Appoldt DIN Rail Mount Rail-mount USB stick 626294 - Appoldt 9003, The Appoldt Rail-mount USB stick is an 8GB USB 2.0 device designed for electronic diagrams and data transfer. It features an IP54 rating, providing protection against dust and water splashes. Typically used with relay printed circuit boards, it integrates seamlessly into automation and control systems. Appoldt 9003 Rail-Mount USB Stick 8GB IP54, Easy DIN Rail Install