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Ethernet: How Fast Is It Really?

From Omron Electronics LLC
 

 
With the popularity and low cost of Ethernet hardware, industrial control systems are evolving toward this platform. Users be aware; proper network design and implementation is critical to fast reliable network throughput. Considerable confusion exists as to the actual capacity, reliability, and usability of Ethernet networks in the industrial control arena. There are many varieties of Ethernet hardware and media types, ranging from the traditional half-duplex 10Mbits/Second coax (10Base5) to the latest 1000Mbits/Second full-duplex Fiber Optic (1000Base-LX). The speed and throughput of an Ethernet network will vary among the different types. To complicate things further, the use of switches, routers, and repeaters change the timing characteristics and performance of Ethernet networks. This article will cover the question of how fast it's possible to communicate via the various types and configurations of Ethernet networks. It will also describe the effects on reliability and determinism due to system loading.
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Product Announcements
N-TRON, Corp. - 106FX2 Unmanaged Switch with Two Fiber Optic Ports
The N-TRON® 106FX2 is a low cost, unmanaged six port Industrial Ethernet Switch. It is housed in a hardened, metal, DIN-Rail enclosure, and is designed for use in industrial data acquisition,... (read more)
N-TRON, Corp. - Low Cost Unmanaged Ethernet Switches
N-TRON® 100 series Industrial Network Devices are designed to solve the most demanding industrial communications requirements while providing high throughput and minimum downtime. The 100 series... (read more)
N-TRON, Corp. - Managed Industrial Ethernet Switches
The N-TRON® 500 Series Industrial Ethernet Switches offer outstanding value, increased performance, and plug & play operation. N-VIEW OPC Server Software offers unmatched network monitoring... (read more)
ATOP Technologies, Inc. - Serial-to-Ethernet Server -SE5001-S5
SE5001-S5 1-port RS-422/485(D-sub)... (read more)
Balluff, Inc. - Industrial RFID Ethernet Processors
Balluff industrial RFID systems now support Ethernet, which offers higher communication speeds at lower network costs. (read more)
Microwave Photonic Systems, Inc. - Mode Conditioning Cable
The MPS-2600 Optical Mode Conditioning / Gigabit Launch Cable is designed to support Gigabit Ethernet 1000Base-LX network upgrades. (read more)
Topics of Interest
Determinism is the assurance that control/communication will occur in a set period of time. Ethernet was non-deterministic at first, and not widely used for industrial purposes. Ethernet switches... (Read More)
5.2 Ethernet Networking The original development of Ethernet LANs was at a data rate of 10 Mbps, using two different types of coaxial cable media. As Ethernet technology evolved and LANs became an... (Read More)
Remember when transmitting data at 300 bits per second over phone lines was considered state-of-the-art? These days, Fast Ethernet networks run over 300,000 times as fast, at 100,000,000 bits per... (Read More)
Chapter 14: Private Network Technologies Chapter 15: Private Networks Performance Testing Chapter 16: Network Interconnection Technologies and Testing Michael A. Pozzi Hewlett-Packard Co.,... (Read More)
2.4 Optical Ethernet in the MAN Ethernet began as a high-speed alternative to star-wired copper in premises networks and focused on serving local applications. Over time, Ethernet has been... (Read More)
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