bittner XB400 - I 2 C Data Port; Rs-485

2 Technical Features Page 19
After the amplifier has been connected to the SXL II, it will be automatically recognized. The Link LED on
the SXL II front panel indicates ON. Communication with the SXL II unit is indicated by the fast blinking
green (TX) LED on the amplifier’s rear panel.
For more details please refer to SXL II section 3.14.
2.11.1 I
2
C
Figure 2.11: I
2
C Data Port
Pin Function
1 SDA I
2
C Data
2 SCL I
2
C Clock
3, 11 +12V Supply
4, 6, 8, 9, 10, 12, 14 Ground Supply
5, 7, 13, 15 n/c
Caution
The 12V supply drives the Data-Interface of an amplifier in case the mains supplies have been
turned off or interupted.
2.11.2 RS–485
The RS–485 interface on the XR Series amplifiers is a half-duplex transceiver with one single bus (2-wire)
for transmitting and receiving data on the same bus.
DATA+ is pulled via 10k resistor to +5V volts and DATA- is pushed to RS–485 GND via 10k in idle state.
Figure 2.12: RS–485 Data Port
Figure 2.13: RS–485 Connector
c
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