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User Manual PS 260T / Issue 2010 © ASL Intercom BV
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7.0
SUM OUTPUTS
Each intercom line can be monitored via the audio output of each interface module. This the factory setting.
If required, one interface module can monitor both intercom lines: the intercom audio signals of both intercom
lines appear on the audio output connector of that interface module.
To achieve this, certain internal connections have to be made.
Procedure:
a.
Unscrew the upper cover plate and slide it backwards
b.
Place the unit in front of you, facing the front panel
c.
Depending on which output connection is required, follow one of the procedures described below
d.
Screw the cover plate back in place
Connection scheme A
Function
:
Output of interface 1 monitors intercom lines 1 + 2
Actions:
Connect the right tag of interface 2 with the middle
tag of interface 1. Connect the left tag of interface 2
to the left tag of interface 1.
Connection scheme B
Function:
Output of interface 2 monitors intercom lines 1 + 2.
Actions:
Connect the right tag of interface 1 with the middle
tag of interface 2. Connect the left tag of interface 1
to the left tag of interface 2.
8.0
TECHNICAL SPECIFICATIONS
Intercom Line Driver
Max. output current: 3 mA rms
output impedance: > 150 Kohm
Input Amplifier
input impedance: 600 ohm (transformer balanced)
input level: +30 dBu to -10 dBu
frequency response: 150 Hz
– 20 kHz (-3 dB)
Output Amplifier
output impedance : 600 ohm (transformer balanced)
maximum load: 600 ohms
max. output level: +20 dBu to -20 dBu
frequency response: 150 Hz - 20 kHz (-3 dB)
Side Tone Trimming
Rejection: better than 30 dB
Dimensions & Weight
width
19" (483mm)
height 1U (
1,75” / 44.5mm)
depth 126 mm
weight 1565 grams
Party Line Specifications
supply voltage: +30V DC (12V to 32V DC)
supply current: 33 mA quiescent / each
audio line level: -18 dBu to 0 dBu
signal-to-noise: 80dB
station bridging impedance: > 150 kOhm
0 dBu is defined as 775 mV into open circuit
ASL reserves the right to alter specifications without
prior notice
