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Table 9.
Controls and Indicators, Terminals and Connectors
The
Dry Loop 600 Ohm
is a four wire interface consisting of a dry audio pair with a 600 Ohm impedance
and a control pair. The page input is activated when the control pair receives a contact closure from the
host equipment,connecting C1 to ground. The Dry Loop page input can also be activated by the pres-
ence of page input audio signals that exceed a set threshold. This threshold is set by the page VOX
adjustment; clockwise rotation lowers the threshold and makes it more sensitive. Adjust by experimenta-
tion to account for various line loss and noise. This feature is beneficial for (amplified) microphone
sources that don't have a Music/Page control contact, or for remote AmpliCenters.
Dry Loop Hi Impedance
is used to interface with parallel multiple units. Input impedance is 100K ohms.
Otherwise, the same as the 600 Ohm dry loop operation.
1.
AC Power in: 105 – 125 VAC, 210 – 250 VAC, 50/60 Hz. (voltage auto-selectable within unit)
2.
0dBm out, an auxiliary output that differs from the main 70.7V output in that it is a low level (0dB), 600 Ohm balanced output
used for driving a remote or off-premises amplifier
3.
DC Power, and 70V audio out to standard Controller (Not used on self-powered Controller)
4.
Bass control screw-type adjustment pot. Attenuates low frequencies so that horns and small speakers are not overdriven by
excessive bass energy. Cut-off freq. adjustable from 50 Hz (full CCW) to 400 Hz (full CW)
5.
Music In: left and/or right channels with ground; Paging In: redundant paging input (ground, C1, tip, and ring); 70V Out:
Balanced output used for terminating the loudspeaker wiring
6.
Screw adjustable potentiometers: VOX sensitivity level, Music ducking (mute level for music during voice page), Music level
for various music sources
7.
LEDs: green – power on, lights when AC line voltage is applied to AmpliCenter
red – overload, lights when the AmpliCenter output exceeds its output power rating.
This can occur when total speaker load is greater than the output rating, or
when speaker wiring is shorted
red – unbalanced output, indicates when one speaker lead is accidentally shorted to ground
green – page accessed, lights when voice paging is active
8.
Telephone system mode switch: dry loop 600 Ohms, dry loop Hi Z, ground start, or loop start
9.
Page input from host telephone system or Controller 6-conductor cable (see item 16): paging audio and control
10.
DB9 connector, RS-232 PC interface port, used for PC programming of Controller and PC monitoring
11.
Zone option 3-position slide switch: 70V audio out, contact closure input, contact closure output
11A.
Zone connector for zones 1-8, plus, minus, and ground screw down terminals
12.
LEDs: Yellow-attendant access active; Green-telephone access active
13.
8-pin Molex connector: DC power, control, and 70V audio from AmpliCenter
14.
DC power, control, and 70V audio output to Zone Expansion Unit
15.
10-position connector: terminals 1/2 0dBm (600 Ohm), terminals 3/4 0dBu output to other equipment, terminals 5/6 night bell
in, terminals 7/8 control closure for attendant access input, terminals 9/10-audio source (mic) attendant access input
16.
Audio and control to AmpliCenter 6-conductor jack, item #9
17.
Telephone Mode switch: Dry Loop, Station Access, Ground Start, and Loop Start
18.
CO Port, Auxiliary Port, Analog Extension or Centrex systems; standard 6-conductor jack
19.
Zone connector for expansion zones: plus, minus, and ground screw terminals
20.
8-pin Molex connector from controller: power, control, and 70V audio or previous Zone Expansion Unit
21.
8-pin Molex connector to additional Zone Expansion Unit: power, control, and audio
22.
DIP switch to be set when one, two, or three Zone Expansion Unit(s) are used.
23.
Volume output control on self-powered Controller
24.
Amplified audio input terminals on self-powered Controller
25.
Power connector input for 16.5 volt power module on self-powered Controller
26.
AC power transformer to self-powered Controller: 120VAC, 60 Hz, 200 mAmp to 16.5 VAC
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