIN2 XLR PIN 1 m SUM OUTPUT CONNECTIONS OUT IN GND AUDIO OUTPUT XLR PIN 3 XLR PIN 2 E XLR PIN 1 o 13 0 POSSIBLE SYSTEM CONFIGURATION FK PS 19 PS 29 PS 19A PGM PS 230 PS 130 5 278 T 150 AUX PHONE TELEPHONE LINE CAMERA 1 CAMERA 2 POSSIBLE SYSTEM CONFIGURATION OF A 2 CHANNEL INTERCOM NETWORK PAGE 8 User Manual PS 260T Issue 2010 ASL Intercom BV2. clockwise e Activate the test tone generator e Minimize test tone level by turning the level trimmer anti clock wise e Minimize the remaining high frequencies of the test tone by turning the hi trimmer clockwise Repeat the two last mentioned procedures to obtain the lowest possible test tone levels The test tone is also heard by the users of the party line intercom which is rather disturbing ASL advises to not activate the test tone when the party line intercom system is in use Audio Lines II Intercom Line Audio Lines 7 The PS 260T contains two identical interface modules Each interface has the following rear panel connectors 7 AUDIO INPUT connector XLR 3 The input is transformer balanced Pin assignments Pin 1 OV ground shield Pin 2 signal Pin 3 signal 8 AUDIO OUTPUT connector XLR 3 The output is transformer balanced and capable of driving a 600 ohms load For pin assignments see 7 9 INTERCOM IN connector XLR 3 This connector is for connecting the intercom party line Pin assignments Pin 1 OV ground shield Pin 2 30 power wire Pin 3 audio wire 10 INTERCOM LINK connector XLR 3 This connector is for extending the intercom party line to other user stations or interface units For pin assignments see 9 PAGE 4 User Manual PS 260T Issue 2010 ASL Intercom BV 7 0 SUM OUTPUTS Each intercom line can be monitored via the audio output of each interface mod
3. ANALOG INTERCOM PS 260T DUAL CHANNEL AUDIO INTERFACE USER MANUAL Issue 2010 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 u l u 20 UNPAGKINQ u l u u u Nka MER VALIDUS 4 0 MECHANICAL 9 0 FRONT PANEL CONTROLS 6 0 REAR PANEL CONNECTORS TO SUMOUTPUT m 8 0 TECHNICAL SPECIFICATIONS 9 0 PARTY LINE TECHNICAL CONCEPTI 10 0 11 0 EARTHING CONCEP T 120 BLOCK DIAGRAM PS 2607 2 User Manual PS 260T Issue 2010 ASL Intercom BV 1 0 GENERAL DESCRIPTION The PS 2601 is designed to interface the party lines of the ASL intercom system to external audio equipment or 4 wire communication systems Applications may be Temporarily extending a fixed installed 4 wire intercom system with a portable ASL intercom set for use on location connecting an ASL intercom system to a 4 wire camera CCU injecting an external au
4. bjected 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 unitst or XLR 3 wall boxes oee 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 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 sou
5. cables PAGE 3 User Manual PS 260T Issue 2010 ASL Intercom BV 5 0 FRONT PANEL CONTROLS PS 260 Dual Channel Audio Interface 1 2 3 64 5 CHANNEL The PS 2601 contains two identical interface modules Each interface has the following front panel controls 1 POWER LED indicator This LED illuminates if line power is supplied by an ASL separate power supply or an ASL master station via the intercom party line 2 INPUT LEVEL control knob This knob controls the level of the audio input signal before it is placed on the intercom line 3 OUTPUT LEVEL control knob This knob controls the level of the intercom audio signal appearing at the output connector 4 SIDE TONE LEVEL trimmer This trimmer controls the input output separation 5 SIDE TONE HI trimmer This trimmer controls the input output separation in the high frequency range 6 SIDE TONE TEST knob This hidden push button activates a test tone generator which adds a 200 Hz tone to the audio input circuitry This to assist adjusting or checking the side tone trimmer settings 6 0 REAR PANEL CONNECTORS Serial Number Pro series Intercom The momentary push button can be reached with a pin or pen Side tone adjustment procedure e Connect a monitor amplifier speaker to the audio output e Turn up output level of the PS 260T to approx 50 e Bring the side tone trimmers in start position Level trimmer turn fully clockwise Hi trimmer turn fully anti
6. dio signal into an ASL intercom party line monitoring the audio of an ASL intercom party line by external equipment such as recorders or paging systems etc The PS 260T includes two separate and identical interface modules Each interface has its Intercom Line connectors and its Audio Line connectors input and output positioned on the rear of the PS 260T The electronic circuitry of each interface is powered by the 30V DC power supplied via the intercom party line The unbalanced signal on the audio wire of the ASL party line appears on the PS 260T audio output connector after being converted to a balanced signal The signals brought to the audio input connector are placed on the audio wire of the intercom line connector Two stage side tone trimmers avoid that audio input signals appear at the audio output connector The input output separation is better than 30 dB from 200 Hz to 20 kHz The built in test tone generator assists to adjust or check the side tone levels The audio inputs and audio outputs of the PS 260T are transformer balanced 2 0 UNPACKING The shipping carton contains the parts listed below 4 The PS 260T 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 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 peri
7. interface 1 with the middle tag of interface 2 Connect the left tag of interface 1 to the left tag of interface 2 Dimensions amp Weight width 19 483mm height 10 1 75 44 5mm depth 126mm weight 1565 grams Party Line Specifications supply voltage 30V DC 12V to 32V DC supply current 33 mA quiescent each audio line level 18 dBu to 0 dBu signal to noise 80dB station bridging impedance 150 kOhm 0 is defined as 775 mV into open circuit ASL reserves the right to alter specifications without prior notice PAGE 5 User Manual PS 260T Issue 2010 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 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 10 0 CABLING This principle has three advantages the use of a single audio line allows several stations to talk and listen simultane
8. od of one year from the date of shipment to the end user 4 0 MECHANICAL INSTALLATION To connect the PS 260T to an ASL party line intercom system and to external audio equipment or a 4 wire intercom system use professional flexible microphone cable with 2 wires and 1 shield only The party line cables are to be connected to the INTERCOM LINE connectors on the rear of the PS 260T The cables from to external audio equipment or of a 4 wire intercom system are to be connected to the AUDIO LINE connectors input amp output also on the rear of the PS 260T 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 so that a written claim can be initiated Please also refer to the warranty section of this manual 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 with shipping prepaid A note must be included stating the faults found and a copy of the original suppliers invoice There are no separate power connections to install since the necessary DC voltages are derived from the ASL party line The PS 260T is fully protected against wiring mistakes reverse power or short circuit in the interconnecting
9. ously e 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 e 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 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 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 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 su
10. rces 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 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 In case of more complex installations don t hesitate to contact us for advice User Manual PS 260T Issue 2010 ASL Intercom BV 11 0 EARTHING CONCEPT POWER SUPPLY 30V 21 22 Z1 Z2 Line Impedances Mains Earth 10R Cle Wallbox C XLR 3 n gd E d 2 n 3 ONLY ONE eS E Individual intercom line shield C not to be connected N with overall shielding
11. ule This the factory setting If required one interface module can monitor both intercom lines the intercom audio signals of both intercom lines appear on the audio output connector of that interface module To achieve this certain internal connections have to be made Depending on which output connection is required follow one of the procedures described below Procedure a Unscrew the upper cover plate and slide it backwards b Place the unit in front of you facing the front panel C d Screw the cover plate back in place OUTPUT OUTPUT LINES 1 2 LINE 2 OUTPUT OUTPUT LINE 1 LINES 1 2 Connection scheme A Function Output of interface 1 monitors intercom lines 1 2 Actions Connect the right tag of interface 2 with the middle tag of interface 1 Connect the left tag of interface 2 to the left tag of interface 1 8 0 TECHNICAL SPECIFICATIONS Intercom Line Driver Max output current 3 mA rms output impedance 150 Kohm Input Amplifier input impedance 600 ohm transformer balanced input level 30 dBu to 10 dBu frequency response 150 Hz 20 kHz 3 dB Output Amplifier output impedance 600 ohm transformer balanced maximum load 600 ohms max output level 20 dBu to 20 dBu frequency response 150 Hz 20 kHz 3 dB Side Tone Trimming Rejection better than 30 dB Connection scheme B Function Output of interface 2 monitors intercom lines 1 2 Actions Connect the right tag of
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