Omron CS1W-FLN22 Operation Manual page 217

System Configuration
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.
Branch
connector
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.
Optical transceiver
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.
Wireless adapter
Coaxial cable (RG58A/U)
(Length: 185 m max.)
Optical-fiber cable
(Length: 2 km max.)
10Base-5 system
2.4 GHz
Terminating
resistance
10Base-5 system
Optical repeater
Wireless bridge
Appendix A
191