Typical BACnet® application. W0000927.pdf (application/pdf Object) BACnet Overview - KMC Controls In Touch. This data communications protocol is an agreed-upon set of rules for creating interoperable (open) networks of building systems.
The protocol encompasses all building systems from HVAC and building automation to lighting, security, fire and life safety, etc. It was developed by the American Society of Heating, Refrigerating, and Air-conditioning Engineers (ASHRAE; www.ashrae.org) but has become an American national standard, a European standard, a national standard in more than 30 countries, and an ISO global standard (ISO-16484-5). It defines the messages that various devices exchange and how those messages are delivered. As an “open standard,” BACnet enables facility professionals to future-proof their buildings by installing a system that allows for multiple product providers or multiple service providers. In addition, the standard itself adapts to emerging initiatives to ensure that both present and future needs are met in terms of building system integration.
HPAC-3-97.pdf (application/pdf Object) Ethernet_Buzzword_Guide.pdf (application/pdf Object) Ethernet_Basics.pdf (application/pdf Object) Relationship Between Ethernet and TCP/IP. Real Time Automation. Book Description: This book is a convenient installation, troubleshooting, and reference tool on one of the hottest topics in automation and process control. It will help you understand important Ethernet and TCP/IP terminology and provide important information about the new industrial protocols.
You will quickly gain a solid grasp of Ethernet basics, the constraints of the industrial environment, and the specialized requirements of machine control. HART Protocol.pdf. How LAN Switches Work" How Ethernet Works" Bridges can reduce congestion by allowing multiple conversations to occur on different segments simultaneously, but they have their limits in segmenting traffic as well.
An important characteristic of bridges is that they forward Ethernet broadcasts to all connected segments. This behavior is necessary, as Ethernet broadcasts are destined for every node on the network, but it can pose problems for bridged networks that grow too large. When a large number of stations broadcast on a bridged network, congestion can be as bad as if all those devices were on a single segment. Routers are advanced networking components that can divide a single network into two logically separate networks. How Routers Work" Parallel communication. Serial communication. In telecommunication and computer science, serial communication is the process of sending data one bit at a time, sequentially, over a communication channel or computer bus.
This is in contrast to parallel communication, where several bits are sent as a whole, on a link with several parallel channels. Virtual private network. VPN connectivity overview A virtual private network connection across the Internet is similar to a wide area network (WAN) link between sites.
From a user perspective, the extended network resources are accessed in the same way as resources available within the private network.[2] VPNs allow employees to securely access their company's intranet while traveling outside the office. Similarly, VPNs securely connect geographically disparate offices of an organization, creating one cohesive network. VPN technology is also used by Internet users to connect to proxy servers for the purpose of protecting personal identity and location. Telemetry. An expendable dropsonde used to capture weather data.
The telemetry consists of sensors for pressure, temperature, and humidity and a wireless transmitter to return the captured data to an aircraft. Telemetry is the highly automated communications process by which measurements are made and other data collected at remote or inaccessible points and transmitted to receiving equipment for monitoring.[1] The word is derived from Greek roots: tele = remote, and metron = measure. Systems that need external instructions and data to operate require the counterpart of telemetry, telecommand.[2] Although the term commonly refers to wireless data transfer mechanisms (e.g., using radio, ultrasonic, or infrared systems), it also encompasses data transferred over other media such as a telephone or computer network, optical link or other wired communications like phase line carriers.
IEC 61131-3. IEC 61131-3 is the third part (of 8) of the open international standard IEC 61131 for programmable logic controllers, and was first published in December 1993 by the IEC.
The current (third) edition was published in February 2013. Internet Protocol Suite. The Internet protocol suite is the computer networking model and set of communications protocols used on the Internet and similar computer networks.
It is commonly known as TCP/IP, because its most important protocols, the Transmission Control Protocol (TCP) and the Internet Protocol (IP), were the first networking protocols defined in this standard. Often also called the Internet model, it was originally also known as the DoD model, because the development of the networking model was funded by DARPA, an agency of the United States Department of Defense. TCP/IP provides end-to-end connectivity specifying how data should be packetized, addressed, transmitted, routed and received at the destination. The TCP/IP model and related protocol models are maintained by the Internet Engineering Task Force (IETF). History[edit] Early research[edit] Diagram of the first internetworked connection Specification[edit] Adoption[edit]