32 SYSTEM LINK connector
Input for the cable of an external party-line Intercom
system which has its own power supply. If any or all of
the channels are to be connected to another intercom
system, then these connectors will accept the
communication signals from the other system without
impedance problems and without using power from the
other system.
33 LIFT / GROUND switch
With these switches the pin 1 of either the AUX input,
Program input or IFB input XLRs are lifted from ground
when in 'Lift' position.
34 AUX INPUT connector (auxiliary)
This XLR female connector is electronically balanced
and used to connect a line level signal which can be
routed to any intercom channel by using the AUX
buttons.
Pin assignments:
1. 0V / ground
2. Signal +
3. Signal -
35 PROGRAM INPUT connector
This XLR female connector is electronically balanced
and used to connect a line level signal which will be
routed to the loudspeaker of the PS 4379 only.
36 IFB INPUT connector (AUX)
This XLR female connector is electronically balanced
and used to connect a line level signal which will be
routed to the channels which are in IFB mode.
Pin assignments:
1. 0V / ground
2. Signal +
3. Signal -
37 MIC DIRECT OUT
This XLR3 male connector is electronically balanced
and outputs the pre-amplified microphone signal at line
level.
28 EXTENDED STATION LINK
This connector is used when 2 units (either 2 x PS
4379 or 1 x PS 4379 with PS 4379) should be linked to
form a 10 or 12 channel unit. When linked, 1 station
will be the master with an active speaker and goose-
neck /electret microphone. The speaker and micro-
phone of the other unit will be switched off. The CALL
ALL and TALK ALL signals will also be sent to the
channels of the extended unit.
29 NEAR STATION LINK
This connector is used to prevent system feedback
when two PS 4379 / PS 4379 are used close to each
other in the same room. This connection will dim the
listening level should the 'near station' talk on the same
channels the 'linked' station is listening to. The dim
factor can be adjusted per channel by pressing and
holding the 'set up lock' button and pressing and
holding the TALK button of the channel. The adjust-
ment is done by turning the Aux level/ IFB dim knob.
30 GPIO
This 9-pin connector is a general purpose in - out
connector. The settings are as follows:
- Pin 1 = GND
- Pin 2 = GPIO output 1 (default=microphone
functioning, active = high)
- Pin 3 = output 2 (default=External power supply is
used, active = high)
- Pin 4 = Relay common contact
- Pin 5 GPIO input 2 (default=mic mute all button,
active = low)
- Pin 6 = GPIO input 1 (default=buzzer mute all
button, active = low
- Pin 7 = GPIO input 3 (default=tall all button,
active = low
- Pin 8 = Relay normally open contact
- Pin 9 = Relay normally open contact
31 LINE connector (per channel)
These XLR-3 connectors are for connecting the
PS 4379 to the remote stations, via standard micro-
phone cable. There are two connectors for each
channel.
Pin assignments:
1. 0V / ground
2. +30 V power wire
3. Audio wire
7.0 REAR PANEL CONTROLS & CONNECTOR
10 User Manual PS 4379 - Issue 1 © 2007 ASL Intercom, Utrecht, The Netherlands
(11 paginas)
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