User Manual PS 150
Contents
1. cz LZ soouepeduy aul ZZ LZ 5 a IX User Manual PS 150 Issue 1 1994 ASL Intercom Utrecht Holland 10 User Manual PS 150 Issue 1 1994 ASL Intercom Utrecht Holland 112. A PRO SERIES USER MANUAL FOR THE PS 150 SINGLE CHANNEL TELEPHONE INTERFACE CONTENTS 1 0 GENERAL DESCRIPTION 2 0 UNPACKING 3 0 INSTALLATION 4 0 FRONT PANEL 5 5 0 REAR PANEL CONNECTORS 60 CABLING EE 7 0 PARTY LINE TECHNICAL CONCEPT 8 0 9 0 TECHNICAL SPECIFICATIONS User Manual PS 150 Issue 1 1994 ASL Intercom Utrecht Holland User Manual PS 150 Issue 1 1994 ASL Intercom Utrecht Holland 1 0 GENERAL DESCRIPTION The PS 150 is designed to interface the ASL intercom The PS 150 is a combination of two interfaces system 3 wire party line to the telephone system One for interfacing the intercom line to a separate input 2 wire and output and one for interfacing the telephone line to a For example communication can be realised between a separate input and output normal telephone and one or more ASL stations or These inputs and outputs are internally cross connected between two ASL systems via a telephone line The two stage sidetone circuit level hi allows you to The PS 150 is a sub station and receives power from the obtain an input output separation better than 30 d
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4. It indicates that the telephone line is occupied by the You can plug in a headset or headphones PS 150 Pin assignment 1 not connected 8 RECEIVE volume control knob 2 not connected This knob controls the listen level of the telephone line 3 phones signal as it is received by the intercomline 4 phones GND 9 SEND volume control knob This knob controls the listen level of the intercom line signal as it is send to the telephone line 6 CONNECT switch This switch connects the telephone line to either the telephone or to the telephone interface 10 POWER INDICATOR This LED illuminates if line power is supplied by the power supply or master station of the ASL intercom system in which the PS 150 is used If you switch the telephone line to the PS 150 the hold indicator illuminates If you have switched the telephone line from the telephone to the PS 150 you may place the telephone handset back on the hook because the PS 150 will hold the connection 5 0 REAR PANEL CONTROLS Telephone Serial Number Line Link In Phone Q gp Pro series Intercom 14 15 13 12 At the rear panel you will find the connectors for inter connecting the PS 150 within the ASL intercom system and within the telephone system The telephone line connection is transformer balanced 12 INTERCOM IN connector This XLR 3 is for connecting the intercomline Pin assignments 1 OV ground shield 2 30V power wire 3 audio wire 13 IN
5. B from intercom line 20Hz to 20 2 The built in testtone generator helps you to adjust or check the sidetone level at any time 2 0 UNPACKING The shipping carton contains the parts listed below PS 150 Set of telephone cables 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 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 guarantee section of this manual 3 0 MECHANICAL INSTALLATION The PS 150 will interface between ASL partyline 3 wire If your telephone system does not use the FCC type intercom and 2 wire telephone systems connectors we have applied on the PS 150 you can use these extra cables for interconnecting To connect the PS 150 with ASL partyline system use professional flexible microphone cable with 2 wires and 1 Connection procedure shield only Connect the partyline system cable into the 1 Lift the covers of the telephone line connector and the intercom line connector on the rear telephone plug which your system applies To connect the PS 150 with the 2 wire telephone system use the telephone cable to the FCC type connector on the 2 Use their connect
6. TERCOM LINK connector This output is for extending the intercom line to other sub stations It is linked to the intercom line input connector and has the same pin assignments 14 TELEPHONE LINE connector This connector is for connecting the telephone line Pin assignments not connected EB b a ground not connected O1 P The pin 3 and 4 of the telephone line connector are switched to pins 3 and 4 of the telephone connector when the PS 150 is off line HOLD led is off and switched to the interface when the PS 150 is on line HOLD led is lit 15 TELEPHONE connector This connector is for connecting a telephone a telephone bell or any other telephone apparatus Pin assignments see 14 The pins 2 and 5 of the telephone connector are always interconnected with pin 2 and 5 of the line connector User Manual PS 150 Issue 1 1994 ASL Intercom Utrecht Holland 7 0 CABLING For the PRO Series Intercom system the interconnecting cables are of the shielded two conductor microphone cable type and 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 Since the audio signal is transferred in an unbalanced way certain rules have to be obeyed when installing the cables of an intercom network This is to avoid earth loops and to minimi
7. ed in the power supply between XLR pin 3 and 1 a signal voltage is developed TELEPHONE LINE SIDETONE which can be further amplified and sent to headphones or rejection gt 10 dB 300 Hz 3 kHz loudspeakers TEST HEADSET This principle has three advantages impedance 4 2000 Ohms the use of a single audio line allows several stations to talk and listen simultaneously due to the high bridging impedance offered by each GENERAL SPECIFICATIONS station the number of stations on line has no supply voltage 30 VDC 12 V to 32 V influence on the level of the communications signal supply current 35 mA quiescent power and audio to the intercom stations use the same audio line level 18 dBm max 0 dBm cable signal to noise 80 dB station bridging impedance gt 150 The Call signal is also sent as a current on the audio line It develops a DC potential over the line impedance which dimension 483 x 44 x 124 mm will be sensed by each station and interpreted as a Call weight 2800 grams signal Note 0 dBu 775 mV into open circuit ASL reserve the right to alter specifications without further notice 9 0 GUARANTEE 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 the date of shipment to the end user Faults arising from misuse unauthorised modifications or accidents are not covered by this warranty I
8. f 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 THIS PRODUCT WAS DESIGNED DEVELOPED AND MANUFACTURED BY AMPCO SOUND LAB BV MAARSSEN UTRECHT HOLLAND User Manual PS 150 Issue 1 1994 ASL Intercom Utrecht Holland 7 TEST TEST GENERATOR 9 RECEIVE INPUT EXTENSION 4 XLR PIN 3 AC CURRENT SOURCE LL SIDETONE 9 E Y LINE TELEPHONE LINE 10 PN o o 8 p gt DA 0 V U PIN 3 PIN 2 SEND 600R od PINS 2 1 PIN 4 0 PIN 3 PIN 2 1 PIN4 o 7 XLR 4 e TELEPHONE PIN o LINE CONNECT PIN 7 HOLD INDICATOR lt y TEST HEADSET AMPCO SOUND LAB B V ZONNEBAAN 42 3606 CC MAARSSENBROEK UTRECHT HOLLAND ALL RIGHTS RESERVED Title BLOCK DIAGRAM PS 150 Size Document Number REV B Date October 25 1995 Sheet of User Manual PS 150 Issue 1 1994 ASL Intercom Utrecht Holland AIOMLAN V dO
9. ion of the intercom line interface It also compensates the resistance of the interconnecting cables For sidetone adjustment procedure see 4 4 2 SIDETONE HI trimmer This trimmer controls the internal input output separation in the high frequency range compensates the capacity of the interconnecting cables 3 SIDETONE TEST knob This hidden pushbutton switch activates a testtone generator which adds 200 2 tone to the internal input signal of the intercom line interface It allows you to adjust or check the sidetone trimmer settings of the intercom line interface Note Make sure you are not disturbing any communication because the test tone is placed on the intercomline which implies that all stations on that channel can hear the test tone 4 SIDETONE LEVEL trimmer TELEPHONE LINE This trimmer controls the internal input output separation of the telephone line interface The telephone line sidetone rejection may be rather poor compared to the intercomline sidetone rejection because of the complex impedance of the telephone line Because the PS 150 combines two interfaces a decrease of sidetone rejection in all intercom stations connected to the same channel as the PS 150 might occur If soeaker stations are connected internal feedback may occur If this problem arises it can be solved by keeping the send and receive levels of the PS 150 low and by turning the speaker attenuator trimmers of the howling speaker stat
10. ion s anti clockwise SIDETONE ADJUSTMENT PROCEDURE plug a headset in the test headset connector set receive level to minimum set send level to maximum set intercom line sidetone trimmers in start position level turn fully clockwise hi turn fully anti clockwise activate the testtone generator decrease testtone level by turning the level trimmer anti clockwise adjust for minimum level decrease the remaining high frequencies by turning the hi trimmer clockwise repeat the last three steps until you are sure you have obtained the best possible settings set telephone line sidetone trimmer in start position turn level trimmer fully clockwise connect an ASL sub station beltpack speaker station to the intercom channel and adjust its sidetone for minimal level connect the PS 150 to the telephone line and make connection with the front panel connect switch Turn up receive level slowly while speaking into the headset mike The volume of your voice will increase Turn telephone line sidetone level trimmer anti clockwise and adjust for minimum level User Manual PS 150 Issue 1 1994 ASL Intercom Utrecht Holland 4 0 FRONT PANEL CONTROLS 5 TEST HEADSET connector 7 HOLD indicator led This connector allows you to listen to the intercom line This led illuminates if you have switched the telephone during the sidetone adjustment procedure see 4 4 or line to the PS 150 continuously
11. ion screws for attaching the four rear leads coming from each cable following these colour assignments There are no separate power connections to install since yellow EB the necessary DC voltages are derived from the ASL green b partyline red a black ground The PS 150 is fully protected against mis wiring reverse power or short circuit in the interconnecting cables 3 Put the covers back in place User Manual PS 150 Issue 1 1994 ASL Intercom Utrecht Holland 4 0 FRONT PANEL CONTROLS _ 2 sidetone 150 Pro series s 4 Interface 7 SE I intercom The PS 150 is a combination of two interfaces One for interfacing the intercomline to a separate input and output and one for interfacing the telephone line to a separate input and output These inputs and outputs are internally cross connected Both interfaces have their own sidetone trimmers The two sidetone trimmers at the left side of the front panel control the internal input output separation of the intercom line interface The sidetone trimmer in the right of the front panel controls the internal input output separation of the telephone line interface For prevention of internal feedback or a hollow sound in both systems all sidetone trimmers must be adjusted care fully 1 SIDETONE LEVEL trimmer INTERCOM LINE This trimmer controls the internal input output separat
12. s isolated from other metal parts Metal housings for intercom cables and connectors should be mounted in such a way that they are isolated from other metal cable and connector housings and from any other metal construction parts See Party Line Technical Concept 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 multipair 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 All cable routes should have a star configuration with the central earthing point usually close to the power supply position as the centre of the star Keep cables away from electromagnetic sources Keep intercom cables away from high energy cables e g 110 220 380 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 trunking as energy cables Place power supplies in a central position In order to avoid unacceptable power losses place the power supplies as close as possible to where most power consumption occurs or in other words most user stations are placed Connect ASL power supply to clean mains ou
13. tlet The ASL power supply may be connected to the mains power outlet to which other audio equipment is connected Avoid using mains outlets which also power dimmer controlled lighting systems In case of more complex installations don t hesitate to contact us Please send us 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 150 Issue 1 1994 ASL Intercom Utrecht Holland 8 0 PARTY LINE TECHNICAL CONCEPT 10 0 TECHNICAL SPECIFICATIONS PS 150 ASL s PRO Series offers a complete two way full duplex INTERCOM LINE DRIVER communications system Max output current rms Users of the system are connected a party line output impedance gt 150 kOhm Master stations with built in power supply beltpacks speaker stations and power supplies are interconnected INTERCOM LINE SIDETONE via standard microphone cable One wire is used as an rejection gt 34 dB 20 Hz 20 kHz audio line one as a power line and the screen of the cable cable compensation 0 1000 meters functions as earth return TELEPHONE LINE DRIVER Current drive is used for signal transfer Each station Output impedance 600 Ohms utilises a current amplifier to amplify the microphone signal max output 14 to 34 dBm and place it on the common audio line where due to the freq response 150 Hz 6 KHhz 3 dB constant line impedance situat
14. ze power loss and the possible effect of electromagnetic fields These rules are Use high quality multipair cable For interconnecting user stations power supplies and accessories in an ASL Intercom network use high quality shielded two conductor minimum 2x 0 30 mm2 microphone cable only In case of a multi channel intercom network use high quality microphone multipair cable only each pair consisting of two conductors minimum 2x 0 15 mm2 with separate shield Multipair cable should also have an overall shield Use flexible cables Use flexible single and multipair microphone cable instead of cable with solid cores especially when the cable is subjected to bending during operation or installation Separate cable screen to XLR pin 1 The screen of each separate microphone cable and or the screen of each single pair in a multipair cable should be connected to pin 1 of each XLR 3 connector Do not connect this cable screen to the metal housing of the connector or to metal wall boxes outlets See page 10 for Earthing Concept Cable trunks connection boxes and overall multipair cable screen to clean earth Metal cable trunks metal connection boxes and overall multipair cable screen should be interconnected and at one point the central earthing point in the intercom network only be connected to a clean safety earth See page 10 for Earthing Concept Keep metal connection boxes and cable trunk
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