Telex IFB-1000 General, Operation, Connector PIN Configurations, Specifications

GENERAL

The Audiocom® IFB-1000 is a one-channel listen only IFB belt pack.

OPERATION

SYSTEM POWER

The IFB-1000 belt pack receives power externally, via the intercom channel.

IFB-1000 SETUP

The channel termination is set for balanced operation, which is compat- ible with other Audiocom equipment.

The headset/earset jack is set for 150 ohm operation.

EXTERNAL CONNECTIONS & CONTROLS

1 2

3 4

HEADSET

IFB-1000

1.Volume Control.

Use this control to adjust the headset/earset listen level.

2.On Indicator

This LED glows green when the belt pack is connected to an intercom channel that is functioning.

3.Headset Connector

This connector accepts a wide-response earset, such as the Telex EMV-2 (catalog number 60194-001), with a 1/4” monaural phone plug.

4.Intercom Channel Connectors

The IFB-1000 intercom channel is connected via a 3-pim female connector. The IFB-1000 is powered from the intercom system power supply and will turn on with the intercom system.

CONNECTOR PIN CONFIGURATIONS

HEADSET CONNECTOR

Type: 1/4” Monaural Plug

Sleeve Headset audio low

Tip Headset audio high

INTERCOM CHANNEL CONNECTORS

Type: XLR-3F

Pin 1 Common

Pin 2 Intercom audio and +24 VDC input

Pin 3 Intercom audio and +24 VDC input

SPECIFICATIONS

GENERAL:

Channel Supplied Power Requirements:

+24 VDC nominal (standard Audiocom line), 50 to 80 mA

Environmental Requirements:

Storage: -20°C to 80°C; 0% to 95% humidity, non-condensing

Operating: 0°C to 50°C; 0% to 95 % humidity, non-condensing

Dimensions:

3.25” (82.6 mm) H x 3.5” (88.9 mm) W x 1.8” (45.7 mm) D

Weight:

1.0 pounds (0.45 kg)

INTERFACE REQUIREMENTS:

Earset:

150 to 600 ohm headphones

Balanced Intercom Channel Level & Impedance: 1 Vrms nominal; 300 ohms ±5%

Noise Contribution:

Less than -60 dB on the line.

HEADPHONE AMPLIFIER:

Voltage Gain:

27 ±3 dB from the line

Maximum Output:

60 mW into 150 ohms

Frequency Response:

200 Hz to 8 kHz +1/-3 dB