Atkinson Dynamics AD-27 Manual de instrucciones descargar pdf (Pagina 4)

speaker mounted on the front panel of the desk set. Depressing the

PTT (press-to-talk) button on the handset while speaking into the

handset microphone enables the user to broadcast to all other inter-

coms in the system. Releasing the PTT button returns the unit to

Master mode. Figure 3 illustrates a Master/Slave intercom system.

SELECTIVE SWITCHING:

“-6” Models are equipped with separate talk and listen lines for selec-

tive switching in a Master/Remote intercom system. A Master intercom

can select to talk to any one or more remotes through the use of a

customer supplied switch box. Figure 4 illustrates a Master/Remote

intercom system using a customer supplied switch box and toggle

switch.

REMOTE MONITOR SWITCH:

“-M22” Models are Master units equipped with a monitor on/off toggle

switch. Figure 5 illustrates an intercom system utilizing this model.

When the monitor switch is “on,” it allows the remote intercom to serve

as a “hands-free” microphone with transmission to the Master. When

the monitor switch is “off,” the remote intercom must press its talk

switch to broadcast to the Master. The remote unit will act as a

speaker and broadcast audio only when the PTT button on the Master

is depressed.

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.

B. UNPACKING.

After unpacking the Atkinson Dynamics desk set 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 immedi-

ately 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.

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Atkinson Dynamics AD-27 Manual de instrucciones Pagina 4