Shield terminal block, 280 Series, operating tool This shield terminal block (item number 280-640) streamlines wire connections, making them both quick and easy. Strip lengths must be between 8 and 9 mm when connecting conductors to this shield terminal block. Shield terminal blocks connect directly to the mounting rail thanks to a built-in contact foot. This creates an electrical and mechanical connection between the electrical conductors and the mounting adapter, and safely dissipates interference signals. This product incorporates conductor terminals and utilizes CAGE CLAMP®. Our trusted universal connection known as CAGE CLAMP® leads the way when it comes to connection technology and electrical interconnections. This shield terminal block is suitable for conductor cross sections ranging from 0.08 mm² to 2.5 mm². An operating tool is used to operate this through rail-mount terminal block.