This slide provides more in-depth information on industrial connectivity standards. Fieldbus was a common term for a wide range of connectivity standards, originally developed to allow programmable logic controllers to communicate with sensors and actuators. It was designed to replace the RS232 and the 4-20 mA control schemes, and is a message based system. Profibus is probably the most widely used of the field bus standards and was primarily used in the factory automation and the industrial application. Control Area Network, CAN, was originally intended for automotive communications but is starting to migrate into industrial and automation applications. CAN is very robust, very immune to noise, and it is great in harsh environments. These are some of the original reasons that CAN was chosen for the automotive space. The Industrial Ethernet IEEE-1588, is also commonly known as Precision Time Protocol, or PTP. Ethernet on its own is not a synchronized clock architecture, but IEEE-1588 adds a synchronized clock. IEEE-1588 is compatible with IPv4, and the new IPv6 standard that is starting to take hold within the industry, as well. Power Line Communication, PLC, (not to be confused with a programmable logic controller) is an emerging technology in the utility networking community.