What is an automation protocol commonly used for communication between devices?

OPC UA (Open Platform Communications Unified Architecture) is a prominent automation protocol specifically designed for the industrial automation sector. It facilitates smooth communication between various devices and systems, enabling interoperability and data exchange in a standardized manner. OPC UA is particularly valued for its flexibility, enhanced security features, and ability to work seamlessly across different platforms and operating systems.

In industrial settings, OPC UA is used to connect devices such as sensors, controllers, and enterprise systems, allowing for real-time data sharing and control. This capability is crucial for modern manufacturing and process automation, where diverse systems must communicate efficiently to optimize production and monitor system health.

In contrast, the other options serve different purposes. HTTP (Hypertext Transfer Protocol) is primarily used for transferring web pages and is not tailored for the specific needs of automation. FTP (File Transfer Protocol) is designed for transferring files over a network but does not facilitate real-time communication between devices in an automation context. NTP (Network Time Protocol) is used to synchronize clocks across computer networks and does not address device communication directly. Thus, OPC UA stands out as the most suitable choice for facilitating communication between devices in automation environments.