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
Pushing these buttons allow talking to each
channel separately or to some or all channels
simultaneously. If 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 has to 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.
If pushed again, the TALK button switches off.
User Manual PS 6379 Mk2 / October 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.
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
To activate 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
With these trimmers (one set for each channel)
one may minimize 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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