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10
Siemens Building Technologies
Cerberus Division
5.3
Connection to an user-provided device
The serial line getting out of the CBS-3 uses the Cerban protocol. Be sure the device
you connect to it is able to unde rstand Cerban protocol.
The user-provided device can be connected to UARTs 3 and 4 only. These CBS-3 lines
are master lines and so the user-provided device must act as a slave .
CBS-3
18
17
16
15
14
13
12
GND
11
UART4
Rx4
10
Tx4
9
GND
8
UART3
Rx3
7
Tx3
6
GND
5
UART2
Rx2
4
Tx2
3
GND
UART1
2
Rx1
1
Tx1
Fig. 8 Connection to an user-provided device
6
Baud rates
The only protocol available with CBS-3 is Cerban, that requires a baud rate setting of
300 bauds.
The following baud rates apply to the subsystems connected either to the CPU or the
expansion board.
BAUD RATE
UART
Spare
S1.7
ON
1
S1.8
ON
S2.1
ON
S2.5
ON
2
S2.6
ON
S2.7
ON
S3.3
ON
3
S3.4
ON
S3.5
ON
S4.2
ON
4
S4.3
ON
S4.4
ON
Tab. 5 Dip-switch settings for baud rate
GND
User provided device
Tx
Rx
9600
4800
2400
1200
OFF
ON
OFF
ON
ON
OFF
OFF
ON
ON
ON
ON
OFF
OFF
ON
OFF
ON
ON
OFF
OFF
ON
ON
ON
ON
OFF
OFF
ON
OFF
ON
ON
OFF
OFF
ON
ON
ON
ON
OFF
OFF
ON
OFF
ON
ON
OFF
OFF
ON
ON
ON
ON
OFF
600
300
150
OFF
ON
OFF
ON
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
ON
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
ON
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
ON
OFF
OFF
OFF
OFF
OFF
e1148c
06.2000
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