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E-200 SERIES INTERCOM SYSTEM — EF-200 DUAL CHANNEL MASTER STATION
SLAVE CHANNELS LINK SWITCH
This switch is only enabled when the unit is configured in slave mode, in master mode
it is disabled. In a multichannel system, the slave channels link switch of the slave station
allows to join the master station unit channel A with the slave station unit channel A, this
way the same signal appears in both channels. If the channels are linked, the units connected to
the master station channel A can communicate with the connected to the slave station channel A,
and the calls carried out in any channel A (master or slave) will arrive to all the units connected to
both channels A.
This switch, together with the lines A and B link switch allows to join all the channels of a
multichannel system.
EMERGENCY SWITCH (BATTERY OPERATION)
The emergency switch allows the battery operation of the intercom system in
mains power failures.
If a battery (6LR61 type - 9VDC, the use of alkaline batteries is recommended) is
installed in the battery holder placed at the rear panel (consult emergency battery
placement section for more information), and there is a cut in the mains power supply,
upon pressing this switch, the system will turn on for 10 minutes or until the mains power supply is
recovered (what happens before).
The approximate duration of an alkaline battery, in a system with a master station unit and
four beltpacks, is an hour.
6. OPTIONS
In this section we will explain the different available options for the master station EF-200 unit.
PROGRAM INPUT TRANSFORMER (IT-DA)
In order to improve the common mode rejection ratio and get a galvanic isolation with the
previous part of the audio system, an input transformer for the program input is available.
The provided transformers fulfil the isolation rule of 1.5 kV.
PA OUTPUT TRANSFORMER (OT-DA)
In order to get a galvanic isolation with the next part of the audio system, an output
transformer for the PA output is available.
The provided transformers fulfil the isolation rule of 2 kV.
SECURITY COVER (TP-1)
In some installation, it may be necessary to tamper proof the front panel controls avoiding
unwanted or accidental manipulations. For this purpose, it is available as an option, a transparent
plastic security cover. The installation is very easy, only with two provided screws.
KEY LOCKED SECURITY COVER (TS-1)
In some installations it is necessary to isolate the master station unit controls with more
security than with the plastic security cover. For this extra protection, it is available an all-metallic
and lockable security cover. This option cover fits into the four rack holes of the unit and includes
rear nut-bars allowing the installation as a stand-alone unit.
This cover prevents also from unauthorised extraction when the unit is rack mounted.
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