Bosch Appliances 3.5 manual 3: X11 connector details, 5: Headset connection diagram

2011-02 Installation and User Instructions 5 Call Stations

en 219

Note

Do not combine control input wires of multiple control inputs (e.g. do not use a common return wire).

Note

If a volume control is not needed, pin 2 and 3 must be connected to each other. The volume level of the earphone is then at its maximum.

18.2.2 Headset (X11)

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

table 18.3: X11 connector details

Pin	Signal
1	Mic
2	GND
3	Volume control voltage
4	3.3 V supply output
5	GND
6	Earphone

1

Microphone
2
R Volume	Headset
3
4

5

Earphone

6

figure 18.5: Headset connection diagram

Note

The linear resistor R (typical value: 10 kohm) is used to create a control voltage from the supply voltage.

table 18.4: X11 technical data

Supervision limits for dynamic microphone: 180 to 1400 ohm

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 Ω) 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:

0.1to 30 mW (typical 1 mW) Volume control voltage:

0 to 3.3 V

Bosch Security Systems 2011-02