Printed circuit boards (PCB)Â attach to enclosures or plug directly into computers.
Panel mount modules are bolted onto a chassis or attach to a panel.
Rack mount devices fit inside enclosures such as a standard 19" telecom rack.
DIN rail products are mounted on a rail standardized by the Deutsches Institut für Normung, a German national standards body. Common DIN rail widths include 15 mm, 35 mm, and 75 mm.
Stand-alone units are placed on a bench or floor. They include a full casing or cabinet as well as an integral interface.