User Manual

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 understand 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