2011-02 Installation and User Instructions 5 Call Stations

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21.2.2 Headset (X501)

The external interface for headsets consists of a pin header connector with 6 positions (see the PCB for the pin numbering).

table 21.3: X501 connector details

Pin Signal

1Mic

2GND

3Volume out

4Volume max. in

5GND

6Earphone

1

Microphone

 

2

 

R Volume

Headset

3

 

4

 

5

Earphone

6

figure 21.5: Headset connection diagram

The volume control (R) between pins 2, 3 and 4 must be a 10k logarithmic potentiometer.

Note

If a volume control is not needed, pin 3 and 4 must be connected to each other. The volume level of the earphone is then at its maximum.

table 21.4: X501 technical data

Supervision limits:

180 to 1400 Ω (dynamic microphone)

0.2 to 4.8 mA (electret microphone) Mic. input sensitivity:

-50 dBV

Input sensitivity control range: -7 to 8 dB

S/N:

60 dB +/- 3 dB at default sensitivity (mic.) typical 80 dB +/- 3 dB (earphone) Earphone impedance:

min. 16 ohm (typical 32 ohm) Crosstalk (earphone to mic): max. 40 dB ± 3 dB

Bandwidth:

340 to 14000 Hz

(-3 dB with respect to level at 1 kHz) Output power:

0.1 to 30 mW (typical 1 mW)

21.2.3 Microphone (X300 and X301)

The external interface for microphones consists of a pin header connector with 6 positions (see the PCB for the pin numbering). The following microphones were designed to be used in combination with the kit:

•LBB9081 Hand-held Dynamic Microphone (including resistors for switch supervision).

•LBB9082 Gooseneck Dynamic Microphone.

table 21.5: X301 connector details

Pin Signal

1Mic-

2GND

3Mic+

4--- not connected ---

5 PTT input contact

6GND

Bosch Security Systems 2011-02

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Bosch Appliances 3.5 manual Microphone X300, X501 connector details, X501 technical data, X301 connector details
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