The tape/booster output signal can also be used to feed an AUX input of another amplifier for system expansion or
greater power capabilities.
Note that the tape/booster output signal level is constant and unaffected by any of the amplifier controls.
OUTPUT CONNECTIONS
FIGURE 6.
CAUTION:
CONNECT ONLY TO PBX INCORPORATING ISOLATION FROM TELECOM NETWORK.
ATTENTION:
RACCORDER SUELEMENT A UNSYSTEME PBX INDEPENDANT/DU RESEAU DE
TELECOMMUNICATION.
Connect output wires to the COM screw terminal and the selected mode for constant voltage distribution, i.e. 25 volts or
70 volts. The constant voltage distribution method facilitates the use of multiple speakers in parallel with a single
amplifier. Note that each speaker must have its own line-matching transformer. The tap on the line matching transformer
is selected to give the power desired for each speaker.
It is recommended for long distances to use a wire as heavy as possible in order to minimize a consequent power loss on
the distribution line.
NOTE:
TO ALLOW FOR FUTURE EXPANSION, IT IS RECOMMENDED THAT THE TOTAL SYSTEM WATTAGE
SHOULD NOT EXCEED 85% OF THE AMPLIFIER'S RATED OUTPUT (I.E. 51 WATTS FOR THE TPA-60
AND 85 WATTS FOR THE TPA-100).
THE TOTAL SYSTEM WATTAGE REQUIREMENT IS THE SUMMATION OF THE WATTAGE TAP
SELECTIONS OF ALL SYSTEMS SPEAKERS AND HORNS.
A single 4 ohm or 8 ohm speaker may be connected to the COM and either the 4 ohm or 8 ohm terminals. Be sure that
the wattage rating of the speaker exceeds that of the amplifier.
P81932 H
SHEET 5 OF 7
UNUSED CO TRUNK PORT CONNECTIONS
When connecting an amplifier to an unused CO trunk port, install as shown in Figure 7 using an RPS-2406 power supply
to provide talk battery to the port.
