Master/Slave, C Series PROFIBUS Interface Module—The cRIO-PB-MS connects NI programmable automation controllers (PACs) to PROFIBUS industrial networks as powerful masters or slaves. The interface includes the NI-PROFIBUS for CompactRIO instrument driver for human machine interface (HMI) and SCADA applications, as well as a graphical networking Configurator software. You can perform PROFIBUS device automated test using these interfaces. The cRIO-PB-MS is compatible with only CompactRIO systems.