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by MisterTea
1778 days ago
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This gear will get cheaper soon. There is a big push in the Industrial automation world to get TSN/PTP deployed more widely and perhaps universally. The idea is to eliminate the dichotomy of real time vs non real time Ethernet networks in control systems from the plant network down to the machine level. This way you can send EtherCAT frames at equidistant intervals to servo drives in the microsecond range while casually streaming SPC data or Netflix over the same wire. This is also in conjunction with the newer single pair Ethernet tech that the Automotive world is also interested in. |
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For anyone wondering:
> In addition to the more computer-oriented two and four-pair variants, the 100BASE-T1 and 1000BASE-T1 single-pair Ethernet PHYs are intended for automotive applications[17] or as optional data channels in other interconnect applications.[18] The single pair operates at full duplex and has a maximum reach of 15 m or 49 ft (100BASE-T1, 1000BASE-T1 link segment type A) or up to 40 m or 130 ft (1000BASE-T1 link segment type B) with up to four in-line connectors. Both PHYs require a balanced twisted pair with an impedance of 100 Ω. The cable must be capable of transmitting 600 MHz for 1000BASE-T1 and 66 MHz for 100BASE-T1.
> Similar to PoE, Power over Data Lines (PoDL) can provide up to 50 W to a device.[19]
* https://en.wikipedia.org/wiki/Ethernet_over_twisted_pair#Sin...
> The IEEE 802.3bu-2016[12] amendment introduced single-pair Power over Data Lines (PoDL) for the single-pair Ethernet standards 100BASE-T1 and 1000BASE-T1 intended for automotive and industrial applications.[13] On the two-pair or four-pair standards, power is transmitted only between pairs, so that within each pair there is no voltage present other than that representing the transmitted data. With single-pair Ethernet, power is transmitted in parallel to the data. PoDL defines 10 power classes, ranging from .5 to 50 W (at PD).
* https://en.wikipedia.org/wiki/Power_over_Ethernet#PoDL
100BASE-T1 is IEEE 802.3bw-2015, 1000BASE-T1 is IEEE 802.3bp-2016. 2.5 Gb/s, 5 Gb/s, and 10 Gb/s over a single pair is 802.3ch-2020: the focus of these is in the embedded automotive space.
* https://blog.siemon.com/standards/ieee-p802-3ch-multi-gig-au...