Omron CJ1W-FLN22, Operation Manual, Page: 217 / 277

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System Configuration Appendix A
Other Ethernet Specifications
The 10Base-2 standard is an Ethernet connection method that uses 5-mm wide coaxial cables (also called thin
cables). The “10” in 10Base-2 indicates a baud rate of 10 Mbps. “Base” indicates that a baseband transmission
method is used. The “2” indicates a transmission distance of 185 m for the trunk line (approximately 200 m).
Personal computers and other Ethernet-compatible devices are connected to the 10Base-2 Ethernet by con-
necting a T-branch connector to the BNC connector of each device, with coaxial cable connected to the other
two connectors on the T-branch connectors.
The following diagram shows a 10Base-2 Ethernet configuration example.
Optical Ethernet
Optical Ethernet uses optical fiber cables as the transmission media. Optical Ethernet is used in systems that
require a transmission distance of 500 m or more or that require resistance to noise. Optical Ethernet connec-
tion methods standardized by IEEE802.3 include 10Base-FP, 10Base-FB, 10Base-FL, 100Base-FX,
1000Base-LX, and 1000Base-SX.
The following diagram shows an Optical Ethernet configuration example.
Wireless Ethernet
Wireless Ethernet is a wireless LAN that uses electromagnetic waves and infrared rays as the transmission
media. This method is used to connect portable devices to the LAN. Standardization of wireless LAN is being
pursued by the IEEE wireless LAN Working Group IEEE802.11. The MAC layer protocol for a wireless LAN is
different from Ethernet. A bridge is therefore needed to interconnect the two types of networks.
The following diagram shows a wireless Ethernet configuration example.
Terminating
resistance
Coaxial cable (RG58A/U)
(Length: 185 m max.)
Branch
connector
10Base-5 system
Optical repeater
Optical-fiber cable
(Length: 2 km max.)
Optical transceiver
2.4 GHz
Wireless bridge
10Base-5 system
Wireless adapter