RSTI-EP PROFINET I/O Controller User Manual
Section 2
GFK-2571R
May 2021
Installation
35
CAUTION
Do not connect two or more ports on the PROFINET Controller to the same device, either
directly or indirectly, unless Media Redund
ancy is enabled in the PROFINET Controller’s
configuration. If Media Redundancy will be used, do not close the network ring until after a
Media Redundancy configuration that contains one node as a Media Redundancy Manager
(MRM) has been downloaded to the PROFINET Controller. If a Media Redundancy Manager
is not present, packets can continuously cycle on the network, preventing normal
operation. For more information refer to Section 6:, Redundant Media.
2.7.2
RJ45 Port Connections
The RJ45 ports on the underside of the PNC001 module can be used for PROFINET network
connections or for general Ethernet communications on a 10BaseT, 100BaseTX, or
1000Base-T IEEE 802.3 network. Typical switches, hubs, or repeaters support 6 to 12 nodes
connected in a star wiring topology.
For embedded PROFINET Controllers, LAN2, when configured as an Ethernet port, does not
permit PROFINET functions. However, once configured as a PROFINET Controller, LAN2
continues to support the Ethernet modality. In other words, it is possible to have Ethernet
protocols running on the network while it is configured for PROFINET. This can be tolerated
so long as the Ethernet traffic does not impede or degrade PROFINET operations.
10BaseT: uses a twisted pair cable of up to 100 meters in length between a node and
another node, switch, hub, or repeater. 10Mbs may be used for the Command Line Interface
(CLI) and general Ethernet traffic, but not for PROFINET communications.
100BaseTX: uses a cable of up to 100 meters in length between a node and another node,
switch, hub, or repeater. The cable should be data grade Category 5 or better unshielded
twisted pair (UTP) or shielded twisted pair (STP).
1000BaseT: uses a cable of up to 100 meters in length between a node and another node,
switch, hub, or repeater. The cable should be data grade Category 5 or better shielded cable.
Network Cabling and Connector Types
Copper: up to 100 Meters between Devices
All these products use RJ45 connectors for copper connections. Copper cabling and
connections are easily available in the general market and support distances of up to 100m.
Figure 22: Interconnect using Copper Cables / RJ45 Connectors
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