Chapter 2. CPU Features & SpecificationsGFK-2222AD April 2018 932.3.3 RX7i Embedded Ethernet InterfaceEthernet PortsThe RX7i embedded Ethernet Interface provides two RJ45 Ethernet ports. Either or both of these portsmay be connected to other Ethernet devices. Each port automatically senses the data rate (10 Mbps or100 Mbps), communication mode (half-duplex or full-duplex), and cabling arrangement (straight-throughor crossover) of the attached link. For Ethernet port pin assignments, refer to Chapter 5. See alsoEstablishing Initial Ethernet Communications, Section 3.4.1.For details on Ethernet communications, refer to the following manuals:PACSystems RX7i & RX3i TCP/IP Ethernet Communications User Manual, GFK-2224PACSystems TCP/IP Ethernet Communications Station Manager User Manual, GFK-2225CautionThe two ports on the Ethernet Interface must not beconnected, directly or indirectly to the same device. The hub orswitch connections in an Ethernet network must form a tree;otherwise duplication of packets may result.Ethernet Interface IndicatorsThe Ethernet Interface indicators consist of seven light emitting diodes (LEDs). All are single-color greenLEDs controlled by the Ethernet interface.▪ Ethernet Interface OK (EOK)▪ LAN online (LAN)▪ Status (STAT)▪ Two activity LEDS (LINK)▪ Two speed LEDS (100)The EOK, LAN, and STAT LEDs are grouped together and indicate the status of the Ethernet interface.Each Ethernet port has two green LED indicators, LINK and 100.• The LINK LED indicates the network link status and activity. This LED is illuminated when thelink is physically connected and blinks when traffic is detected at the port. Note that traffic atthe port does not necessarily mean that traffic is present at the Ethernet interface, since thetraffic may be going between ports of the switch.• The 100 LED indicates the network data speed (10 or 100 Mbps). This LED is illuminated if thenetwork connection is 100 Mbps.LED operation is described in the following tables.
