Siemens SIMATIC Distributed I/O System DP/ASi Link, Руководство пользователя

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3-10
Distributed I/O System DP/ASi Link
EWA 4NEB 710 6055-02b
Both the 2-core cable and the 5-core cable can be connected to the program-
mer connector.
A programmer connector may be placed anywhere on the PROFIBUS-DP
field bus. When doing so, pay attention to the following:
Since a terminating resistor cannot be inserted, the programmer connector
must not be located at the ends of the bus line.
You may place several programmer connectors on the bus. However, you
may connect only one programmer to one of the programmer connectors
on the bus, since the programmer represents a node having the station
number 0.
For connecting a programmer, the following values apply to the length of
the spur line as a function of the baud rate on the PROFIBUS-DP bus:
Table 3-3 Length of the spur line of the programmer connection as a function of
the baud rate on the PROFIBUS-DP bus
Baud Rate Max. Length of Spur Line
< 500 kBd Max. 32 3 m
Max. 10 5 m
Max. 1 10 m
1500 kBd Max. 5 2 m
(3 m spacing)
or
PROFIBUS bus terminal
> 1500 kBd Max. 1 1.5 m
Rule for
connection of
programmer
connector
Configuration Options