Some manufacturers provide gateway interface modules that enable communication with modern building automation system networks. Which statement best describes their function?

• A. They replace field controllers with new devices.
• B. They distribute decision making across the network.
• C. They allow central supervisory control systems to communicate with modern building automation system networks.
• D. They provide power to sensors in remote locations.

Answer: (C)

Gateway interface modules act as bridges that translate and relay information between a central supervisory control system and modern building automation networks. They enable the central system to talk to field devices and networks that use different communication protocols, so monitoring, data access, and commands can flow across the entire system. They don’t replace local field controllers, which still make or execute control decisions at the site. They also don’t supply power to sensors. The gateway’s role is strictly to enable interoperability by translating protocols, data formats, and addressing so the central system can communicate with modern networks.