HMI, PLC, Scada manufacturer / supplier in China, offering Fr-D1600 16 Bipolar Input (NPN/PNP compatible) Digital Input Module, Flexem Fr-D0808n PLC Io Module – 8di 8do NPN/PNP Input, NPN Output, Remote Io Expansion for FL8 Series, Fr-Ecat 2*RJ45 Ethercat Bus Couple and so on.