Chapter 2. Installation
GFK-2892F
March 2019
25
2.6
Ethernet Port Connections
As noted earlier, PROFINET IO operates at 100Mbps or higher (full duplex). The GCG001 Genius Gateway
cannot operate at a data rate greater than 100Mbps. Thus, for normal operation, at least one port must be
operated at 100Mbps. Other devices operating at 10Mbps may co-exist on that network, though this would not
be typical.
Each Ethernet port on the GCG001 module (see Figure 3) operates independently, so devices that operate at
different speeds and/or duplex modes may be attached to the ports. Each port automatically detects the
attached cable and functions properly with either straight-through or crossover cables.
Note:
The module operates only in auto-negotiate mode. All PROFINET devices and switches
that are connected to the module should be configured to use auto-negotiation.
RJ-45 Port Connections
The two RJ-45 ports on the GCG001 Genius Gateway can be used for PROFINET network connections or for
general Ethernet communications on a 10BaseT or 100BaseTX IEEE 802.3 network; 1000BaseTX is not
supported. If the port is connected to an external switch, hub, or repeater, up to 12 PROFINET nodes may be
connected in a star wiring topology. Cables may be up to 100 meters in length. Cables for 100BaseTX must be
data grade Category 5 or better unshielded twisted pair (UTP) or shielded twisted pair (STP). 10BaseT may be
used for the general Ethernet traffic, but not for PROFINET communications.
