-3-
HEADSET MICROPHONE WITH-BELT-SWITCH:
“M34” Headset Microphones and Belt Switches are an additional option for environments with a
high level of ambient noise. Keying the belt switch overrides the default mode of the intercom
and enables audio transmission to all Master units in the intercom system. Figure 5 illustrates a
common intercom system where a headset microphone and belt switch are used.
REMOTE POWER:
“-1” Models are designed to provide power to “-1” remote intercom units. The AC-powered main
unit provides 12 Volts DC-power and audio in the same cable to the remote unit. A “-1” unit can
provide power to just one remote unit. Figure 3 illustrates this configuration.
PRE-AMPLIFIER:
“-8” Models are equipped with a pre-amplifier and are designed for use with Slave speaker units
such as the AD-SV-25 Remote Speaker with Volume Control. The “-M44” option equips the “-8”
Master unit with a knob for controlling the volume of remote speakers such as the AD-SF-25
Flush Mount Speaker or the AD-SS-25 Swivel Mount Speaker. Figures 6 and 7 illustrate intercom
systems with the “-8” and “-M44” options.
EXTERNAL-POWER-SOURCE:
The use of an external power source allows the user to configure intercom systems made up of “-
1” DC-powered Master and Slave units. Figure 8 illustrates such a system.
SURGE PROTECTION:
Metal Oxide Varistor (MOV) devices are used to protect the audio lines. The intercom must have
Earth or Chassis Ground terminated to it to ensure surge protection.
The output amplifier of the Atkinson Dynamics intercom offers full short circuit protection and
overheat protection on AC models only.
FOOT PEDAL READY:
Models with the “-2” option are designed for hands-free activation of the Talk/Listen switch.
Figures 9, 10, and 17 show examples of intercoms with this option. A heavy-duty foot pedal
(Model ADFP) is available through Atkinson Dynamics.
AUXILIARY SIGNAL:
Models with the “-3” option are equipped with a call button that provides a contact closure for an
attention-getting auxiliary device, e.g. a strobe light. Figure 13 demonstrates an intercom system
with this option. Atkinson Dynamics offers a low profile strobe light that is available with an
amber or red lens, pipe or surface mount configuration, and in three voltage variations.
ZONED SYSTEM REMOTE:
Models with the “-6” option are designed for use in a zoned system. Figure 11 illustrates a zoned
intercom system. A master intercom can select (via a switch box) to talk to any one or more
remotes in a system. Each remote unit is equipped with a Talk/Listen switch that enables
communication to the master intercom, even when that zone is not selected. Atkinson Dynamics
offers 6-zone and 12-zone switch boxes.
MONITOR SWITCH:
Models with the “-M22” option are equipped with a monitor on/off toggle switch. When the
monitor switch is in the on position, the remote unit becomes a slave and defaults to talk mode.
Figures 14 and 15 illustrate systems with this feature.
(12 pagine)
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