10
Siemens Building Technologies
Cerberus Division
e1148c
06.2000
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
.
User provided device
Tx
GND
Rx
CBS-3
GND
Rx3
Tx4
GND
Tx3
Rx2
GND
Rx4
Tx1
GND
Rx1
Tx2
15
17
16
14
12
13
18
8
10
9
7
5
6
11
1
3
2
4
UART2
UART3
UART4
UART1
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
9600
4800
2400
1200
600
300
150
1
S1.7
ON
OFF
ON
OFF
ON
OFF
ON
OFF
S1.8
ON
ON
OFF
OFF
ON
ON
OFF
OFF
S2.1
ON
ON
ON
ON
OFF
OFF
OFF
OFF
2
S2.5
ON
OFF
ON
OFF
ON
OFF
ON
OFF
S2.6
ON
ON
OFF
OFF
ON
ON
OFF
OFF
S2.7
ON
ON
ON
ON
OFF
OFF
OFF
OFF
3
S3.3
ON
OFF
ON
OFF
ON
OFF
ON
OFF
S3.4
ON
ON
OFF
OFF
ON
ON
OFF
OFF
S3.5
ON
ON
ON
ON
OFF
OFF
OFF
OFF
4
S4.2
ON
OFF
ON
OFF
ON
OFF
ON
OFF
S4.3
ON
ON
OFF
OFF
ON
ON
OFF
OFF
S4.4
ON
ON
ON
ON
OFF
OFF
OFF
OFF
Tab. 5 Dip-switch settings for baud rate
