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.