Connecting Interfaces For Communication - Siemens SIMATIC ET 200SP HA System Manual

Wiring

6.8 Connecting interfaces for communication

6.8 Connecting interfaces for communication
Installing a PROFINET cable on the BusAdapter
Depending on the configuration of the PROFINET IO system, you select electrical or optical
PROFINET IO cables for the connection of the distributed I/O.
● Electrical PROFINET IO cables:
– PROFINET cable with RJ45 connector (electrical)
– Connecting a FastConnect cable directly to the BusAdapter (electrical)
● Optical PROFINET IO cables:
– Fiber-optic cable with LC connector (optical)
The type of connecting cable determines the BusAdapter required for connecting the
distributed I/O.
Note
Strain relief of the bus cables
Make sure to secure the bus cables by installing an appropriate strain relief. Refer to the
installation guidelines of the manufacturer.
PROFINET IO loop-through
2-port switches are integrated in all BusAadapters of ET 200SP HA. These switches allow you
to loop-through the PROFINET IO system from one station to the next.
Number of media interfaces
Avoid a network structure in which there are more than 4 interfaces between electrical and
optical media in a PROFINET IO system between the CPU and any IO device.
From this it follows, for example:
● CPU > Media Interface > IO Device > IO Device > Media Interface > Media Interface > IO
Device > Media Interface > IO Device
Result: Configuration of PROFINET IO system OK
● CPU > Media Interface > Media Interface > IO Device > > Media Interface > Media Interface
> IO Device > > Media Interface > Media Interface > IO Device
Result: Configuration of PROFINET IO system NOT RECOMMENDED
96
- 8-wire cable
- 2-wire cable - 2-wire transfer function (variable distance)
ET 200SP HA Distributed I/O system
System Manual, 08/2019, A5E39261167-AD