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1
I/O Station Capacity
Network Topology
Installation
Features
Chapter
1-8
Chapter
Up to 32 IO devices can be connected to a Network Adapter (STXPBS001,
STXPNS001) whereas. PROFIBUS network adapters with integrated IO support only
up to 8 IO modules. The power consumption of all the modules in the node should be
calculated and ensured that it does not exceed the capacity of Network Adapter and
power modules.
The sum of all input and output data can be up to:
504 bytes per station for a PROFINET network
256 bytes per station for a PROFIBUS network
The maximum number of I/O stations per RX3i Profinet controller is 128 and for Rx3i
profibus Controller is 125
For PROFIBUS networks, I/O stations can be connected via linear bus architecture with
active bus termination at both ends. Devices in a PROFIBUS network connect directly to
the bus cable or indirectly via stub lines.
For PROFINET networks, I/O stations can be connected using either linear or star
architecture.
The Network Adapter must be connected to the left of the other RSTi modules in the I/O
station.
Within the RSTi station the bus connection, power supply, and power distribution are
completed by connecting modules together on the DIN rail. Sensors and actuators are
wired to the RSTi modules using spring clamp terminals on the module's removable
terminal strips. These terminal strips can be keyed so that they cannot be accidentally
swapped. If a module must be replaced, the wiring does not need to be removed; just
remove the terminal strip from the module.
An All-in-One PROFIBUS Network Adapter that includes built-in digital I/O is available. It
combines the advantages of slice-type and block-type construction and offers reduced
system design and maintenance costs. You can add up to eight IO modules to the All-in-
One adapter.
Modules can be easily installed and connected without tools.
Flexible and modular structure allows I/O stations to be easily expanded.
A comprehensive selection of I/O modules supports a wide range of applications.
Small removable terminal blocks conserve panel space and save time making system
connections.
By using Pin Slide way for stable system configuration, the contact between modules
can be maximized after module connection.
Module-based diagnostic functions
The amount of costly parallel wiring is reduced. Within a station, voltage and data
routing can be carried out without additional wiring, reducing the cabinet space
needed.
RSTi Network Adapter Manual User Manual - January 2012
GFK-2746
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