SNAP Ultimate I/O systems are compatible with SNAP I/O modules and B-Series racks and run control programs built with PAC Control software. HMI and other applications in the included PAC Project Basic software suite are also supported. Note that SNAP PAC R-Series On-the-Rack Controllers are a more powerful, lower cost option. Packaged Rack- and Panel-Mounted SNAP Ultimate I/O (and PAC-R) Systems are available; contact Allied for information.