Front Panel Controls & Connector - ASL INTERCOM PS 6379 Mk2 User Manual

Switching On :
To limit the inrush current after the PS 6379
Mk2 has been switched on, 30 V DC line power
is provided to the intercom channels, one after
the other. If a channel is found to have too
many stations being connected or in case of
short circuit, a circuit breaker immediately shuts
off that channel from 30V DC line power.
7.0 FRONT PANEL CONTROLS & CONNECTOR
1 TALK buttons
These buttons allow talking to each channel
separately or to some or all channels
simultaneously. When a TALK button is
switched on, its large green LED is lit.
By pushing and holding the TALK button of a
so-called IFB channel (see section 10.0), the
TALK buttons of the intercom channels switch
automatically off. To talk to an IFB channel and
additionally to a intercom channel, one should
also push and hold the TALK button of that
intercom channel.
To achieve that one can talk to an IFB channel
and to all intercom channels of which the TALK
buttons are enabled (the corresponding Talk
LEDs are lit), the position of a certain DIP
switch has to be changed. See section 11.0,
DIP switch A.
Momentary switching:
If a TALK button is pushed and held, the
microphone signal is sent to the referring
intercom channel until the button is released.
Latched switching:
If a TALK button is pushed shortly, it is
electronically latched and the microphone
signal is sent to the referring intercom channel.
User Manual PS 6379 Mk2 / February 2013 © ASL Intercom BV
If the total amount of to the PS 6379 Mk2
connected user stations is found to exceed the
allowed maximum (see section 2.0), a "master
circuit breaker" shuts off the line power to all
channels.
If pushed again, the TALK button switches off.
For each channel the latch function can be
disabled by changing the position of certain DIP
switches (see section 11.0, DIP switch group
E). The TALK button is then "momentary only".
2 CALL button
This button activates the call system, for each
channel separately. By a momentary push a
visual CALL signal is sent to all stations
connected to the referring intercom channel and
the call LEDs start flashing. By holding the
CALL buttons for 2 seconds the buzzers are
activated, provided there is no buzzer mute
status on that channel. After the CALL button is
released the LEDs continue to flash for a further
2 seconds. The CALL function of a channel in
IFB mode is automatically disabled.
3 NULL ADJUST trimmers
These trimmers (one set for each channel) are
for minimizing the speaker feeding back into the
gooseneck microphone (unit feedback) and for
minimizing the headset mic feeding back into
the headset can(s); the LOW trimmer is for all
frequencies, the HIGH trimmer solely for the
high frequencies.
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