NAI's Intelligent Function Modules provide uniquely flexible, mix & match customization options for use with our COTS hardware. Learn MoreModules AR1 & AR2 are NAI’s latest generation ARINC Communication Modules. Module AR1 features up to twelve programmable ARINC 429 channels. Module AR2 features two channels with one providing ARINC 568 communication and the other providing ARINC 579 communication. These modules are used on our Multifunction Embedded I/O Boards, Rugged Systems, and Single Board Computers (SBCs) offered in OpenVPX, cPCI, VME, and PCI/PCIe configurations.