These 19" rack mounting industrial enclosures are supplied complete with factory-installed backplanes to ensure simple and easy fitting of accessory boards. Backplanes are available in full and half size analog, and full and half size digital. If your application requires only a few inputs or outputs, a single accessory board, packaged in it's own enclosure, is available. If your system will be integrated into a custom EMC compliant chassis, standalone accessory boards are also available.