Guardian Telecom TBA Series Installation & Operation Manual Download Page 13 | Manualshive

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Guardian Telecom Inc.

Installation & 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.

Figure 8 - TBA-33 Internal Audio Connections Pre 2012

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Summary of Contents for TBA Series

Page 1: ...Talk Back Intercom System Model TBA Installation Operation P007143 Rev D 150824 8 24 2015 11 32 AM Ph 403 258 3100 email info guardiantelecom com www guardiantelecom com...

Page 2: ...ion 9 6 2 2 DC Supply Options 9 6 3 Push to Talk Switches 10 6 4 Microphone 10 6 5 Speaker 10 7 TBA Configurations except for TBA 33 11 8 TBA 33 Configuration 13 9 Installation Adjustments 19 9 1 Init...

Page 3: ...tions 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 Sta...

Page 4: ...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 TB...

Page 5: ...e the volume controls have numbers from1 to 10 to assist in setting repeatability Figure 2 TBA 41 Front Panel 3 3 TBA Rear Panel The TBA Rear Panel of the enclosure has from two to five cable entries...

Page 6: ...Telecom Inc Installation Operation TBA Models 3 4 TBA Enclosure Inside The photos below show the TBA 50 with the top cover removed Figure 4 TBA Enclosure Inside Front Figure 5 TBA Enclosure Inside Rea...

Page 7: ...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...

Page 8: ...he 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 Central Station at the doghouse w...

Page 9: ...volts AC is provided therefore the service personnel should be qualified to work with electrical equipment The TBA amplifier enclosure is painted and uses stainless steel hardware internally The compo...

Page 10: ...ource 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 w...

Page 11: ...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 conn...

Page 12: ...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 3 are connected in the same manner as the Monitored Station s...

Page 13: ...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 spe...

Page 14: ...Guardian Telecom Inc Installation Operation TBA Models Figure 9 TBA 33 Internal Transformer Connections Pre 2012 Page 14...

Page 15: ...hm and R166 is 1 0 K 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...

Page 16: ...Guardian Telecom Inc Installation Operation TBA Models Figure 11 TBA 33 Internal Transformer Connections Starting 2012 Page 16...

Page 17: ...Guardian Telecom Inc Installation Operation TBA Models Figure 12 Station Connector Wiring Figure 13 Central Station Microphone Wiring Page 17...

Page 18: ...Guardian Telecom Inc Installation Operation TBA Models Figure 14 Central Station Speaker Wiring Page 18...

Page 19: ...justment 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 rotatio...

Page 20: ...so that it is at 50 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...

Page 21: ...r 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 N...

Page 22: ...R WHEN USED AS A TALK BACK MICROPHONE AUDIO 350 OHMS 1 MILLIVOLT RMS NOM 1 VOLT MAX PTT SWITCH DRY CONTACT SPST ADDITIONAL SPEAKERS WHEN USED AS TALK BACK MICROPHONES AUDIO 350 OHMS 1 MILLIVOLT RMS NO...

Page 23: ...P004833 Switch Rotary Cap Pointer Black P004851 Switch Faceplate Snap In Rocker White P005123 Label Volume Control Plate P005995 Neon Lamp 120VAC P006322 Volume Control Switch Assembly P006697 Connect...

Page 24: ...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 wi...

Page 25: ...ng 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 re...

Page 26: ...Guardian Telecom Inc Installation Operation TBA Models Page 26 Notes Model No Part No Serial No Date of Purchase...

Page 27: ...THIS PAGE INTENTIONALLY LEFT BLANK...

Page 28: ...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...

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