MASTERUNITS:
“C” Models default to Master, or speaker, mode. In Master mode, the unit acts as a
speaker and broadcasts audio signals generated elsewhere in the intercom system.
Depressing the Talk switch turns the unit into a microphone and enables the user to
broadcast to all other intercoms in the system. Releasing the switch returns the unit to
Master mode. Figure 2, 3, and 6 illustrates a Master/Hands-Free intercom system.
HANDS-FREEUNITS:
“D” Models default to Hands-Free, or microphone, mode. In Hands-Free mode, the unit
is designed to serve as a hands-free microphone with transmission to all Master units
in the intercom system. The Hands-Free unit will act as a speaker and broadcast audio
transmissions only when the Talk switch of any Master unit in the intercom system is
depressed. Figure 2, 3, and 6 illustrates a Master/Hands-Free intercom system.
MICROPHONE:
“-7” Hand-Held Noise Canceling Microphones are recommended for use in environ-
ments with high levels of ambient noise. Keying the microphone overrides the default
mode of the intercom and enables audio transmission to all units in the intercom
system. Figure 2 illustrates a common intercom system where hand-held microphones
are used.
HEADSETMICROPHONEWITH-BELT-SWITCH:
“-M34” Headset Microphones and Belt Switches are an additional option for environ-
ments with a high level of ambient noise. Keying the belt switch overrides the default
mode of the intercom and enables audio transmission to all units in the intercom sys-
tem. Figure 3 illustrates a common intercom system where a headset with microphone
and belt switch are used.
REMOTEPOWER:
“-1” Models are designed to have one cable rather than two, with power and audio
signals in the same cable. Figure 6 illustrates this configuration.
PRE-AMPLIFIER:
“-8” Models are equipped with a pre-amplifier and are designed for use with Hands-
Free speaker units such as the ADSV-25-Z Remote Speaker with Volume Control. The
“-M44” option equips the “-8” Master unit with a knob for controlling the volume of re-
mote speakers such as the ADSF-25-Z Flush Mount Speaker or the ADSS-25-Z Swivel
Mount Speaker. Figures 4, 5, and 7 illustrate intercom systems with the “-8” and “-M44”
options.
SURGEPROTECTION:
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 and
overheat protection.
FOOTPEDALREADY:
Models with the “-2” option are designed for hands-free activation of the Talk/Listen
switch. Figure 6 shows an example of intercoms with this option.
B. General Speaker Specifications.
The Atkinson Dynamics product line consists of a variety of speaker models. Mod-
el ADSV-25 is a remote speaker station with volume control for use with “-8” intercom
models. Models ADSS-25-Z and ADSF-25-Z are remote speakers for use with intercoms
-3-
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