US 12,218,775 B2
Advanced physical layer (APL) adapter for legacy field devices
Theodore Henry Schnaare, New Prague, MN (US); Eric Russell Lovegren, Monticello, MN (US); Yevgeny Yurevich Korolev, Maple Grove, MN (US); Robert Michael Weinberger, Prior Lake, MN (US); Marshall Leon Meier, Waconia, MN (US); and Eric Darrell Rotvold, Mendota Heights, MN (US)
Assigned to ROSEMOUNT INC., Shakopee, MN (US)
Filed by Rosemount Inc., Shakopee, MN (US)
Filed on Dec. 19, 2022, as Appl. No. 18/084,057.
Prior Publication US 2024/0205041 A1, Jun. 20, 2024
Int. Cl. H04B 1/38 (2015.01); H04L 5/16 (2006.01); H04L 12/28 (2006.01)
CPC H04L 12/2801 (2013.01) 27 Claims
OG exemplary drawing
 
1. An Advanced Physical Layer (APL) adapter for enabling functional interconnection of a 2-wire APL spur to at least one industrial process legacy field device, the adapter comprising:
a first pair of terminals configured for connection to the 2-wire APL spur;
APL physical layer (PHY) circuitry capacitively coupled to the first pair of terminals;
a second pair of terminals;
connectivity circuitry configured to communicate with a legacy field device connected to the second pair of terminals in accordance with a legacy communication protocol and control the APL PHY circuitry to communicate through the first pair of terminals in accordance with an Ethernet protocol; and
wherein the connectivity circuitry is configured to receive, translate and/or forward writes and configuration changes to a connected legacy field device and communicate acknowledgements from the connected legacy field device to an external device via the APL PHY circuitry.