Connection Examples
The total length of the bus cable must not exceed the specified lengths. The following
table indicates physical limitations valid for specific transmission rates:
Baud rate Max. bus length
50 kBd 1000 m
125 kBd 500 m
250 kBd 250 m
500 kBd 100 m
1000 kBd 25 m
The number of bus nodes is also limited by the specification according to ISO 11898.
The limiting value is between 32 and 100 bus nodes. depending on the used cable and
transmission rate. For further information on the maximum number of bus nodes refer to
the document “CAN Physical Layer” by the user organization CiA e. V.
8.9.2 COM1 – RS232 Interface
COM1 - RS232 interface 1
Fig. 46: RS232 interface (X19)
Fig. 46: RS232 interface (X19)
If you connect X19 to a standard RS232 interface of a PC (9-pole male submin D con-
nector), the used cable must be constructed as follows:
Fig. 47: RS232 cable
Fig. 47: RS232 cable
82 Drive System SD2M - Hardware Description 036228xxF
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