Profibus-Dp Looped Through T Connectors; External Power Supply Fed Separately To Every Slave Station; Configuration Without Power Supply Connector - Siemens SIMATIC Distributed I/O System DP/ASi Link Manual

3.5

Configuration without Power Supply Connector

Definition
In a configuration with a separate power supply, every slave station is sup-
plied with power separately. This power supply must not be fed on the bus
cable.
The T connector for connecting PROFIBUS-DP is imperative for continuous
looping of the PROFIBUS-DP.
Advantage You do not feed the power supply over the bus (2-core instead of a 5-core
cable).
A slave station can be disconnected at any time from the bus without "bus
traffic" being interrupted for the slave stations beyond it, because the PROFI-
BUS-DP is looped through T connectors.
Cables
You use cables of different design for the installation:
Installation
Fig. 3-6 shows a possible installation for the configuration without a power
supply connector.
Figure 3-6
Distributed I/O System DP/ASi Link
EWA 4NEB 710 6055-02b
If you wish to use prefabricated Siemens cables, please turn to sec-
tion 4.4.4.
If you wish to prepare your own cables, please turn to section 4.4.7.
DP/ASi link
PROFIBUS-DP
Two-wire-
DP/ASi link
cable (!!)
PROFIBUS-DP looped through T connectors –

external power supply fed separately to every slave station

Configuration Options
External
power supply
External
power supply
3-7