Specifications

among all intercom channels. Each channel provides a CALL switch , a MIC on/off switch

(TALK) , a LISTEN on/off switch , and a listen level control that allows to listen to the

channels independently, or a mix between the channels.

The program input allows to insert external audio signals in the intercom system. The

external audio signals could be sent to each channel or to the headphones, independently.

The headset microphone signal is available to drive external P.A. systems. Relay

contacts are provided that follows the P.A. key action , helping the installer to automate

multiple tasks as Tally, switching speakers, cue lights, etc.

System Expandability permits creating a multichannel (8, 12, or more channels) intercom

System by using more Master Stations in a daisy chain arrangement. This feature enables

freedom in System design and in-site future upgrades. Rental companies can benefit in lower

component inventories.

The global all mic (Mic-Kill) and buzzers (Buzz-Kill) mute systems in both channels,

allows to control the line noise due to many open mics in the system, as well as the ambient

silence.

PANEL MIC CONNECTION

There is a 4-pin XLR-4M connector (XLR-4-32) , to connect a dynamic microphone

gooseneck type to the base station. Electret mics are not allowed.

The microphone gain is adjustable by a potentiometer (PANEL MIC GAIN) between

+20 and +50 dB.

The following table shows the XLR correspondence Pin:

XLR-4-32 – PANEL MIC

PIN 1 0 V (MICROPHONE)

PIN 2

SIGNAL (MICROPHONE)

HEADSET CONNECTION

A XLR-4 type connector (XLR-4-32) connector , allows connecting a headset with

microphone to the master station. The headset impedance must be 200 Ω or higher (up to 2

KΩ) and the microphone must be dynamic or electret type.

The microphone preamplifier gain can be configured with an internal preset in +30 or

+40 dB. (Factory set-up adjusted to +40 dB)

For the electret microphone type it is necessary to enable the phantom power of 9

VDC with an internal preset. In order to obtain more information, consult the base station

internal adjustment settings section. The next list shows the XLR pins correspondence:

HEADSET XLR-4-32

PIN 1 0 V (MICROPHONE)

PIN 2

SIGNAL (MICROPHONE)

PIN 3 0 V (HEADPHONES)

PIN 4 SIGNAL (HEADPHONES)

EF-202/EF-204 MASTER STATION – E200 SERIES

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