US 11,729,018 B2
HVAC controller area network hybrid network topology
Ramon Portillo, Tyler, TX (US); Neal Harrington, Tyler, TX (US); Nathan Smith, Whitehouse, TX (US); Caleb A. Davis, Whitehouse, TX (US); and Brad T. Wilson, Tyler, TX (US)
Assigned to Trane International Inc., Davidson, NC (US)
Filed by Trane International Inc., Davidson, NC (US)
Filed on Sep. 1, 2021, as Appl. No. 17/464,284.
Application 17/464,284 is a continuation of application No. 16/424,773, filed on May 29, 2019, granted, now 11,133,957.
Prior Publication US 2021/0399917 A1, Dec. 23, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 12/28 (2006.01); H04L 12/40 (2006.01); H03H 7/38 (2006.01); F24F 11/56 (2018.01); H04L 12/44 (2006.01)
CPC H04L 12/40 (2013.01) [F24F 11/56 (2018.01); H03H 7/38 (2013.01); H04L 12/44 (2013.01); H04L 2012/40215 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A heating, ventilation, and air conditioning (HVAC) system that is configured to provide conditioned air when set up in an installation, the HVAC system comprising:
an outdoor unit and an indoor unit configured to provide condensing and evaporating operations to condition air that is moved through the HVAC system, and additional components configured to support operation of the HVAC system to provide the conditioned air; and
transceiver circuits coupled to respective ones of the indoor unit, the outdoor unit and the additional components, the transceiver circuits coupled together in a controller area network (CAN) in which at least three of the transceiver circuits are primary nodes, and others of the transceiver circuits are end nodes, the primary nodes coupled together and having a predetermined termination impedance, and the end nodes are coupled to one or more of the primary nodes and are without a termination impedance that is set or adjusted based on the installation.