... /Special Features :1)the input voltage is DC24V ,it is NPN input type, the input point is 12 points , ... Optocoupler t isolate the input side and the output side , which making the PLC board has quality to ... disturb ,and its quality is stable 3) this PLC board use the single film control , compare with ... other kinds of PLC , the price is much more compretitive and low ...