# Single-pair Ethernet interface

Canonical URL: https://eloragrid.ai/symbols/single-pair-ethernet-interface
Publisher: Elora Grid
Updated: 2026-10-27
Lookup label: SPE
Drawing use: Schematic
Reference families: Manufacturer

A single-pair Ethernet interface uses its specified physical-layer arrangement over one conductor pair.

## In plain English

### What does Single-pair Ethernet interface mean?

A single-pair Ethernet interface uses its specified physical-layer arrangement over one conductor pair.

### A simple example

A compatible industrial node can use the selected PHY and connector for its single-pair link.

### What the drawings help you do

Label the specific single-pair Ethernet variant and identify both cable ends. One pair describes the conductor arrangement, not a universal speed, distance or connector. Show any power-over-data arrangement separately and only where the selected equipment supports it.

### Before using this reference

- State the selected single-pair physical-layer variant.
- Reference the supported connector and cable design.
- Identify any power-delivery function separately.

### Do all single-pair Ethernet devices connect interchangeably?

No. The physical-layer variant, connector, cable and supported operating conditions must match. A common conductor count does not establish interoperability.

### Terms

- Single pair: One pair of conductors used by the selected link.
- Physical layer: The electrical and transmission arrangement of a communication link.

Concept diagram: Compatible controller interface → Single-pair Ethernet PHY → One specified conductor pair
Original functional explanation. Arrows show information or energy roles; two-headed arrows identify two-way interfaces. This is not a pinout, certified standards graphic or complete circuit.

- [Ethernet physical interfaces](https://www.ti.com/product-category/interface/ethernet-ics/overview.html)


## What it represents

A single-pair Ethernet interface uses its specified physical-layer arrangement over one conductor pair.
A compatible industrial node can use the selected PHY and connector for its single-pair link.
Label the specific single-pair Ethernet variant and identify both cable ends. One pair describes the conductor arrangement, not a universal speed, distance or connector. Show any power-over-data arrangement separately and only where the selected equipment supports it. This is original functional artwork, not a certified standard graphic or device pinout.

## How to read it

- State the selected single-pair physical-layer variant.
- Reference the supported connector and cable design.
- Identify any power-delivery function separately.
- The single-pair label does not make every Ethernet variant or connector interchangeable.

## Information to show or reference

- State the selected single-pair physical-layer variant.
- Reference the supported connector and cable design.
- Identify any power-delivery function separately.

## Important distinction

The single-pair label does not make every Ethernet variant or connector interchangeable.

## Facts

- Representation type: Original functional block; not a certified IEC or IEEE graphic
- Concept input: Compatible controller interface
- Concept output: One specified conductor pair

## Public references

- [Ethernet physical interfaces](https://www.ti.com/product-category/interface/ethernet-ics/overview.html) — Texas Instruments. Ethernet physical interfaces: public technical context for the named function. Product and compliance details remain with the publisher.

## Graphic scope

Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.