Configuration With Several Power Supply Connectors; Length Of Bus Cable When Profibus-Dp And Power Supply; Are Fed On The Same Bus Cable - Siemens SIMATIC Distributed I/O System DP/ASi Link Manual

Configuration Options
3.4

Configuration with Several Power Supply Connectors

Constraint for
In configurations with a power supply connector (refer to sections 3.2 and
installation with 3.3), the power supply is fed along the bus cable.
one power supply
This configuration is limited by the following factors:
connector
Table 3-2
< 1 A
< 2 A
< 4 A
Remedy You make allowance for several power supply connectors per segment.
Fig. 3-5 shows a possible installation for the configuration with several
power supply connectors.
Figure 3-5
3-6
If the power supply and the PROFIBUS-DP field bus are fed on the same
cable, the following values apply to the length of the bus cable between
the power supply connector and the last slave station connected:

Length of bus cable when PROFIBUS-DP and power supply

are fed on the same bus cable

Current Loading
Not more than 4 A may be looped through the power supply connector.
The input power of the ET 200 modules and of the DP/ASi link limits the
number of modules that you can connect.
External
power supply
PS-
SV
cntr
PROFIBUS-DP
PROFIBUS-DP
External
power supply
PS-
PS
cntr
1
In this case you can use a 2- or 5-core cable, because the two "left" con-
nections for "external power supply" and "PROFIBUS-DP" are not
bridged.
Configuration with several power supply connectors
Max. Cable Length
80 m
40 m
20 m
DP/ASi link
1
DP/ASi link
DP/ASi link
Distributed I/O System DP/ASi Link
EWA 4NEB 710 6055-02b