Ethernet Port Connections; Profinet Network Connections; Rj45 Port Connections; Figure 21: Ethernet Ports On Pnc001 Module - GE PACSystems RX3i User Manual

2.7

Ethernet Port Connections

Each port on an RX3i PROFINET Controller operates independently. This is true for all ports on the PNC001
module and for ports assigned to embedded PROFINET Controllers. In this way, devices that operate at
different speeds and/or duplex modes may be attached to a compatible port. Each port automatically detects
the attached cable and functions properly with either straight-through or crossover cables.
Note: All PROFINET Controller ports operate in auto-negotiate mode only. All PROFINET devices and
switches that are connected to the PROFINET Controller should be configured to use auto-
negotiation.
2.7.1

PROFINET Network Connections

Connections to the PROFINET Controller can be made using standard cables. The PROFINET Controller can be
connected to only one PROFINET network. However, different devices on the same LAN can be connected via
more than one port.
Note: Shielded cable is required for 1 Gbps operation.
Do not connect two or more ports on the PROFINET Controller to the same
device, either directly or indirectly, unless Media Redundancy 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
Caution
normal operation. For more information refer to Chapter 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.
GFK-2571N

Figure 21: Ethernet Ports on PNC001 Module

May 2018
Chapter 2. Installation
37