How Single Pair Ethernet Brings Ethernet to the Edge

Jan. 13, 2022
Designed to provide communication, power and extended distance cable runs, Single Pair Ethernet is poised to digitally connect analog devices, simple I/O, and sensors to industrial control networks.

Single Pair Ethernet (SPE) has been gaining attention across industry over the past few years because of its ability to use thinner cabling (thus reducing space requirements) due to its use of just two wires versus the four wires used in standard Ethernet cables. It’s also  being recognized for its ability to offer up to 10x longer distance runs, 80x the bandwidth, and 2x the power of standard Ethernet.

As industry transitions toward Industry 4.0 and its all-digital communication requirements, the advance of SPE is well-timed. Automation World has been covering how industrial networks are increasingly becoming the center of automated processes, much as  controllers have long been viewed.

“We tend to think of networks and controls as being separate things, but as we get to the edge on the industrial plant floors—the two are part of the same system,” says Mike Vermeer, engineering strategy manager, at Panduit, a supplier of electrical, industrial, and networking components. “In this regard, SPE devices are going to be part of the controls system design, but they will also have the Ethernet connection for monitoring, remote access, and data acquisition.”
Single Pair Ethernet explained.

As most Ethernet-connected devices on plant floors incorporate Ethernet managed switches and use multi-layer segmented networks, Ethernet programmable controllers and smart I/O distribution devices are now common elements of control systems, notes Mike Berg, senior business development manager at Panduit.

But when you look at the edge of the network, “the majority of connections are to non-processor devices, such as analog devices, simple I/O, and sensors,” Berg says. “The SPE format has been designed for both IT and OT standards to provide communication, power, and extended distance cable runs for these type devices.”
SPE is already being used in the process industries because it allows them to bring Ethernet to intrinsically safe areas and simplify the network and power design, says Vermeer. One significant advantage to SPE seen by process industry users is “the ability for a single device to simultaneously support multiple protocols over SPE, for example OPC-UA, Profinet, and Foundation Fieldbus,” he says. 

Companies in this Article

Sponsored Recommendations

Measurement instrumentation for improving hydrogen storage and transport

Hydrogen provides a decarbonization opportunity. Learn more about maximizing the potential of hydrogen.

Learn About: Micro Motion™ 4700 Config I/O Coriolis Transmitter

An Advanced Transmitter that Expands Connectivity

Learn about: Micro Motion G-Series Coriolis Flow and Density Meters

The Micro Motion G-Series is designed to help you access the benefits of Coriolis technology even when available space is limited.

Micro Motion 4700 Coriolis Configurable Inputs and Outputs Transmitter

The Micro Motion 4700 Coriolis Transmitter offers a compact C1D1 (Zone 1) housing. Bluetooth and Smart Meter Verification are available.