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Requirements stated on the instruction sheet of the paging adaptor MUST BE MET. After completing installation of both intercom system and the paging adaptor, then you may proceed to installation of PG-A amplifier. Unplug both power supply for intercom system and amplifier while making wiring connections. AMPLIFIER INPUT CONNECTIONS The greater the distance between the paging adaptor and the amplifier will increase the possibility of picking up R.F. signals or electrical noise. The paging adaptor and amplifier should be located as close as possible to each other and shielded cable should always be used to connect them. PAGING AMPLIFIER PG- © 0 IA, PG-30A or PG-60A INPUT _V----- PAGING ADAPTOR PG-U, PA-1, PB-1 or MC-A “I ^ A "0GND 1) Connect output A terminal on paging adaptor to input A terminal on PG-A amplifier. 2) Connect output GND terminal on paging adaptor to input E terminal on PG-A amplifier. * G terminal which has a green colored screw head must be ground for avoiding electric shock or hazard. AMPLIFIER OUTPUT CONNECTIONS Pull out the output plug and remove the cap. Insert speaker line, thru the cap, one into common pin indicated COM and the other into either 25V or 70.7V pin. Attach the conductors to the pins with low heat soldering. Replace the cap and insert the output plug into recepticle. SPEAKER REQUIREMENTS OUTPUT /"">n25V COM D D V_y 70V © -CONDUCTORS MUST BE ATTACHED TO PINS WITH SOLDERING - OUTPUT PLUG IMPORTANT - CAP -2-CONDUCTORS (SPEAKER LINE) 1 It is imperative that the total power consumed for speakers MUST NOT EXCEED the output power of amplifier i.e. maximum 10 watts for PG-10A, 30 watts for PG-30A and 60 watts for PG-60A. Greater output than 60 watts may be obtained by multiple installation of amplifiers. Refer to drawing below. 2 It is NOT REQUIRED to have a dummy load when the power consumed for speakers is less than the output power of amplifier. 3 A low impedance speaker such as 8 ohm horn must be installed using a matching transformer. 4 The total impedance of all speakers, matching transformers, and length of speakers run must be equal or more than the output impedance of the amplifier. Refer to chart below. After computing the resistance of your speaker, transformers, and speaker line, add a resistor in series to speaker line to increase impedance to match chart. MULTPLE INSTALLATION OUTPUT IMPEDANCE 25 volt line 70.7 volt line PG-10A 62.5 ohms 500 ohms PG-30A 21 ohms ; 167 ohms PG-60A 10.5 ohms \ 83 ohms * Output of each amplifier (speaker line) MUST BE SEPARATE. INSTALLATION EXAMPLE 1) This example illustrates connection of TB-H system with single zone paging without talkback. 2) in this example button #6 on each phone operates paging. NOTE: Each paging adaptor requires different wiring. Please refer to the instruction sheet packed with the adaptor you are going to install. WALL MOUNTING INSTALLATION Your PG-A amplifier is designed either for shelf or wall mount...

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