Specifications

Table 4. Controls and Indicators, Terminals and Connectors
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.
7.
Screw adjustable potentiometers: VOX sensitivity level, Music ducking (mute level for music during voice
page), Music level for various music sources
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 audio 70V output to next 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.
Telephone System interface for PBX, KTS, 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
25