Summary of Contents for Guardian Telecom TBA Series
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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...
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. 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.
Guardian Telecom Inc. Installation & 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.
Guardian 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 Rear Page 6...
Guardian Telecom Inc. Installation & Operation TBA Models 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.
Guardian Telecom Inc. Installation & 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.
Guardian Telecom Inc. Installation & 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.
Guardian Telecom Inc. Installation & 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.
Guardian Telecom Inc. Installation & 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.
Guardian Telecom Inc. Installation & Operation TBA Models 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 #3 are connected in the same manner as the Monitored Station shown below.
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.
Guardian Telecom Inc. Installation & Operation TBA Models The connections for the TBA-33 PWBAs starting in 2012 are shown below. Note that the value of R161 is 10 K Ohm and R166 is 1.0 K Ohm to reduce the input gain to telephone line levels. The transformer...
Guardian Telecom Inc. Installation & Operation TBA Models Installation Adjustments The speaker outputs levels are each individually adjustable. The gain for the Central Station microphone is adjustable. The gain for the Monitored Station, Station #1, #2, and #3 are on one adjustment.
Guardian Telecom Inc. Installation & 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 –...
Guardian Telecom Inc. Installation & 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 “Ringer” output with a jumper on J21 at the “RINGING”...
Guardian Telecom Inc. Installation & Operation TBA Models 11. Product Specifications Electrical 120VAC @ 60 H OWER EQUIREMENT 250V, 1.0A, S , 1AG OWER UPPLY @ 50/60 H 30 VDC 10A E PTIONAL OWER UPPLIES Z OR XTERNAL OWER Audio And Control Inputs...
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.
When a product has been installed following user 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.
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Guardian Telecom Inc. Installation & Operation TBA Models Notes: Model No. Part No. Serial No. Date of Purchase Page 26...
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