ip66 waterproof pushbutton switch 1.easy to set up 2.voltage:24-380V 3. ... enter figure: 1-one NO, 2-one NC, 3- two NO, 4-two NC, 5- NO+NC3. Only land contact-replacement: Example ... light,self-lock,self reset,convex,waterproof... ip66 waterproof pushbutton switch XB4-BP21,spring return