Introduction to Single-Pair Ethernet | What You Need to Know

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⌚Timestamps:
00:00 - Intro
00:27 - Transmission using one pair of wires
01:00 - PoDL
01:27 - IEEE 802.3 standards
02:07 - Protocols
02:32 - Benefits of SPE
03:18 - PoDL vs. PoE
04:17 - Ethernet APL vs. SPE
05:00 - Cables and connectors
05:53 - Topologies
06:33 - SPE devices and sensors
07:11 - Hazardous areas

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Single-Pair Ethernet (SPE) is a new Ethernet communication standard for factory, process, and building automation that will enable a more rapid deployment of integrated strategies, such as the Industrial Internet of Things.

In this video, we will introduce you to the basics of Single-Pair Ethernet and will explore what you need to know to be ready to consider SPE for your plant or facility.

1) Single-Pair Ethernet describes the transmission of Ethernet using only one pair of copper wires. This simple two-wire system is able to deliver data rates of up to 1 Gigabits/second.

2) Single-Pair Ethernet can also deliver a simultaneous power supply to end devices using what is called PoDL, or Power over Data Line.

3) Single-Pair Ethernet is represented by a new group of IEEE 802.3 standards.

4) Single-Pair Ethernet communicates across the common industrial Ethernet protocols available today, such as Ethernet/IP, Profinet, and EtherCAT.

This allows existing control devices, such as PLCs, which operate on these industrial ethernet protocols to interface to Single-Pair Ethernet subnetworks via the use of SPE Field Switches.

5) The use of SPE Field Switches and Ethernet-connected devices means IP communication can be brought down to the lowest automation level, offering full transparency from sensors and actuators all the way up to the cloud.

Other benefits of Single-Pair Ethernet include reduced wiring costs, reduced node costs, reduced power consumption, and data communications via a single pair of wires.

6) Single-Pair Ethernet using Power over Data Line is not the same as Power over Ethernet, often referred to as PoE. PoE requires a special network switch with one device connected to each port using a CAT5 cable.

7) Single-Pair Ethernet and Ethernet APL are not interchangeable terms. Ethernet APL, for Advances Physical Layer, is a specific version of Single-Pair Ethernet.

8) Conventional CAT5E and CAT6 cables cannot be used to connect Single-Pair Ethernet devices.

Cables as defined by Standards IEC 63171-6 and IEC 63171-7 have been developed for SPE to ensure interconnectivity between SPE devices.

9) Single-Pair Ethernet networks can be constructed to connect devices and sensors in a number of different topologies, including point-to-point (from an SPE switch to device using a dedicated cable) and multi-drop for connecting up to eight separate devices.

10) While several manufacturers have SPE field network switches available, SPE-enabled sensors and devices are not yet being marketed.

11) Electrically-classified areas pose additional burdens on automation engineers in the design of systems that are safe for use in hazardous areas.

Single-Pair Ethernet, along with advances in intrinsically-safe barrier technology for communication networks, provides an opportunity to extend Ethernet to these plant-level areas.

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We invite you to become a RealPars Pro Member so that you have access to our full course on Single-Pair Ethernet, sponsored by TE Connectivity and RealPars: https://learn.realpars.com/courses/single-pair-ethernet-fundamentals

Upon successful completion of the course, you will receive a certificate signed by TE Connectivity ( @teconnectivity ).

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