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Content DescriptionClimateTalk is an open standard that defines a set of messages and commands to enable interoperability, enhanced user interface, and machine to machine control independent of the physical layer connecting the devices. The messages and commands defined by ClimateTalk Information Model (CIM) are the presentation and application layers as defined by the OSI Model . ClimateTalk Applications are fully defined at Layer 7 of the OSI model by a combination of a Device Specific Application Profile, the Generic Application Specification and the Command Reference. ClimateTalk messages can be carried over any physical medium following the OSI model. The ClimateTalk Presentation Layer defines how messages are executed over the various physical mediums in use. CT-485 and CT-LWP are wired serial physical and network layers designed to support the formation of ClimateTalk networks and transport ClimateTalk messages, but other OSI based protocols – including wireless transports - can be used as well. CT-485 is a Physical, Data Link, and Networking set of specifications that define one of the physical media over which ClimateTalk messages are sent. CT-485 is a variant of EIA/TIA-485 standards with provisions against incorrect wiring and grounding requirements that meet the needs of residential systems. This document defines the Network Layer requirements for CT-485, which corresponds to OSI Layer 3. The Network Layer in CT-485 includes some of the functions performed by the OSI Transport and Session Layers. Included in the Network Specification is the higher-level network functionality including Routing, Addressing, and Network Timing as well as the requirements for a CT-485 device to operate within a defined network structure.About NEMANEMA is an abbreviation for National Electrical Manufacturers Association. It is a trade association representing manufacturers of electrical products and equipment. NEMA develops and publishes industry standards for various aspects of electrical engineering, including enclosures, motors, and more. |
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