Guardian Manuals - Guardian Telecom Inc.
Contents
1. 1 2 and 3 are on one adjustment Remove the TBA enclosure top panel by unfastening the six screws retain the screws and panel Once the top panel has been removed access to 120 volts AC is provided therefore the service personnel should be qualified to work with electrical equipment 9 1 Initial Settings These settings are to be done before powering the TBA on for the first time If previous adjustments have been made note the front panel adjustment positions or mark them on the internal PWBA potentiometers Refer to Figure 15 Adjustment Locations for the locations of the following adjustments Adjust these potentiometers to the 50 rotation point Central Station Volume R11 Monitored Station Volume R141 Station 1 Volume R47 Station 2 Volume R79 Station 3 Volume R110 Central Station Volume Microphone R183 Stations 1 to 3 and Monitored Station Volume Microphone R184 Ring Volume R186 As well the following settings are to be done Adjust Central Station Attenuation R12 to fully counterclockwise JP1 to Ring Enable JP2 to nearest pair to R180 J21 jumper on 1 to 2 CENTRAL RELAY J21 jumper on 5 to 6 MONITORED RELAY J21 jumper on 9 to 10 STN 1 RELAY J21 jumper on 13 to 14 STN 2 RELAY J21 jumper on 17 to 18 STN 3 RELAY Verify the jumpers on J21 are only those shown above unless special instructions are given for RINGING settings Page 19 Guardian2. Ringer output with a jumper on 421 at the RINGING position for that station As all of the stations PTT input circuitry locations are populated on the PCBA it is possible to add extra Ringer Switches at unused station PTT locations without affecting the operation of the Talk Back Amplifier system To prevent the RINGER switch from interfering with normal PTT action when it being used as a Ringer remove the jumper on 421 for RELAY on any position used as a RINGER input 9 12 Replace the TBA enclosure top panel Turn the AC Power Switch to OFF Mark the potentiometer positions with a marker on the PWBA mounted adjustments Note the front panel Volume control positions or numbers for future use Replace the TBA enclosure top panel using the six screws removed earlier 10 Locations of adjustments for the TBA The sketch below gives the approximate locations of the adjustments for the TBA These adjustment locations are also labeled on the TBA STATION 3 STATION 2 STATION 1 MONITORED CENTRAL VOLUME VOLUME VOLUME VOLUME VOLUME R183 R184 R186 R179 Bip TBA 50 ADJUSTMENTS Figure 15 Adjustment Locations 10 1 Audio transformer tap adjustments The audio output transformers are all connected with 0 and 8 Ohms on the input and COM and 325 Ohms on the output for normal operation If these positions are changed mark the transformer top with a large label to caution other installers that these are not
3. Feedback cau DE 24 18 Guardian Product eL a 25 Figures Figure 1 Table of TBA IMOGEIS 2 Pet ee Le eei gol 4 Figure 2 TBA 41 Front Panel 5 Figure TBA 41 Rear Panel 5 Figure 4 TBA Enclosure Inside Front 6 Figure 5 TBA Enclosure Inside Rear 6 Figure 6 TBA External Audio Connections 11 Figure 7 TBA Internal Audio Connections 12 Figure 8 TBA 33 Internal Audio Connections to 2011 13 Figure 9 TBA 33 Internal Transformer Wiring Pre 2011 14 Figure 10 TBA 33 Internal Audio Connections Starting 2012 15 Figure 11 TBA 33 Internal Transformer Connections 16 Figure 12 Station Connector Wiring 17 Figure 13 Central Station Microphone Wiring 17 Figure 14 Central Station Speaker Wiring 18 Figure 15 Adjustment Locations 21 Package Contents 1 TBA Talk Back Amplifier 1 Loudspeaker Additional Loudspeakers optional up to four 1 Optional Central Station Microphone except for model TBA 22 1 Installation amp Operation Manual Acrony
4. Models The connections for the TBA 33 PWBAS starting in 2012 are shown below Note that the value of R161 is 10 Ohm and 166 is 1 0 Ohm to reduce the input gain to telephone line levels The transformer on the Central Station output is a 600 to 10K Ohm transformer to raise the impedance from 8 Ohms to 150 Ohms in order to be closer to the impedance of a microphone input to a telephone line adaptor module TBA 33 INTERCONNECTIONS STARTING 2012 Audio to 4 _ sec a 5 JE ww g 2 pa 10sec c g jumper 07 cn Telephone FWD AFT Telephone P 140VAC System Interface Speaker Speaker Figure 10 TBA 33 Internal Audio Connections Starting 2012 Page 15 Guardian Telecom Inc Installation amp Operation TBA Models TBA 33 INTERCONNECTIONS somera TO INTERNAL TRANSFORMERS TREE STARTING 2012 10 ohm 1 amp 3 on TBA pins 3 and 4 70 Output I5 VOLT VOLT reduced to 0 25 TRANS TRANS by transformer AF RM XF RM Audio to J Audio ta FRM from Figure 11 TBA 33 Internal Transformer Connections Starting 2012 Page 16 Guardian Telecom Inc Installation amp Operation TBA Models MONITORED 1 2 amp 3 STATION CONNECTORS TBA PCBA VIEWED FROM BOARD EDGE ul gt ul gt 4 xo 0 8 Ez 85 OT of cL a QU gt uz BALANCED INPUT amp OU
5. Telecom Inc Installation amp Operation TBA Models 9 2 Powering ON the TBA Turn the AC power switch on the back panel to ON Verify that the Go Ahead tone is heard briefly on all of the speakers attached 9 3 Monitored Station Microphone Volume Adjustment Monitored Station Volume Microphone R184 adjustment is done while listening to the output of the audio on the speaker for another station With a sound source that is expected to be near the maximum level adjust R184 so that the sound is just starting to be distorted Alternatively adjust R184 so the signal on J15 pin 1 is at 0 1 volts RMS with a normal voice level Alternatively adjust R184 so that it is at 2596 of the rotation clockwise 9 4 Central Station Microphone Volume Adjustment Press the Central Station PTT switch Adjust the Central Station Volume Microphone R183 Adjustment is done while listening to the output of the audio on the speaker for another station With a sound source that is expected to be near the maximum level adjust R183 so that the sound is just starting to be distorted Alternatively adjust R183 so the signal on J15 pin 1 is at 0 1 volts RMS with a normal voice Alternatively adjust R183 so that it is at 5096 of the rotation clockwise 9 5 Ringer Volume Adjustment Press the Monitored Station PTT switch Adjust the Ring Volume R186 to have a ringing signal that is loud enough but does not distort Alternatively adjust R186 so the
6. lt gt Guardian Telecom CONNECTED PROTECTED Talk Back Intercom System Model TBA Installation amp Operation MULTI CHANNEL TALK BACK AMPLIFIER POWER ON OFF CENTRAL STATION STATION 1 STATION 2 STATION 3 SPEAKER VOLUME SPEAKER VOLUME SPEAKER VOLUME SPEAKER VOLUME Gu rdian Telecom Inc P007143 Rev D 150824 8 24 2015 11 32 AM Ph 403 258 3100 email info quardiantelecom com 1 www guardiantelecom com Guardian Telecom Inc Installation Contents 4 2 CODE ER EN EE 4 Identification of equipment 4 34 TBA Model u u Sul u u uu uu Sa 4 3 2 MBA CON PANE L ha astay 5 dioe ESATO AN PC ca u oe 5 34 TBA Erclosure lfislde ss ns tee eite E 6 A System OVERVIEW tingere 41 Central cis 7 42 Monitored SAONE uy a SR a cee eri esses 7 4 3 Stations 1 2 8 3 iii 7 44 PE AGUONS tesi 8 45 Alervor Go Ahead TONG a tol lao 8 4 6 Applications on Drilling RIJS 8 4 7 Applications on Shipboard 8 D APPICGUOR eslrictllollS riadas 8 Installation 9 Ol IBA ENCIOS erase 9 2 ARS UPP Yta o e 9 290 MAS ON yu u u u u u uuu uuu neues 9 62 2 ODIOFIS 9 6 9 Pushto Talk S
7. sounds similar to a telephone ringing This dual tone Ringing is generated for two purposes e Alert Go Ahead The Alert Tone or Ringing is caused by the Monitored Station pushing the Push to Talk PTT switch The Go Ahead short Ringing is a 0 1 second long sound burst that indicates to the users that a PTT switch has just been released on the Central Station or Station 1 2 or 3 This Go Ahead indicates that the other station has ceased pressing the PTT switch and that normal operation can be resumed When this post announcement short Ringing tone is heard it confirms to the listener that the system is in the receive mode Jumper JP1 on the Printed Circuit Board Assembly PCBA is a switch to allow the injection of the post PTT Go Ahead or short Ringing tone Moving JP1 to the bottom set of terminals will disable the Go Ahead or short Ringing tone 4 6 Applications on Drilling Rigs In drilling rig applications the TBA normally consists of e Central Station at the doghouse with a speaker and microphone Monitored Station at the monkey board e Station 1 2 and 3 as needed The monkey board or racking board for the derrick man is up on the drilling rig tower and the derrick man s instructions to the dog house driller s communication shack should be continuously monitored 4 7 Applications on Shipboard Audio monitoring of the wheelhouse or control station can be used to inform the engine ro
8. supply you with an RMA return materials authorization number over the telephone or through our web site product return page This number must be included with your return address and the name of the person to contact Guardian Telecom Inc Toll free 1 800 363 8010 Ph 403 258 3100 Fax 403 253 4967 www guardiantelecom com 17 Feedback Guardian Telecom continually strives to make reliable durable and easy to use products If you as an installer or user of our equipment have any suggestions for improvements to this or any of our products or documents including this manual we would appreciate hearing from you Page 24 Guardian Telecom Inc Installation amp Operation TBA Models 18 Guardian Product Return Guardian products have been quality tested and are in full working order when shipped from the factory given the rugged nature of these products shipping is not expected to damage a unit In the unlikely event of a malfunction Guardian follows the three step procedure below Step I On Site Correction The most common source of difficulties with a new product is improper installation in one of two ways incorrect wiring connections or connection to an incorrect power source Product wiring needs to be properly connected to the on site wiring Correct wiring instructions are shown in the user manual included with the product Step II Return Materials Authorization RMA When a product has been installed following u
9. 22 pin 1 to 2 is removed The negative ground connection is available at J22 pin 3 If this option is used the internal transformer for 8 to 325 Ohms is to be removed and the amplifier will drive the 70 volt line directly Note that the DC supply generated within the TBA is floating with respect to the chassis ground Verify that the negative at J22 pin 3 PWBA ground has a low voltage and low audio frequency noise with respect to chassis ground if there is noise present on the Talk Back Amplifier system Page 9 Guardian Telecom Inc Installation amp Operation TBA Models 6 3 Push to Talk Switches The Talk Back Amplifier has a 24 volt resistive connection to Push to Talk PTT switches The use of gold or silver plated switch contacts within an environmentally sealed housing is recommended for long term reliability The switches will conduct about 0 5 milliamp when pressed and have 24 volts across the terminals when not pressed Each of these connections should be evaluated separately for safety 6 4 Microphone For all of the models except the TBA 33 the microphone input is terminated with a low impedance of less than 10 Ohms at 1 KHz when the Central Station PTT is not pressed The TBA 33 has a 1K Ohm impedance across its terminals when the Central Station PTT is not pressed There is no DC supply or bias applied to the microphone line pair as the microphone input is optimized for a dynamic microphone The level on the microp
10. 3 are connected in the same manner as the Monitored Station shown below Figure 7 TBA Internal Audio Connections Page 12 Guardian Telecom Inc Installation amp Operation TBA Models 8 TBA 33 Configuration The connections for the TBA 33 PWBAs before 2012 are shown below The 8 Ohm to 325 Ohm transformer is called a 70 volt transformer and it connects between the output amplifier and the speaker TBA 33 INTERCONNECTIONS DATED 2011 TBA 33 L3 internal connectors 2 03 E 3 8 D I E S 1sec E E jumper D 2 alo m Xx D 1Usec 1 aq Un jumper a Telephone Telephone System Interface Figure 8 TBA 33 Internal Audio Connections Pre 2012 Page 13 Guardian Telecom Inc Installation amp Operation TBA Models TBA 33 INTERCONNECTIONS 00 om TO INTERNAL TRANSFORMERS on TBA outputs DAT ED 201 1 pins 1 and 10 Kohm 1 amp 3 an TEA pins 3 and 4 Output is Bw 600 TO VOLT VOLT reduced to 0 25 T by transformer Pins 1 2 a AF Rv Pins 6 47 Audio fram Audio fram Audio to AFRM ta 1 5 volt MU 1 and TuF bm P DDSZ7 in seres across pins b to 4 on 170M Hammond transformer 10 Kohm on output tram transformer to TEA Figure 9 TBA 33 Internal Transformer Connections Pre 2012 Page 14 Guardian Telecom Inc Installation amp Operation TBA
11. ARY ALBERTA 8607 11G001 MADE CANADA ER FUSE 1A 250V SLO BLO 724 I CENTRAL STATION STATION 1 STATION 2 STATION 3 SPEAKER PTT amp MIC SPEAKER amp PTT SW SPEAKER amp PTT SW SPEAKER amp PTT SW 2 110VAC e Figure 3 TBA 41 Rear Panel Page 5 Guardian Telecom Inc Installation amp Operation TBA Models 3 4 TBA Enclosure Inside The photos below show the TBA 50 with the top cover removed Figure 5 TBA Enclosure Inside Rear Page 6 Guardian Telecom Inc Installation amp Operation TBA Models 4 System Overview The Talk Back Amplifier TBA is so named because of the ability for the user to talk back to the speakers instead of using a separate microphone to talk back The model TBA is an intercom system designed for use in situations where frequent communications between two or more stations are required The TBA system utilizes speakers in two modes e as a speaker output to broadcast audio messages from other stations e lt an audio microphone to pick up audio messages 4 1 Central Station The Central Station speaker normally outputs audio coming from the Monitored Station The audio from the Monitored Station or Stations 1 2 or 3 with their PTT depressed will be output on the Central Station speaker To output audio the Central Station user presses the Press to Talk PTT switch The Central Station PTT switch is normally mounted on
12. TPUT lt 29 2 8 5 LO WATTS SPEAKER Y GROUND CONNECTION PIN 4 I POSITIVE AND PIN 5 15 NEGATIVE WITH 23V OPEN AND USE 4 WIRE SHIELDED CABLE 2 SMA CLOSED NO GROUND CONNECTION Figure 12 Station Connector Wiring CENTRAL STATION MICROPHONE VIEWED FROM BOARD EDGE TOP OF 2 mad 66 lt 2 d pn T a A ec E Q S a 33 85 gt 5 9 an g BALANCED DYNAMIC MICROPHONE INPUT PIN 4 15 POSITIVE ANO AT 54 dB AT NOMINAL VOICE PIN 5 15 NEGATIVE NO GROUND CONNECTION ui Figure 13 Central Station Microphone Wiring Page 17 Guardian Telecom Inc Installation amp Operation TBA Models CENTRAL STATION SPEAKER TBA PCBA VIEWED FROM BOARD EDGE TOP OF TBA ei ec a SZ s q 28 22 lt 2 9 yA A Or ocx a FO FY x 4 TE lt en ns Ss BALANCEO OUTPUT a JA 36 TO OHMS 10 WATTS SPEAKER a a NO GROUND CONNECTION PIN 4 IS POSITIVE AND PINS 15 NEGATIVE WITH 24V OPEN AND USE 4 WIRE SHIELDED CABLE 25 MACLOSED NO GROUND CONNECTION Figure 14 Central Station Speaker Wiring Page 18 Guardian Telecom Inc Installation amp Operation TBA Models 9 Installation Adjustments e The speaker outputs levels are each individually adjustable e The gain for the Central Station microphone is adjustable e The gain for the Monitored Station Station
13. WICh S sin u unun uuu edema 10 GA OMICIODOONE ete 10 DD 555 5 mmm 10 TBA Configurations except for 33 11 9 TBA3393 COMU ON a 13 9 Installation Adjustments 19 AA 19 9 2 POWETAOON he uru u dida 20 9 3 Monitored Station Microphone Volume Adjustment 20 9 4 Central Station Microphone Volume Adjustment 20 9 5 Ringer Volume Adjustment rara 20 9 6 Central Station Speaker Volume 20 9 7 Station 1 Speaker Volume 20 9 8 Station 2 Speaker Volume 20 9 9 Station 3 Speaker Volume 20 9 10 Optional Hum Cancellation 20 9 11 Optional ringing Trom PT 6 u uu meando 21 9 12 Replace the TBA enclosure top panel 21 10 Locations of adjustments for the 21 10 1 Audio transformer tap adjustments 21 113 Product Speo CalloRis se 22252420 08815420 5 22 amp Operation TBA Models Guardian Telecom Inc Installation 12 Replacement n a 23 T3 MM GIT GLY ata 24 14 40186181 a ates AE E 24 19 VV GM Oci TT 24 16 Service Telephone Number 1 800 363 8010 24 17
14. fields especially from a 60 Hz transformer nearby Ensure that the speakers and transformers are separated from AC supply transformers and other sources of magnetic fields The connection to the speaker is a two wire shielded cable with the shield terminated at the TBA enclosure only Ensure the speaker cable is not routed near a source of interference such as a generator high voltage cable or AC supply transformer Each of these connections should be evaluated separately for safety Page 10 Guardian Telecom Inc Installation amp Operation TBA Models 7 TBA Configurations except for TBA 33 The external and internal connections for the TBA s audio connections are shown in block form below Note that the connections of Stn 1 2 and 3 are the same as for the Monitored Mon station Stations 1 2 and 3 are connected in the same manner as the Monitored Station shown below T i 15 E 8 al HE LH z SES lt 21 lt Central Station Speaker 110VAC Figure 6 TBA External Audio Connections Page 11 Guardian Telecom Inc Installation amp Operation TBA Models TBA INTERCONNECTIONS TO INTERNAL TRANSFORMERS FO FO FO VOLT VOL VOLT TRANS IRANS TRANS TE lle m irs LL Ez Sek EX SK SK SF T lt T The 8 Ohm to 325 Ohm transformer is called a 70 volt transformer and it connects between the output amplifier and the speaker Stations 1 2 and
15. hone is 80 dB reference 1 volt per bar 0 1 millivolt per bar This is 0 1 millivolt from 150 Ohms series impedance with a 94 dB SPL activation EIA sensitivity is 152 dB The Telex 785L is one microphone type that meets this specification The connection to the microphone is a two wire shielded cable with the shield terminated at the TBA enclosure only Ensure the microphone cable is not routed near a source of interference such as a generator high voltage cable or AC supply transformer Each of these connections should be evaluated separately for safety 6 5 Speaker The Talk Back Amplifier has a 10 watt at 325 ohm audio output to the speakers This is also known as a 70 volt intercom system The speakers used should be transformer coupled to the acoustic transducer The acoustic transducer may be a cone type speaker or a compression driver with an expansion cone The compression driver type of speaker is about 6 dB more efficient than a cone speaker for sound input to electrical output when it used as a microphone The speaker on the Monitored Station and Stations 1 2 and 3 are used as audio input devices The level of audio from these speakers is near 1 millivolt for 94 dB SPL at 1 foot from the front of the speakers Different types of speakers will have different sensitivities and the user must evaluate the performance of the speaker when at the location The transformer on the speaker is capable of picking up surrounding magnetic
16. ms TBA Talk Back Amplifier PWB Printed Wiring Board PWBA Printed Wiring Board Assembly AC Alternating Current DC Direct Current KHz Thousand Hertz Hz Cycles per second Page 3 amp Operation TBA Models Guardian Telecom Inc Installation amp Operation TBA Models 1 Purpose This document is provided to assist in the electrical installation and operation of a Talk Back Amplifier TBA as produced by Guardian Telecom Inc 2 Scope The installation information will consist of connections to the TBA unit in the enclosure The connections to external speakers and microphones are covered in their respective manuals The operation information will consist of adjustment of potentiometers and power supply requirements for the TBA unit Some information for the speaker and microphone sensitivity that relates to the TBA operation will be given to assist in the selection and installation of TBA peripherals 3 Identification of equipment There are several models of Guardian Talk Back Amplifiers TBA The Printed Wiring Board Assembly PWBA in the TBA will support up to five speaker outputs therefore the listing of equipment goes from five speaker outputs to two speaker outputs 3 1 TBA Model Numbering The table below uses CEN for Central Station MON for Monitored Station and 1 to 3 for Stations 1 to 3 The in a square indicates that the speaker amplifier is populated on the PWBA The L indicates low impeda
17. n five working days Page 25 Guardian Telecom Inc Installation amp Operation TBA Models Notes Page 26 THIS PAGE INTENTIONALLY LEFT BLANK 180 9001 Guardian Telecom Inc Toll free 1 800 363 8010 Phone 403 258 3100 Fax 403 253 4967 www guardiantelecom com E mail sales guardiantelecom com CONNECTED PROTECTED Guardian Telecom Inc 2015
18. n speaker will output the audio coming from another station if the other station presses a PTT switch When the Monitored Station speaker is outputting audio it does not send audio to the other stations The Monitored Station speaker will change from a microphone input into a speaker output when the Central Station or another station has the PTT switch pressed 4 3 Stations 1 2 and 3 The Stations 1 2 and 3 have a speaker and a PTT switch The audio from the Monitored Station or any other station with a PTT depressed will be output on that station s speaker When the station s PTT switch is depressed the station will output audio to the other stations When the speaker is outputting audio it does not receive audio from the other stations Page 7 Guardian Telecom Inc Installation amp Operation TBA Models 4 4 PTT Actions The Central Station Push to Talk PTT switch has the highest priority in using PTT When the PTT is pressed on the Monitored or Stations 1 2 or 3 the stations are a first come first served basis for PTT When the PTT switch on the Monitored Station is pressed the other speakers on the system will output a ringing tone for as long as the PTT is pressed When the PTT switch on the Central Station Stations 1 2 or 3 is pressed the system will use the speaker on that station to generate audio for the other station speakers 4 5 Alert or Go Ahead Tone The Talk Back Amplifier TBA has a tone generator that
19. nce and the indicates high impedance ca HELLE Figure 1 Table of TBA Models Note The Central Station input for the microphone on TBA 33 is modified to have an impedance of near 1K Ohm when the PTT is not pressed See the section titled Microphone for further information Page 4 Guardian Telecom Inc Installation amp Operation TBA Models 3 2 TBA Front Panel The TBA Front Panel of the enclosure has from two to five volume controls and a power indicator The power indicator shows the presence of AC power and is a green illumination if AC is present The volume controls are labeled for the Station being controlled Clockwise rotation gives more volume the volume controls have numbers from1 to 10 to assist in setting repeatability MULTI CHANNEL TALK BACK AMPLIFIER CENTRAL STATION STATION 1 STATION 2 STATION 3 SPEAKER VOLUME SPEAKER VOLUME SPEAKER VOLUME SPEAKER VOLUME Figure 2 TBA 41 Front Panel 3 3 Rear Panel The TBA Rear Panel of the enclosure has from two to five cable entries an AC power connector an AC fuse and a Power ON OFF switch The AC power connector is a standard connector for AC supplies The AC fuse is a 1 amp slow blow 250 volt fuse of 1 25 long and 0 25 diameter Buss fuse type MDL 1A is supplied with the TBA The POWER ON OFF switch is a rocker switch pushing the switch upwards turns on the TBA Guardian TALK BACK AMPLIFIER AUDIO MODEL MAA OALG
20. om and other stations of the actions needed to be performed In this way commands for ship operation can be communicated without delay by the ship operator simply speaking The telephone intercom on board the ship is connected to a special impedance of the Central Station made for the 600 Ohm telephone system A PTT from the telephone line is used to activate the output to the talk back speakers both FORE and AFT After the PTT the FORE and AFT can reply back to the telephone system by talking to the speakers The period for the FORE and AFT stations to talk back after a PTT is received from the telephone interface is selected by a jumper on Monitored Station PTT for 1 minute or a jumper on Station 1 PTT for 10 minutes 5 Application Restrictions The Talk Back Amplifier TBA enclosure is not approved for use in hazardous areas The Central Station console microphone as supplied is not approved for use in hazardous areas A microphone may be used in hazardous areas if it is connected through an approved intrinsically safe barrier Page 8 Guardian Telecom Inc Installation amp Operation TBA Models The Push to Talk PTT switches may be of a suitable rating for use in hazardous areas or connected through an approved intrinsically safe barrier Any application of equipment into a hazardous area must be approved by the appropriate authority The speakers used may be of a suitable rating for use in hazardous areas The speakers used with
21. rs must be made at Guardian Telecom or an authorized service depot Guardian Telecom is not responsible for costs incurred for on site service calls freight or brokerage A return authorization must be obtained prior to warranty claims or repairs 14 Disclaimer The products covered by this manual are designed for use in Industrial Environments and or Hazardous Locations Due to the range of possible applications for these instruments the manufacturer will not be responsible for damages or losses of any kind suffered as a result of the use of this product including consequential damages 15 Warning This device may be opened and reassembled by qualified personnel only for the purposes of installing the product making adjustments and replacing components following the instructions in the product manual High voltages may be present in this product when connected to system wiring 16 Service Telephone Number 1 800 363 8010 Guardian Telecom provides a customer service telephone number which is toll free within North America If you need assistance when installing or operating this product please call the toll free telephone number between regular business hours 8 00AM 5 00PM Mountain Standard Time If you are calling outside of regular business hours please leave a detailed message and a member of Guardian Telecom s Service Department will return your call as soon as possible If your product requires service Guardian personnel will
22. ser manual instructions and the unit fails to operate the user must contact Guardian Telecom to obtain authorization to return the product This can be done by completing a RMA form online at www guardiantelecom com or by calling the service telephone number given in this manual After providing information on the product the owner and the nature of the problem Guardian will issue a RMA number to be shown on documentation returned with the product In addition to the RMA number shipping documents should include name address and telephone number of the owner along with contact information for the person responsible for the repair and or the user who identified the malfunction Where a product is being returned for repair from outside of Canada customs documentation must show the product s serial number date of export date of purchase and a notation that the equipment is Canadian goods returning Step Ill Factory Authorized Service Once received each product is carefully inspected and tested If the product is under warranty repairs are completed and the product returned to the owner generally within five working days of receipt by the factory A product that has been subjected to misuse neglect or accident or is beyond the warranty period will be evaluated The service department will provide the owner s representative with a repair cost estimate Once approved repairs are completed and the product returned generally withi
23. signal on J15 pin 1 is at 0 2 volts RMS Alternatively adjust R186 so that it is at 5096 of the rotation clockwise 9 6 Central Station Speaker Volume Adjust Central Station Volume R11 so that the voice from the Monitored Station is at a comfortable level for the Central Station operator 9 7 Station 1 Speaker Volume Adjust Station 1 Volume R47 so that the voice from the Monitored Station is at a comfortable level for the Station 1 operator 9 8 Station Z2 Speaker Volume Adjust Station 2 R79 so that the voice from the Monitored Station is at a comfortable level for the Central Station operator 9 9 Station 3 Speaker Volume Adjust Station 3 Volume R110 so that the voice from the Monitored Station is at a comfortable level for the Station 3 operator 9 10 Optional Hum Cancellation The jumper on JP2 should be removed and replaced If the sound level of the background noise or hum changes with this action replace JP2 jumper to the location nearest R180 If the sound does not change replace JP2 jumper to the location away from R180 and do not adjust 1 79 Adjust R179 for the minimum noise from a station speaker This is a subjective adjustment Page 20 Guardian Telecom Inc Installation amp Operation TBA Models 9 11 Optional ringing from PTTs The PTTs inputs can be used to operate the speaker as a microphone with the jumpers on J21 at the RELAY position The PTTs can also be used to directly activate the
24. sonnel should be qualified to work with electrical equipment The TBA amplifier enclosure is painted and uses stainless steel hardware internally The components within the enclosure are not waterproof or corrosion resistant so the enclosure should not be used in a corrosive or contaminated environment 6 2 AC Supply The Talk Back Amplifier uses 120 VAC at 60 Hz with a maximum of 1 amp continuous current for energy supply Note that the inrush current may be up to 10 amps for a fraction of a second There is an inrush surge reduction circuit that reduces the capacitive charging surge on power on This circuit can be evaluated for inrush surge reduction if there is a problem with the external 120 volt power current surge capability 6 2 1 230 VAC operation A 230 VAC to 24 VAC transformer can be special ordered for the TBA The input voltage labeling and serial number label must be changed or marked to indicate this change The front panel Power ON indicator must also be changed for 230 VAC operation 6 2 2 DC Supply Options The use of a separate DC supply for 27 to 35 volts 0 5 amps maximum is possible to replace the internal supply of the TBA logic and preamplifier sections for supply to J22 pins 1 and 3 The negative ground connection is available at J22 pin 3 and positive is attached to J22 pin 1 The use of a separate 30 to 70 volt supply 10 amps maximum can be applied separately for the audio power amplifiers if the jumper on J
25. standard connections Page 21 Guardian Telecom Inc Installation amp Operation TBA Models 11 Product Specifications AUDIO 150 OHMS DYNAMIC MICROPHONE PTT SWITCH DRY CONTACT SPST PRIMARY SPEAKER WHEN USED AS A TALK AUDIO 350 OHMS 1 MILLIVOLT RMS NOM 1 VOLT MAX BACK MICROPHONE PTT SwirCH DRY CONTACT SPST ADDITIONAL SPEAKERS WHEN USED AS TALK AUDIO 350 OHMS 1 MILLIVOLT RMS NOM 1 VoL T BACK MICROPHONES PTT SwiTCH DRY CONTACT SPST CONSOLE CHANNEL 325 OHMS 70V LINE 10 W PRIMARY SPEAKER CHANNEL 325 OHMS 70V LINE 10 W CHANNELS 1 2 amp 3 TBA30 40 50 325 OHMS 70V LINE 10 W DIMENSIONS H x W x D 5X16 5 x 12 INCHES 127 X 419 x 305 MM CONSOLE MICROPHONE INPUT AND CONTROL NET WEIGHT 20 POUNDS 9 KG STANDARD MOUNTING HORIZONTAL WIRING ACCESS CABLE GLANDS HARDWARE MATERIAL STAINLESS STEEL Page 22 Guardian Telecom Inc Installation amp Operation TBA Models Part No Description Page 23 Guardian Telecom Inc Installation amp Operation TBA Models 13 Warranty Guardian Telecom warrants your product to be free of defects in material and workmanship for a period of one year Guardian Telecom will repair or replace any defective unit that is under warranty free of charge This warranty is null and void if any non authorized modifications have been made to this product or if it has been subjected to misuse neglect or accident This warranty covers bench repairs only such repai
26. the system may or may not be approved check the labels on the speakers for ratings Follow all local codes and requirements when installing the TBA Intercom System The TBA does not have a weatherproof or drip proof rating and is not protected for prolonged exposure to high humidity and salt fog 6 Installation Instructions The Talk Back Amplifier TBA is an audio amplifier that has been designed to operate in a commercial setting In order to obtain the best results use shielded cable and follow the instructions below 6 1 TBA Enclosure The TBA enclosure houses the Printed Wiring Board Assembly PWBA within a steel enclosure that has a removable top cover A wiring diagram is on the inside of the cover The enclosure may be placed on a flat surface mounted in an equipment rack or otherwise securely mounted The TBA enclosure can dissipate up to 110 watts with all of the speaker amplifiers outputting maximum energy There must be adequate heat conduction so that the enclosure does not exceed 20 deg above ambient with 110 watts dissipation An air flow caused by convection with a 1 inch gap to surrounding side walls is normally adequate If in doubt test the temperature rise using a heater of 100 watts in the case and measure the resultant temperature after 1 hour The TBA enclosure top panel may be removed by unfastening the six screws Once the top panel has been removed access to 120 volts AC is provided therefore the service per
27. the microphone housing but it may be a foot switch The Central station is different from the other stations in that it has a separate microphone input as well as a speaker output The Central Station speaker also has a low level sidetone audio from the speaker to allow the user to hear that the Central Station audio output is working The Central Station console consists of a goose neck dynamic microphone and a hand switch or pedal switch for PTT The Central Station has the highest priority in using PTT When the Central Station PTT switch is engaged depressed the TBA puts a low level audio onto the Central Station speaker This low level is to prevent acoustical feedback The other speakers in the system are set to the speaker mode and output audio coming from the Central Station 4 2 Monitored Station The Monitored Station is different from the other stations in that it will continuously send the audio heard at its speaker to the other stations when no Press to Talk PTT switch in the TBA is depressed The Central Station and up to three stations normally output audio coming from the Monitored Station to their speakers The PTT switch on the Monitored Station is used only as a Ringing or Alert Tone activation Pressing the Monitored Station PTT will stop the audio output from the Monitored Station and put a Ringing tone onto the Central Station Monitored Station and the other stations speakers The Monitored Statio
Download Pdf Manuals
Related Search