Single Pair Ethernet: the cornerstone for the Smart Factory
The upgrade for the field level
Single-pair Ethernet cables are copper cables that contain just one twisted conductor pair (single pair) and are primarily intended for data transmission in industrial applications. Conventional Ethernet cables from the LAN area or industrial Ethernet cables have two or four conductor pairs, depending on the data transmission rate. Single Pair Ethernet is a slim, lightweight and material-saving development of industrial Ethernet. SPE enables a consistent and uniform network infrastructure down to the field level. Ethernet networking of field devices, such as sensors and actuators, enables real-time data to be collected and analyzed.
SPE replaces conventional fieldbuses
Classic Ethernet, which already connects all upper layers in the automation pyramid, is unsuitable for connecting the lowest field level. The cables are oversized and complex to connect. Companies therefore still rely on conventional fieldbus systems, which regulate the exchange of information between the sensor and actuators with the control level (PLC). However, these bus systems no longer meet the extensive requirements of a smart factory. These systems and their associated cables are now being replaced by Single Pair Ethernet.
Advantages of Single Pair Ethernet
- Replacing fieldbus systems for a future-proofed smart factory
- Standardization of technology in IP-based networks, from the sensor to ERP and the cloud
- Material, weight, and cost savings and significantly less space required.
- Single pair cable design for fast, easy installation and fewer errors during assembly
- Cost effectiveness through the elimination of gateways as "translators"
- Power-over-Data-Line for supplying terminal devices with up to 50 watts
- Open standard with compatible cabling components for universal use in the entire automation industry
What's next with SPE?
Standards ensure a quick entry into practice:
- The protocol standards according to IEEE 802.3 define the technical framework conditions for Single Pair Ethernet data transmissions in industrial applications.
- The industrial connector face "T1 Industrial Style" is standardised by IEC 63171-6.
SPE standard | Bit rate | Cable length point to point | |
|---|---|---|---|
| shielded | unshielded | ||
| IEEE 802.3ch | 2.5/5.10 Gbit/s | 15 m | - |
| IEEE 802.3bp | 1 Gbit/s | 40 m | 15 m |
| IEEE 802.3bw | 100 Mbit/s | 40 m | 15 m |
| IEEE 802.3cg | 10 Mbit/s | 1000 m and more | - |
LAPP is a member of the SPE Industrial Partner Network, a consortium of industry leading companies working together to drive SPE technology break through."
The network of partners aims to create an integrated SPE infrastructure: The innovative technology should not only guarantee reliable data transmission, but also provide standardized interfaces and system components. The foundation for this has already been laid by defining standards and working closely with international standards committees.
Ethernet Advanced Physical Layer: SPE for the process industry
Ethernet APL is the booster for networking at the field level – especially for the process industry. Single Pair Ethernet with its consistent networking using one protocol is used as the basis. Ethernet APL extends this to include intrinsic safety for areas at risk of explosion with all the benefits of SPE.
LAPP offers an extensive portfolio for setting up Ethernet-APL networks with single-pair Ethernet cables.