ASL INTERCOM PS 289, Руководство пользователя

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User manual PS 289 / Issue 1 © 2006 ASL Intercom, Utrecht, The Netherlands
7
WARNING
Before you plug in the mains voltage, check if:
* The fuse is correct
* The voltage is correct
7.0 REAR PANEL CONTROLS AND CONNECTOR
17 A & B LINE connectors
These XLR-3 type connectors are for connecting the
remote-stations, via standard microphone cable. There
are two connectors for channel A and two connectors
for channel B.
Pin assignments:
1. 0V / ground shield
2. +30V power wire
3. audio wire
18 SYSTEM LINK IN connector
Input for the cable of an external party-line Intercom
system. If one or both channels of the PS 289 are to
be connected to another intercom system then these
connectors will accept the communication signals from
the other system.
19 AUX INPUT connector
This XLR-3 type aux input connector is electronically
balanced and accepts audio levels between –20dBu to
+21dBu on line level.
Pin assignments:
1. 0V / ground
2.
3. signal -
20 GROUND LIFT switch
With this switch the pin 1 of the AUX input XLR is lifted
from ground when in “Lift” position.
21 MAINS INLET / DISCONNECT DEVICE
IEC Mains connector. For correct wiring and operation
refer to section 4.0.
22 FUSE
This fuse protects the PS 289 against severe internal
damage, in case of malfunction in the power section.
To remove the fuse the mains cord must be removed.
It is most important to place the correct fuse in the
holder:
Mains voltage
fuse
100 – 240 VAC T 1250 mA
Spare fuses are supplied with the unit.
23 DC INPUT connectors
These connectors can be used as a backup power
supply or when no 100/240 VAC voltage supply is
available. They accept 12 – 28 VDC.