Bosch Appliances 3.5 manual External speaker, Keypad interface, 9: X142 connector details

2011-02 Installation and User Instructions 5 Call Stations

en 223

The value of resistor R in figure 18.9 depends on the voltage of the external source, the forward voltage of the LED and the current flowing through the LED:

Vsource – Vforward

R = --------------------------------------------

I

For example, the voltage of the external source is 24 V, the forward voltage of the LED is 2 V and the current flowing through the LED is 10 mA, then:

R =	24 – 2	= 2200 (Ω)
	10--------------------⋅10–3

Warning

Do not connect DC or AC signals to the control inputs, otherwise the input circuit may be damaged. Only use voltage-free contacts.

18.2.5 External speaker (X142)

The external interface for external speakers consists of a pin header connector with 6 positions (see the PCB for the pin numbering.) When using an external loudspeaker, also connect a volume control (see section 18.2.2).

table 18.9: X142 connector details

Pin	Signal
1, 2, 3	Speaker +
4, 5, 6	Speaker -

table 18.10: X142 technical data

Impedance:

8 to 32 ohm Signal/Noise ratio:

typical 80 dB ± 3 dB at max. output Output power:

typical 100 mW, max. 300 mW

18.2.6 Keypad interface (X143)

The external interface for the keypad (kits) consists of an IDC connector with 16 positions. Keypads are connected in series. That means there is only a direct connection between the call station kit and the first keypad. The second keypad is connected to the first, the third to the second etc. using standard flat cables.

table 18.11: X143 connector details

Pin	Signal
1	Synchronization line.
2	GND
3	Interrupt line (INT)
4	GND
5	Data I2C (SDA)
6	GND
7	Clock I2C (SCL)
8	GND
9	Power
10	GND
11	Power
12	GND
13	Power
14	GND
15	Power
16	GND

Bosch Security Systems 2011-02