ClearCom KB-212 Bedienerhandbuch PDF herunterladen (Seite 17)

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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