Wieland Electric is among the leading manufacturers of electrical connection technology in the world market. The company's product range comprises more than 20,000 different components for automation technology and building installation. The Wieland product range - Automation Technology (AT) From control to field applications - Wieland offers innovative and reliable components for industrial use. Building Installation Technology (BIT) GESIS by Wieland:the pluggable building installation system has been proven in the most famous buildings in the world.