PAGE 6
User Manual PS 680 / Issue 2010 © ASL Intercom BV
8.0
REAR PANEL CONTROLS & CONNECTORS
8
LINE connectors A - F
These XLR-3 connectors are for connecting the 8
intercom party lines (standard microphone cable)
Pin assignments :
pin 1: 0V / ground shield
pin 2: +30V power wire
pin 3: audio wire
9
AUX INPUT connectors
These two XLR-3 Aux inputs are electronically
balanced and accept audio levels between
–18dBu
to +22dBu on line level and
–38dBu to +2dBu on
mic level.
Pin assignments :
pin 1: 0V / ground
pin 2:
pin 3: signal -
10
MIC / LINE switches
With these switches Line level or Mic level for each
AUX input can be selected. When mic level is
selected, a +30V DC phantom power is supplied to
pins 2 and 3 of the AUX input connector.
11
MIC GAIN trimmers
These trimmers adjust the sensitivity of the AUX
input when mic level is selected.
12
FUSE holder
The fuse protects the PS 680 against severe internal
damage, in case of malfunction of the internal power
supplies.
Before replacing the fuse the mains cord must
be removed. The fuse has to be T 1250 mA for
all mains voltages 100
– 240V AC.
13
MAINS inlet
IEC Mains connector. For correct wiring see section
6.0.
14
REMOTE MUTE C AUX
OUTPUTS connector
The Mic Mute and Buzzer Mute push buttons on the
front panel of the PS 680 allow for sending these
mute signals to all channels simultaneously.
In case it is required that these mute signals can
also be sent to each channel separately, an external
switch box is needed which may be connected to
this D25 connector.
Using this switch box Mic or Buzzer mute signals
can be sent to all channels simultaneously OR to
each channel separately.
To activate a mic of buzzer mute, the switch box
connects the required pins of the D-25 connector to
ground. See D-25 pin layout below.
The external switch box is made to order. Specific
requirements of the user as far as for instance type
of switches can be fulfilled.
On the D-25 connector are also available the
unbalanced AUX signals, on pin 2 and 3. It concerns
the pre-amplified signals taken after the AUX master
volume controls (#6) before they are sent to the Aux
matrix. Use high impedance loads only (minimum
20 kΩ); lower loads may disrupt the AUX signals to
the intercom lines.
Pin layout of the D-25 connector:
1
Ground (0V)
2
Unbalanced AUX signal 2
3
Unbalanced AUX signal 1
4
+30V DC (max. load 1A )
5
+30V DC (max. load 1A)
6
+9V DC (max. load 50 mA )
7
Mic mute all channels
8
Mic mute channel F
9
Mic mute channel E
10
Mic mute channel D
11
Mic mute channel C
12
Mic mute channel B
13
Mic mute channel A
14
Ground (0V)
15
Ground (0V)
16
Ground (0V)
17
not used
18
not used
19
Buzzer mute all channels
20
Buzzer mute channel A
21
Buzzer mute channel B
22
Buzzer mute channel C
23
Buzzer mute channel D
24
Buzzer mute channel E
25
Buzzer mute channel F
Please note that the +9V DC supply is NOT
short-circuit protected !
