Clear-Com Communication Systems
Encore System Installation Instruction Manual
1-11
interrupted by the announcement. Program audio feed to the
Announce Output is selected by setting a jumper on the Main
board to the ON position. The pinout of the Announce Out
connector is as follows:
• Pin 1 --- Ground (Shield)
• Pin 2 --- - Signal
• Pin 3 --- + Signal
The audio output is balanced and transformer isolated. It has a 600
ohm impedance and a nominal output level of 0 dBu. A shielded
twisted pair cable should be used in the cable wired to this
connector.
• Relay Out: On Main and Remote Stations with an Announce
button, a dry set of relay contacts is provided through a 1/4 inch
jack or screw terminals on the rear panel. These contacts can
activate an external device such as a PA amplifier to another
room. The contacts are rated for 2.0 Amps at 24 VDC. If screw
terminals are provided on the Main Station, their connections are
labeled N/C, C and N/O. The 1/4 inch jack is wired as follows:
• Ring --- Normally Closed Contact --- N/C
• Tip --- Common Contact --- C
• Sleeve --- Normally Open Contact --- N/O
• Program Input: A 3-pin XLR female connector on most Main
Stations and Power Supplies provides the program input to the
intercom system. The Program Input accepts a balanced or
unbalanced line-level audio signal from -20 dBu to +10 dBu.
There is an option to feed program audio to the Announce
Output. This is selected by setting a jumper on the Main board to
the ON position. When this option is selected, a 0 dBu signal on
the Program Input will produce a 0dBu signal on the Announce
Output.
The pinout of the Program Input connector is as follows:
• Pin 1 --- Ground (Shield)
• Pin 2 --- + Signal
• Pin 3 --- - Signal
• External Speaker: Some Main Stations provide an 8 ohm
external speaker output through a 1/4 inch jack.
• Auxiliary Connector: Some Main Stations provide a DB-15 type
Auxiliary connector on the rear panel. This allows connection to a
variety of devices, depending upon the capabilities and features
of that particular Main Station. Refer to the Main Station User
Manual for further details on the connections provided.
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