Installation manual

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 pro-

vides the program input to the intercom system. The Program Input accepts a balanced or unbal-

anced line-level audio signal from -20 dBv to +10 dBv. 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 dBv signal on the Program Input will produce a 0dBv 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 con-

nections provided.

AC Power Connection: An IEC type 320 connector is provided on most Main Stations and Power

Supplies to interface to the appropriate AC power cord to be used. Refer to the chart on the inside

back cover of this manual. Main Stations and Power Supplies can either be switched between 115

or 230 VAC operation or will automatically adjust to voltages from 90 to 240 VAC at 50 or 60 Hz.

Consult the User Manual for information on the particular unit.

Configuring Clear-Com Products to Work Together

Clear-Com Intercom Systems are designed to integrate with many other Clear-Com products. The fol-

lowing sections describe some frequently used configurations. Most of these configurations involve the

use of Clear-Com's versatile Call signal. This signal travels silently through the intercom wiring and is

often used to get the attention of operators who have removed their headsets. However, as the follow-

ing descriptions show, it can also be used to control a variety of functions.

TW-40 Two-Way Radio Interface

It is often important to link walkie-talkies into an intercom system to extend communication to remote

persons. The TW-40 Two-Way Radio Interface connects between an intercom line and a variety of

walkie-talkies, using one walkie-talkie as a base station. Refer to the TW-40 Instruction Manual for de-

tails describing the connection of the TW-40. To interface with the TW-40, the option switches of the

Main or Remote Station must be set as follows:

Enable the Momentary Talk option switch or jumper on the appropriate channel of the Main or Re-

mote Station. Refer to the User Manual for the Main or Remote Station to locate this switch or

jumper. This will cause the Talk button to have a momentary only action and not latch.

Enable the Call on Talk option switch or jumper on the appropriate channel of the Main or Remote

Station. Again, refer to the User Manual for the Main to locate this switch or jumper. This will cause

the Call signal to be activated whenever the Talk button is held down.

When the Talk button is depressed, the Call signal will be activated, causing the transmitter connected

to the TW-40 to be keyed. Audio on the intercom line will then be transmitted over the two-way radio.

When the Talk button is released, the Call signal will disappear and audio from the receiver of the two-

way radio will appear on the intercom line, allowing a reply.

Clear-Com System Installation Manual