CALL BUTTON:
“A” Models are equipped with a Call switch. Depressing the call switch transmits an 890 Hz
tone to all units in the intercom system. The volume of the call signal is affected by the volume
control on the receiving unit, so if volume is turned all the way down at a receiving station, the
call signal will not be heard.
CAUTION
The call signal is louder than normal voice messages being carried on the line. Do not depress
the call switch while carrying on a conversation with someone on the system.
This will subject the listener to very loud sound levels.
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. Figure 2 illustrates
an intercom system 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 4 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 the 120/240VAC intercoms only.
B. Unpacking.
After unpacking the Atkinson Dynamics panel mount intercom, examine it for damage that may
have occurred in transit. If the equipment has been damaged, do not attempt to install or operate
it, and file a claim immediately with the carrier stating the extent of the damage. Carefully
check all envelopes, shipping labels and tags before removing or destroying them.
Before attempting to install the intercom, be sure that all parts listed in the KIT CONTENTS
LIST have been supplied.
C. Kit Contents List.
Qty. Description Part Number
1 Resistor, 1K, 1W 101216
1 Instruction Manual 2561542A
-3-
(12 stránky)
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