Bosch Appliances 9922 141 70691 en manual Audio inputs, Connections, Cmrr

DCN Wireless Installation and User Instructions Contribution Devices

en 102

19.6.3 Audio inputs

You can connect microphone or line level signals to the audio inputs of the dual delegate interface. The audio inputs have DIN-8p-262° sockets (refer to figure 19.6).

table 19.9: Audio inputs

Number of connections:

2x DIN-8p-262° sockets Location:

8

3

5

6

7

1

4

2

Left side

Cable:

Shielded cable

Audio levels:

Refer to appendix A

Impedance:

Selectable:

• Asymmetric mic.: > 4 kΩ
•	Symmetrical dynamic mic.: > 2 x 33 kΩ
•	Symmetrical phantom mic.: > 2 x 680 Ω
Phantom supply:

figure 19.6: Audio input, connection

table 19.7: Audio input, connection

Pin	Signal
1	Signal in, +
2	Microphone, common
3	Signal in, -
4	Microphone LED (max. 2 mA)
5	Request-to-speak LED (max. 7 mA)
6	Microphone button
7	+12 V(DC) (max. 20 mA)
8	LED ring control
table 19.8: Connections
Pin	Component
4 (-) to 7 (+)	Microphone on LED
5 (-) to 7 (+)	Request-to-speak LED
6 to 7	Momentarily microphone switch

12 V(DC) ± 10%, max. 15 mA

Signal-to-noise ratio:

> 90 dB

CMRR:

> 85 dBA @ max. level

Crosstalk between inputs:

> 40 dB

Bosch Security Systems 2007-02 9922 141 70691 en